SINAMICS G120 CU240E-2 PN: Installation, Wiring, and Commissioning Guide
The 6SL3244-0BB12-1FA0 is a SINAMICS G120 CU240E-2 PN control unit with PROFINET IO and EtherNet/IP communication. It snaps onto a G120 Power Module (PM230, PM240, PM240-2, PM250, PM260, or PM340) to form a complete frequency inverter for 3-phase AC motor control. The CU240E-2 PN features 6 digital inputs, 2 analog inputs, 3 digital outputs (1 relay + 1 transistor + 1 relay), 2 analog outputs, and dual PROFINET ports (X150 P1/P2) with integrated 2-port switch for line topology. The control unit supports V/f control, sensorless vector control, and can be commissioned using a BOP-2 (Basic Operator Panel), IOP (Intelligent Operator Panel), STARTER, or Startdrive (TIA Portal). This guide covers Power Module assembly, control terminal wiring, PROFINET network setup, basic commissioning, and LED/fault diagnostics — all specifications sourced directly from the Siemens Operating Instructions (A5E34259001B AA, Edition 04/2014, FW V4.7) and List Manual (A5E33839529, Edition 09/2020, FW V4.7 SP13).
Contents
1. Control Unit Overview
Each SINAMICS G120 inverter comprises a Control Unit and a Power Module (Operating Instructions, Section 3.1, page 23). The Control Unit controls and monitors the Power Module and the connected motor. The Power Modules are available for motors with a power range of 0.37 kW to 250 kW. An optional operator panel (BOP-2 or IOP) snaps onto the top of the Control Unit for local operation and commissioning.
The CU240E-2 Control Units have, in comparison to the CU240B-2, an extended terminal strip with integrated safety functions. The CU240E-2 variants differ with regard to the type of fieldbus and the scope of the integrated safety functions (Operating Instructions, Table 3-2, page 24).
CU240E-2 Technical Data
The following specifications are from the CU240E-2 Technical Data table (Operating Instructions, Section 12.2, pages 305–307).
| Feature | Details |
|---|---|
| Fieldbus Interface | PROFINET IO, EtherNet/IP — dual RJ45 ports (X150 P1 and P2) with integrated 2-port switch (Section 4.4.3, page 65) |
| Operating Voltage | Supply from Power Module, or external 24 VDC via terminals 31/32 (20.4…28.8 VDC, PELV per EN 61800-5-1, Class 2). Power supply is electrically isolated from the control terminals. (Section 12.2, page 305) |
| Current Consumption | Max 0.5 A (Section 12.2, page 305) |
| Power Loss | 5.0 W (plus power loss of output voltages) (Section 12.2, page 305) |
| Digital Inputs | 6 (DI 0–DI 5); low < 5 V, high > 11 V; 30 V max input; 5.5 mA current consumption; electrically isolated; PNP/NPN switchable; SIMATIC-compatible; 10 ms response time (for debounce time p0724 = 0) (Section 12.2, page 305) |
| Pulse Input | 1 (DI 3); max frequency 32 kHz (Section 12.2, page 305) |
| Analog Inputs | 2 (AI 0, AI 1); differential input; switchable: 0…10 V, 0/4…20 mA, or −10…+10 V; 12-bit resolution; 13 ms ± 1 ms response time. AI 0 can also be configured as additional digital input: low < 1.6 V, high > 4.0 V (Section 12.2, page 305) |
| Digital Outputs | 3 (DO 0, DO 1, DO 2): DO 0 = relay output (NC/NO/COM); DO 1 = transistor output (protection against incorrect voltage polarity); DO 2 = relay output (NC/NO/COM); all 30 V DC, max 0.5 A resistive load; 2 ms update time (Section 12.2, page 306) |
| Analog Outputs | 2 (AO 0, AO 1); 0…10 V or 0…20 mA; reference potential “GND”; 16-bit resolution; 4 ms update time (Section 12.2, page 306) |
| Temperature Sensor | PTC (short-circuit monitoring 22 Ω, switching threshold 1650 Ω) or KTY84 (short-circuit monitoring < 50 Ω, wire break > 2120 Ω); temperature switch with isolated contact (Section 12.2, page 306) |
| Fail-Safe Digital Input | 1 (DI 4 and DI 5 form the fail-safe digital input when basic safety functions are enabled); 30 V max, 5.5 mA; response time: typical 5 ms + debounce (p9651), worst case 15 ms + debounce; typical 6 ms if debounce = 0, worst case 16 ms if debounce = 0 (Section 12.2, page 306) |
| Safety PFH | 5 × 10−8 (Probability of Failure per Hour) (Section 12.2, page 306) |
| Output Voltages | +24 V out (terminal 9): 18…28.8 V, max 200 mA, referred to GND (terminal 28); reference for terminals 1, 9, 12, and 26; also reference for terminals 5, 7, and 16 via DI COM1 (terminal 69) and terminals 6, 8, and 17 via DI COM2 (terminal 34). +10 V out (terminal 1): 9.5…10.5 V, max 10 mA (Section 4.4.5.1, page 69; Section 12.2, page 305) |
| Setpoint Resolution | 0.01 Hz (Section 12.2, page 305) |
| USB Interface | Mini-B (for STARTER or Startdrive connection) (Section 12.2, page 306) |
| Memory Card | SD/MMC slot for parameter backup, firmware update, and drive cloning (Section 4.4.2, page 64; Section 3.2, page 25) |
| Dimensions (W × H × D) | 73 × 199 × 39 mm (depth valid when mounted on Power Module) (Section 12.2, page 306) |
| Weight | 0.49 kg (Section 12.2, page 306) |
| Operating Temperature | 0…55 °C (without operator panel); 0…53 °C (PN without operator panel, side-by-side mounting, PM input > 480 V); 0…50 °C (with operator panel installed) (Section 12.2, page 307) |
| Storage Temperature | −40…70 °C (Section 12.2, page 307) |
| Relative Humidity | < 95%, condensation not permissible (Section 12.2, page 307) |
| Operator Panel | BOP-2 (6SL3255-0AA00-4CA1) or IOP (6SL3255-0AA00-4JA0) — snaps onto CU top port; degree of protection with BOP-2: IP55; with IOP: IP54 or UL Type 12 (Section 3.5, page 39) |
Compatible Power Modules
The CU240E-2 can be combined with all G120 Power Modules (Operating Instructions, Table 3-4, page 25). The CU240B-2 cannot be combined with the PM340.
| Power Module | Input Voltage | Power Range (LO) | Notes |
|---|---|---|---|
| PM230 | 3 AC 380–480 V | 0.37…90 kW (IP20) | Pump and fan applications; DC braking only; frame sizes FSA…FSF (Section 3.3, page 26) |
| PM240 | 3 AC 380–480 V | 0.37…250 kW | Standard applications; dynamic braking via external braking resistor; frame sizes FSA…FSGX (Section 3.3, page 27) |
| PM240-2 | 3 AC 380–480 V | 0.55…15 kW (IP20) | Compact frame; external braking resistor connection; frame sizes FSA…FSC (Section 3.3, page 27) |
| PM250 | 3 AC 380–480 V | 7.5…90 kW | Regenerative braking (energy feedback to line supply); frame sizes FSC…FSF (Section 3.3, page 27) |
| PM260 | 3 AC 660–690 V | 11…55 kW | Regenerative braking with sine-wave filter; frame sizes FSD…FSF (Section 3.3, page 27) |
| PM340 | 1 AC 200–240 V | 0.12…0.75 kW | Single-phase input; dynamic braking via external braking resistor; frame size FSA only (Section 3.3, page 26) |
Control Unit vs Power Module
The G120 is a modular system. The Control Unit (CU240E-2 PN) handles motor control algorithms, I/O, and communication. The Power Module (PM230, PM240, etc.) handles the power electronics — AC input, DC bus, IGBT inverter, motor output. You order them separately and snap the CU onto the PM. Different CU variants provide different fieldbus options; the PM determines the power rating and voltage class. (Operating Instructions, Section 3.1, page 23)
2. Hardware Installation
Install components in the following order per the G120 Operating Instructions (Section 4.1, page 41): accessories first, then the Power Module, then the Control Unit.
Attaching the Control Unit to the Power Module
The procedure for connecting Power Modules and Control Units is described in Operating Instructions Section 4.4.1 (page 63):
- De-energise the Power Module. Disconnect the AC supply and verify zero voltage at the input terminals. Wait the discharge time specified on the warning labels (Section 1.1, page 13).
- Locate the lugs at the rear of the Control Unit in the matching recesses of the Power Module.
- Mount the Control Unit onto the Power Module so that it audibly snaps into place. The CU must be fully seated for the internal bus connector to make contact.
- To remove the CU: press the release button on the Power Module and withdraw the Control Unit straight forward.
- Attach the operator panel (optional): BOP-2 or IOP snaps onto the port at the top of the Control Unit. Power is supplied by the CU — no separate wiring required. Degree of protection with BOP-2: IP55; with IOP: IP54 or UL Type 12 (Section 3.5, page 39).
CU240E-2 Front Panel Interfaces
To access the interfaces at the front of the Control Unit, lift the Operator Panel (if installed) and open the front doors (Operating Instructions, Section 4.4.2, page 64).
| Item | Description |
|---|---|
| Memory card slot | SD/MMC memory card for parameter backup, firmware update, and series commissioning (Section 4.4.2 item 1) |
| Terminal strips (upper & lower) | All control I/O wiring; see Section 3 Terminal Wiring below (Section 4.4.2 item 2) |
| DIP switches (AI0/AI1) | Switch analog inputs between current (I: 0/4…20 mA) and voltage (U: −10/0…10 V) (Section 4.4.2 item 9) |
| Status LEDs | RDY (green/red), BF (red/yellow), LNK1/LNK2 (green) — PROFINET (Section 4.4.2 item 7) |
| USB port | Mini-B connector for STARTER or Startdrive PC connection (Section 4.4.2 item 8) |
| Fieldbus interface (bottom) | Dual RJ45 ports X150 P1 and P2 for PROFINET IO / EtherNet/IP; pin 1 = RX+, pin 2 = RX−, pin 3 = TX+, pin 6 = TX− (Section 4.4.3, page 65) |
| Operator panel port (top) | Connection for BOP-2 or IOP — CU supplies power (Section 4.4.2 item 10) |
Capacitor Discharge
After disconnecting AC power, wait until the discharge time specified on the warning labels has elapsed before working on the drive or Power Module. Internal DC bus capacitors retain lethal voltage. Verify 0 V DC at the DC bus terminals with a voltmeter before touching any internal components. (Operating Instructions, Section 1.1, page 13)
3. Terminal Wiring
All control wiring connects to the CU240E-2 terminal strip. Power wiring (L1/L2/L3 input and U/V/W motor output) connects directly to the Power Module terminals — not to the Control Unit. The CU240E-2 terminal strip is shown in the Operating Instructions, Section 4.4.5.1 (page 69).
CU240E-2 Control Terminal Pinout
Terminal assignments from the CU240E-2 terminal strip diagram (Operating Instructions, Section 4.4.5.1, page 69). Note: the CU240E-2 has an extended terminal strip compared to the CU240B-2, adding terminals for AI 1, AO 1, DI 4, DI 5, DO 1, DO 2, and DI COM2.
| Terminal | Label | Function |
|---|---|---|
| 1 | +10V OUT | 10 V reference output for external potentiometer; 9.5…10.5 V, max 10 mA; referred to GND (terminal 2) |
| 2 | GND | Reference ground for terminals 1, 9, 12, and 26 |
| 3 | AI 0+ | Analog input 0 positive; −10…+10 V or 0/4…20 mA (switchable via DIP switch) |
| 4 | AI 0− | Analog input 0 reference |
| 5 | DI 0 | Digital input 0; reference via DI COM1 (terminal 69) |
| 6 | DI 1 | Digital input 1; reference via DI COM2 (terminal 34) |
| 7 | DI 2 | Digital input 2; reference via DI COM1 (terminal 69) |
| 8 | DI 3 | Digital input 3 (also usable as pulse input, max 32 kHz); reference via DI COM2 (terminal 34) |
| 9 | +24V OUT | 24 V output (18…28.8 V), max 200 mA; referred to GND (terminal 28); for powering digital inputs |
| 10 | AI 1+ | Analog input 1 positive; −10…+10 V or 0/4…20 mA (switchable via DIP switch) |
| 11 | AI 1− | Analog input 1 reference |
| 12 | AO 0+ | Analog output 0; 0…10 V or 0…20 mA; 16-bit resolution; referred to GND (terminal 13) |
| 13 | GND | Reference ground for AO 0 |
| 14 | T1 MOTOR | Motor temperature sensor positive (PTC / KTY84 / bimetallic) |
| 15 | T2 MOTOR | Motor temperature sensor negative |
| 16 | DI 4 | Digital input 4 (reserved for safety function when basic safety functions are enabled); reference via DI COM1 (terminal 69) |
| 17 | DI 5 | Digital input 5 (reserved for safety function when basic safety functions are enabled); reference via DI COM2 (terminal 34) |
| 18 | DO 0 NC | Digital output 0 — normally closed relay contact |
| 19 | DO 0 NO | Digital output 0 — normally open relay contact |
| 20 | DO 0 COM | Digital output 0 — relay common; max 0.5 A, 30 V DC |
| 21 | DO 1+ | Digital output 1 — transistor output positive; max 0.5 A, 30 V DC; protection against incorrect voltage polarity |
| 22 | DO 1− | Digital output 1 — transistor output negative |
| 23 | DO 2 NC | Digital output 2 — normally closed relay contact |
| 24 | DO 2 NO | Digital output 2 — normally open relay contact |
| 25 | DO 2 COM | Digital output 2 — relay common; max 0.5 A, 30 V DC |
| 26 | AO 1+ | Analog output 1; 0…10 V or 0…20 mA; 16-bit resolution; referred to GND (terminal 27) |
| 27 | GND | Reference ground for AO 1 |
| 28 | GND | Reference ground for terminal 9 (+24V OUT) |
| 31 | +24V IN | Optional external 24 V supply positive; 20.4…28.8 V; PELV per EN 61800-5-1; keeps CU powered when PM is de-energised |
| 32 | GND IN | Reference for terminal 31; 0 V must be connected to PE via low-resistance connection |
| 34 | DI COM2 | Digital input common 2 (reference for terminals 6, 8, and 17) |
| 69 | DI COM1 | Digital input common 1 (reference for terminals 5, 7, and 16) |
Default Terminal Assignments (PROFINET, Default Setting 7)
The factory setting for CU240E-2 Control Units with PROFIBUS or PROFINET interface is Default Setting 7: “Switch over between fieldbus and jogging using DI 3” (Operating Instructions, Section 4.4.5.2, page 71, and Section 4.4.5.3, page 74). The function of the fieldbus interface depends on DI 3.
| Terminal | Input | Default Function (Setting 7, DI 3 = High — Fieldbus Active) |
|---|---|---|
| 3/4 | AI 0 | No function (speed setpoint via fieldbus PROFIdrive telegram 1) |
| 5 | DI 0 | No function |
| 6 | DI 1 | No function |
| 7 | DI 2 | Acknowledge fault |
| 8 | DI 3 | Switchover control (high = fieldbus / low = jog) |
| 10/11 | AI 1 | No function |
| 16 | DI 4 | No function |
| 17 | DI 5 | No function |
| 12/13 | AO 0 | Speed actual value (0…10 V) |
| 21/22 | DO 1 | Alarm |
| 18/19/20 | DO 0 | Fault |
| 23/24/25 | DO 2 | No function |
| 26/27 | AO 1 | Current actual value (0…10 V) |
When DI 3 = low (fieldbus not active), the defaults change: DI 0 = Jog 1, DI 1 = Jog 2. Inverter receives control signals via PROFIdrive telegram 1 when DI 3 = high (fieldbus active). (Operating Instructions, Section 4.4.5.2, page 71)
PROFINET Ports (X150)
The CU240E-2 PN has two RJ45 connector sockets for PROFINET IO at the lower side of the Control Unit (Operating Instructions, Section 4.4.3, page 65).
| Port | Connector | Function |
|---|---|---|
| X150 P1 | RJ45 | PROFINET IO / EtherNet/IP port 1; connect to PROFINET switch or PLC port. Pin 1: RX+, Pin 2: RX−, Pin 3: TX+, Pin 6: TX− |
| X150 P2 | RJ45 | PROFINET IO / EtherNet/IP port 2; integrated 2-port switch supports line (daisy-chain) topology |
Wiring Guidelines
Cable routing and shielding requirements from Operating Instructions, Section 4.5.2 (pages 78–80):
- Route all power cables (line supply, motor, braking resistor) separately from signal and data cables. Maintain a minimum clearance of 25 cm.
- Signal and data cables may only cross non-filtered power cables at right angles.
- Use shielded motor cables and shielded signal/data cables.
- Connect cable shields to the grounded enclosure at both ends with a large surface area connection.
- Use the shield connection plate of the Control Unit as strain relief.
- Terminal strip wiring accepts solid or flexible cable: 0.5…1.5 mm²; strip length 9 mm (Section 4.4.6, page 77).
- If signal cables exceed 30 m, connect an overvoltage protection element between the terminal and the associated reference potential (Section 4.4.6, page 77).
CU240E-2 PN 24 V Short-Circuit Warning
The CU240E-2 PN and CU240E-2 PN-F Control Units can be damaged if ALL three of the following conditions occur simultaneously: (1) a short-circuit at the 24 V output on terminal 9 while the inverter is operational, (2) the ambient temperature is at the upper permitted limit, and (3) an external 24 V supply is connected to terminals 31/32 at the upper voltage limit. To prevent damage, ensure all three conditions do not occur at the same time. (Operating Instructions, Section 4.4.5.1, page 70, NOTICE)
4. Commissioning & Basic Parameters
The CU240E-2 PN can be commissioned using the following tools (Operating Instructions, Section 3.5, page 39):
Commissioning Tools
| Tool | Order Number | Method |
|---|---|---|
| BOP-2 (Basic Operator Panel) | 6SL3255-0AA00-4CA1 | Snaps onto CU top port; two-line display; guided basic commissioning |
| IOP (Intelligent Operator Panel) | 6SL3255-0AA00-4JA0 | Snaps onto CU top port; plain-text menu display; application wizards |
| STARTER | 6SL3072-0AA00-0AG0 (DVD) | PC software; connects via USB, PROFIBUS, or PROFINET; full parameter access; trace function |
| Startdrive | 6SL3072-4CA02-1XG0 (DVD) | TIA Portal add-in; connects via USB or PROFINET; full parameter access; drive wizard |
| SINAMICS PC Inverter Connection Kit 2 | 6SL3255-0AA00-2CA0 | USB cable (3 m) for connecting PC to inverter |
Key Commissioning Parameters
The following parameters are used during quick commissioning (Operating Instructions, Section 5.4, pages 90–99). Set p0010 = 1 to enter quick commissioning mode.
| Parameter | Description | Typical Setting |
|---|---|---|
| p0003 | User access level | 1 = Standard, 2 = Extended, 3 = Expert, 4 = Service (password protected) |
| p0010 | Commissioning parameter filter | 1 = Quick commissioning; 0 = Ready to run |
| p0100 | Motor data units / power standard | 0 = kW (IEC); 1 = HP (NEMA) |
| p0304 | Motor rated voltage | From motor nameplate (V) |
| p0305 | Motor rated current | From motor nameplate (A) |
| p0307 | Motor rated power | From motor nameplate (kW or HP) |
| p0308 | Motor rated power factor (cosφ) | From motor nameplate |
| p0310 | Motor rated frequency | 50 Hz or 60 Hz (from motor nameplate) |
| p0311 | Motor rated speed | From motor nameplate (rpm) |
| p1080 | Minimum speed | 0 rpm (application-dependent) |
| p1082 | Maximum speed | Motor nameplate speed (rpm) |
| p1120 | Ramp-up time | 10 s default; adjust for application |
| p1121 | Ramp-down time | 10 s default; adjust for application |
| p3900 | End quick commissioning | 1 = calculate motor model and finish; 2 = finish without motor ID; 3 = finish with motor ID at standstill |
Quick Commissioning Steps (BOP-2)
Procedure from Operating Instructions, Section 5.4.1 (pages 90–94):
- Apply power to the drive. The RDY LED is temporarily orange after power-on. Once it turns green or red, it signals the inverter state (Section 11.1, page 284).
- Set p0010 = 1 (quick commissioning mode). On the BOP-2: scroll to p0010, press P to edit, set to 1, press P to confirm.
- Enter motor nameplate data: set p0304 (voltage), p0305 (current), p0307 (power), p0308 (cosφ), p0310 (frequency), and p0311 (speed).
- Set speed limits: p1080 (minimum speed) and p1082 (maximum speed).
- Set ramp times: p1120 (ramp-up) and p1121 (ramp-down).
- End quick commissioning: set p3900 = 1. The drive calculates the motor model and writes all parameters. p0010 automatically returns to 0.
- Perform a test run with no load on the motor shaft. Verify direction of rotation and ramp behaviour.
PROFINET Configuration
PROFINET communication setup is described in Operating Instructions, Chapter 7.1 (pages 116–120).
- Assign a PROFINET device name using Startdrive, STARTER, or a PROFINET configuration tool (e.g., TIA Portal “Accessible devices”). The device name must match the name assigned in the PLC project (Section 7.1.2, page 118; Section 7.1.3, page 118).
- Set the IP address via the PROFINET IO controller during commissioning, or configure a fixed IP address on the drive using parameters p8912 (IP address) / p8913 (subnet mask).
- Select the I/O telegram in the PLC project. The G120 supports standard telegrams (e.g., Telegram 1: speed setpoint + control word / status word) and PROFIdrive profile telegrams (e.g., Telegram 352 for conveyor applications) (Section 7.1.4, page 119).
- Verify link status. The LNK LED(s) on the CU will illuminate green steady on each active PROFINET port. The BF LED will be off once PROFINET data exchange is established (Section 11.1, Table 11-2, page 284).
BOP-2 Navigation (Appendix A.4, pages 349–352)
On the BOP-2, press the Up / Down keys to scroll through parameters. Press P to enter edit mode. Use Up / Down to change the value. Press P again to confirm. Press Fn to toggle the display between the parameter number and its current value.
Motor Nameplate Data Is Required
The drive must be programmed with accurate motor nameplate data (voltage, current, power, cosφ, frequency, speed) before running. Incorrect values can cause motor overheating, nuisance trips, or poor torque performance. Read all values directly from the motor nameplate — never estimate. (Operating Instructions, Section 5.1, page 83)
5. Diagnostics & Troubleshooting
CU240E-2 PN LED Status Indicators
LED states from Operating Instructions, Section 11.1 (pages 284–285). The RDY LED is temporarily orange after power-on. Two flashing rates are used: slow flashing (2 s period) and quick flashing.
Inverter Diagnostics (Table 11-1, page 284)
| RDY LED | BF LED | Meaning |
|---|---|---|
| GREEN — on | Not relevant | There is presently no fault; drive ready |
| GREEN — slow flash | — | Commissioning or reset to factory settings in progress |
| RED — on | YELLOW — variable frequency | Firmware update in progress |
| RED — slow flash | RED — slow flash | Inverter waits until the power supply is switched off and switched on again after a firmware update |
| RED — fast flash | Not relevant | There is presently a fault |
| RED — fast flash | RED — fast flash | Incorrect memory card or unsuccessful firmware update |
PROFINET Communication Diagnostics (Table 11-2, page 284)
| LNK LED | Meaning |
|---|---|
| GREEN — on | The communication via PROFINET is in order |
| GREEN — slow flash | Device naming is active |
| Off | No communication via PROFINET |
Safety Function Diagnostics (Table 11-5, page 285)
| SAFE LED | Meaning |
|---|---|
| YELLOW — on | One or more safety functions are enabled, but not active |
| YELLOW — slow flash | One or more safety functions are active; no safety function faults have occurred |
| YELLOW — rapid flash | The converter has detected a safety function fault and initiated a STOP response |
Common Faults and Alarms
The following are the most common faults and alarms from the Operating Instructions, Section 11.5 (pages 295–301). Fault codes use the format Fxxxxx (faults) and Axxxxx (alarms). Faults require acknowledgement; alarms disappear once the cause is removed (Section 11.3, page 287; Section 11.4, page 290).
| Code | Description | Corrective Action |
|---|---|---|
| F30001 | Overcurrent | Check motor data and commissioning. Check motor connection (Y/Δ). Check power cable connections for short-circuit or ground fault. Increase acceleration ramp (p1120). Reduce load. (page 300) |
| F30002 | DC-link voltage overvoltage | Increase ramp-down time (p1121). Set rounding times (p1130, p1136). Activate DC-link voltage controller (p1240, p1280). Check line voltage (p0210). (page 300) |
| F30003 | DC-link voltage undervoltage | Check line voltage (p0210). Check supply connections. (page 300) |
| F30004 | Inverter overtemperature | Check whether fan is running. Check ambient temperature is in permissible range. Check motor load. Reduce pulse frequency. (page 300) |
| F30005 | I2t inverter overload | Check rated currents of motor and Power Module. Reduce current limit (p0640). Reduce p1341 for U/f operation. (page 300) |
| F30011 | Line phase failure | Check the inverter’s input fuses. Check the motor feeder cables. (page 301) |
| F30015 | Motor cable phase failure | Check motor cables. Increase ramp-up or ramp-down time (p1120). (page 301) |
| F30021 | Ground fault | Check power cable connections. Check motor. Check brake connection cables and contacts. (page 301) |
| F30035 | Overtemperature, intake air | Check whether fan is running. Check fan filter elements. Check ambient temperature is in permissible range. (page 301) |
| F30036 | Overtemperature, inside area | Check whether fan is running. Check fan filter elements. Check ambient temperature is in permissible range. (page 301) |
| F07011 | Motor overtemperature | Reduce motor load. Check ambient temperature. Check wiring and connection of sensor at terminals 14–15. (page 297) |
| F07801 | Motor overcurrent | Check current limits (p0640). For vector control: check current controller (p1715, p1717). For U/f: check current limiting controller (p1340…p1346). Increase acceleration ramp (p1120) or reduce load. (page 298) |
| F07807 | Short-circuit detected | Check inverter connection on motor side for any phase-phase short-circuit. Rule out interchanged line and motor cables. (page 298) |
| F07900 | Motor blocked | Check that motor can run freely. Check torque limits (r1538 and r1539). Check “Motor blocked” parameters (p2175, p2177). (page 298) |
| F08501 | Setpoint timeout (PROFINET) | Check PROFINET connection. Set the controller into RUN mode. If fault occurs repeatedly, check monitoring time (p2044). (page 299) |
| A07400 | DC-link voltage maximum controller active | Increase ramp-down times. Deactivate Vdc_max control if not needed (p1240 = 0 for vector, p1280 = 0 for U/f). (page 298) |
| A05000–A05006 | Power Module overtemperature | Check ambient temperature, load conditions, duty cycle, and fan operation. (page 297) |
| A50001 | PROFINET configuration error | A PROFINET controller is attempting to connect with an incorrect configuration telegram. Check whether “Shared Device” is activated (p8929 = 2). (page 301) |
Acknowledging Faults
You have multiple options to acknowledge a fault (Operating Instructions, Section 11.4, page 291):
- Identify and resolve the root cause of the fault before clearing.
- Via operator panel: acknowledge using the BOP-2 or IOP.
- Via digital input: toggle the digital input assigned to “Acknowledge fault” (default DI 2, terminal 7 in default settings 7 and 12).
- Via PROFINET: set bit 7 in PROFIdrive control word 1 (r2090.7).
- Power cycle: switch the inverter power supply off and on again. Some faults detected during inverter-internal monitoring of hardware and firmware can only be acknowledged by power cycling.
- If the fault reappears immediately, the root cause has not been resolved.
6. Related G120 Control Units
The CU240B-2 and CU240E-2 Control Unit families, with order numbers from Operating Instructions, Table 3-1 and Table 3-2 (page 24). The CU240E-2 has an extended terminal strip and integrated safety functions compared to the CU240B-2.
| Order Number | Variant | Fieldbus | Safety Functions |
|---|---|---|---|
| 6SL3244-0BB00-1BA1 | CU240B-2 | USS, Modbus RTU | — |
| 6SL3244-0BB00-1PA1 | CU240B-2 DP | PROFIBUS DP | — |
| 6SL3244-0BB12-1BA1 | CU240E-2 | USS, Modbus RTU | Basic functions (STO) |
| 6SL3244-0BB13-1BA1 | CU240E-2 F | USS, Modbus RTU | Extended functions (STO, SS1, SLS) |
| 6SL3244-0BB12-1PA1 | CU240E-2 DP | PROFIBUS DP | Basic functions (STO) |
| 6SL3244-0BB13-1PA1 | CU240E-2 DP-F | PROFIBUS DP | Extended functions (STO, SS1, SLS) |
| 6SL3244-0BB12-1FA0 | CU240E-2 PN | PROFINET IO, EtherNet/IP | Basic functions (STO) — this guide |
| 6SL3244-0BB13-1FA0 | CU240E-2 PN-F | PROFINET IO, EtherNet/IP | Extended functions (STO, SS1, SLS) |
7. Related Guides
| Guide | Description |
|---|---|
| PowerFlex 525 Installation Guide | Allen-Bradley VFD installation — compare G120 with PowerFlex 525 architecture including terminal wiring and keypad commissioning. |
| ET 200SP DI 16x24VDC Guide | Siemens distributed I/O that connects to the same PROFINET network as the G120 CU240E-2 PN. |
Reference Documentation
The following Siemens publications were used as the source for all technical specifications in this guide. Every value in this guide was extracted directly from these documents — no AI memory was used for any technical data.
| Publication | Description | Download |
|---|---|---|
| G120 CU240B/E-2 Operating Instructions | SINAMICS G120 Converter with the CU240B-2 and CU240E-2 Control Units, Operating Instructions, Edition 04/2014, FW V4.7, A5E34259001B AA. Primary source for all hardware specs, terminal assignments, commissioning procedures, LED diagnostics, and fault codes. | |
| G120 CU240B-2/CU240E-2 List Manual | SINAMICS G120 Control Units CU240B-2/CU240E-2, List Manual, Edition 09/2020, FW V4.7 SP13, A5E33839529. Complete parameter descriptions and function diagrams. |
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