6SE7031-2EP85-0AA0 SIMOVERT MASTERDRIVES

SKU: 6SE7031-2EP85-0AA0 Category: Drive

Description
Additional information

The Siemens SIMOVERT MASTERDRIVES 6SE7031-2EP85-0AA0 is a vector control AC drive unit belonging to the SIMOVERT MASTERDRIVES MC (Motion Control) and VC (Vector Control) series. This unit is designed for demanding variable-speed drive applications requiring precise speed and torque control of three-phase induction and synchronous motors. The 6SE7031-2EP85-0AA0 is a compact inverter unit intended for cabinet or panel mounting in industrial environments.

The 6SE7031-2EP85-0AA0 operates on a three-phase 380–480 V AC supply and delivers a continuous output current of 90 A, corresponding to a power rating of approximately 45 kW. It supports multiple control modes including sensorless vector control and closed-loop field-oriented control with encoder feedback. The unit features a CUVC or compatible control board with serial communication interfaces including USS protocol over RS-485, and optionally PROFIBUS-DP via plug-in communication boards. Parameterization and diagnostics are accessible via the PMU operator panel or an external PC tool (DriveMonitor/STARTER). The drive incorporates integrated DC bus connection capability, enabling energy exchange between multiple drive units in a common DC bus configuration.

The SIMOVERT MASTERDRIVES series is widely deployed in machine tools, rolling mills, paper and printing machinery, textile production lines, cranes and hoists, and conveyor systems. The 6SE7031-2EP85-0AA0 is particularly suited to applications demanding high dynamic response, precise torque control, and coordinated multi-axis operation. Its modular architecture and common DC bus support make it a practical choice for multi-drive installations where regenerative energy recovery and coordinated motion are required.

Technical Specifications

Input Voltage	380–480 V AC (3-phase)
Output Current (Continuous)	90 A
Power Rating	45 kW
Control Type	Vector Control (sensorless and closed-loop field-oriented)
DC Bus Voltage	510–650 V DC
Switching Frequency	2.5–16 kHz (adjustable)
Communication Interface	USS (RS-485); PROFIBUS-DP (optional via plug-in board)
Feedback Interface	Incremental encoder (HTL/TTL) via optional encoder board
Operating Temperature	0 °C to +40 °C (derated up to +50 °C)
Storage Temperature	-25 °C to +70 °C
Relative Humidity	≤ 95 % (non-condensing)
IP/Protection Rating	IP20
Mounting	Cabinet/panel mounting
Series/Product Family	SIMOVERT MASTERDRIVES
Certifications	CE, UL

Common Fault Codes

F001: Overcurrent: Output current has exceeded the permissible limit, typically caused by a short circuit, motor fault, or excessively fast acceleration ramp.
Check motor wiring for short circuits, verify motor data parameters, and extend the acceleration ramp time (P462/P464). Inspect output IGBTs.
F002: Overvoltage: DC bus voltage has exceeded the maximum permissible level, often due to regenerative energy during deceleration.
Extend the deceleration ramp time (P464), check the braking resistor or chopper module, and verify supply voltage levels.
F003: Undervoltage: DC bus voltage has dropped below the minimum threshold, indicating a supply voltage dip or phase loss.
Check the incoming supply voltage and all three input phases. Verify line fuses and input contactor operation.
F004: Drive Overtemperature: The heatsink or internal temperature has exceeded the permissible limit.
Check cooling fan operation, clean heatsink fins, verify ambient temperature is within specification, and check that ventilation clearances are maintained.
F008: Motor Overtemperature: The motor thermal model or PTC/KTY sensor has detected excessive motor temperature.
Check motor load conditions, verify motor cooling, and check PTC/KTY sensor wiring and parameter settings (P381/P382).
F011: Line Phase Failure: One or more input supply phases are missing or have an unacceptable voltage imbalance.
Check all three input supply phases, line fuses, and input contactor contacts. Measure phase-to-phase voltages at the drive input terminals.
F015: Motor Phase Failure: An open circuit has been detected in one of the motor output phases.
Check motor cable connections at the drive output terminals and at the motor terminal box. Verify motor winding continuity with a multimeter.
F025: EEPROM/Parameter Fault: A checksum error or data corruption has been detected in the parameter memory.
Perform a factory reset (P970 = 1) and re-enter all drive parameters. If the fault persists, the control board (CUVC) may require replacement.

Frequently Asked Questions

What is the continuous output current and power rating of the 6SE7031-2EP85-0AA0?

The 6SE7031-2EP85-0AA0 provides a continuous output current of 90 A, corresponding to a motor power rating of approximately 45 kW at 380–480 V AC.

What communication protocols does the SIMOVERT MASTERDRIVES 6SE7031-2EP85-0AA0 support?

The unit natively supports the USS protocol over RS-485. PROFIBUS-DP communication can be added by installing an optional CBP2 plug-in communication board into the control board slot.

Can this drive be connected to a common DC bus with other SIMOVERT MASTERDRIVES units?

Yes, the 6SE7031-2EP85-0AA0 supports common DC bus operation, allowing multiple inverter units to share a DC bus supplied by a central rectifier or infeed unit, enabling energy exchange between drives.

What encoder types are supported for closed-loop vector control?

The drive supports incremental encoders with HTL and TTL signal levels via an optional encoder evaluation board (e.g., SBP or equivalent) installed on the control board.

Which parameterization tools are compatible with this drive?

The drive can be parameterized using the integrated PMU operator panel, or via a PC running Siemens DriveMonitor or STARTER software connected through the serial interface.

Troubleshooting

Drive displays F001 overcurrent fault immediately on start

Check for short circuits in the motor cable or motor windings using an insulation resistance tester. Verify that motor nameplate data has been correctly entered into the drive parameters.

Repair or replace faulty motor cable or motor. Correct motor data parameters (P100–P115). If the fault persists with no motor connected, the output IGBT module may be damaged and require replacement.

Drive powers up but display shows no output and the motor does not run

Check that the enable signal (terminal 28 or equivalent) and the run command are correctly applied. Verify that no fault or alarm is active and that the drive is in the correct operating mode.

Apply the correct enable and setpoint signals per the wiring diagram. Clear any active faults by cycling power or issuing a fault reset command. Confirm parameter P100 (control mode) and P554 (source of enable) are set correctly.

Heatsink overtemperature fault (F004) occurs under normal load conditions

Inspect the cooling fan for operation and airflow obstruction. Measure ambient temperature inside the cabinet. Check that the heatsink fins are not clogged with dust or debris.

Clean the heatsink fins and replace the cooling fan if it is not running. Ensure cabinet ventilation is adequate and ambient temperature does not exceed 40 °C. Derate the drive if operating above 40 °C.

PROFIBUS communication loss between drive and PLC

Check the PROFIBUS cable connections at the CBP2 board and at the PLC. Verify bus termination resistors are correctly installed at both ends of the PROFIBUS segment. Check the drive's PROFIBUS address parameter.

Reseat the CBP2 communication board. Correct the PROFIBUS node address (P918) to match the PLC configuration. Ensure proper bus termination and cable shielding. Replace the CBP2 board if the fault persists.

Drive trips on F002 overvoltage during deceleration

The DC bus voltage is rising above the trip threshold during motor deceleration, indicating insufficient braking capacity. Check whether a braking chopper and resistor are installed and functioning.

Extend the deceleration ramp time in parameter P464. If fast deceleration is required, install or verify the operation of a braking chopper module and correctly sized braking resistor. Check braking resistor connections and resistance value.

Condition	Repair, Used, Refurbished, New in box (sealed)