GE MM3 Instruction Manual page 204

B.1 MM3 FAQ
Verify the following:
A
1. if master communicating with Modbus® RTU protocol
2. wiring between interface device and MM3
3. MM3 communications address
4. master polling address
B
5. MM3 baud rate
6. master baud rate
7. MM3 parity setpoint
8. master parity settings
If the problem persists, call GE Power Management for technical support.
Q
Can the MM3 interface with an external analog device?
Yes. The MM3 has a single analog input that can be used to monitor an external transducer. Alarm
A
and trip setpoints can be configured to warn the user or shut down the motor.
Q
Can the MM3 be used on medium voltage motors?
No. The MM3 was designed specifically for the low voltage market (600 V or less). The protection
A
features offered in the MM3 are typically not advanced enough for larger, more expensive motors.
The power measuring will only accommodate 600 V systems.
Q
Can the START keys on the faceplate of the MM3 be disabled?
Yes. One of the programmable switch inputs can be configured to REMOTE PERMISSIVE and a
A
jumper placed from Switch Common to permanently energize that switch input. This will allow starts
from the switch inputs of the MM3 only, when in the MANUAL mode.
B-2 MM3 Motor Manager 3
APPENDIX B
GE Power Management