GE MM300 Manual page 72

Motor management system/low voltage motor protection and control
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FORMAT CODES
2–64
Code
Type
Bit 7
FC188
32 bits
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
FC189
32 bits
FC190
32 bits
FC191
32 bits
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
Bit 10
Bit 11
Bit 12
Bit 13
Bit 14
Bit 15
Bit 16
Bit 17
Bit 18
Bit 19
Bit 20
Bit 21
Bit 22
Bit 23
Bit 24
Bit 25
Bit 26
CHAPTER 2: RS485 INTERFACE (MODBUS RTU)
Definition
FLA Too High
Message Status 2
Internal Temperature High
IO Communication Failure
Metering Failure
Order Code Error
Clock Error
Calibration Error
EEPROM Error
IO Input Read Error
IO 3.3V Error
IO 5V Error
IO -5V Error
IO Input Overvoltage
IO Frequency Error
DPRAM Error
System Health Error
Message Status 3 (Reserved)
Message Status 4 (Reserved)
Ctrl Element Status 1
Any Stop
Thermal Inhibit
AutoMode
Manual Mode
AutoManualMode
Restart Inhibit
Contactor A
Contactor B
Forward Limit
Reverse Limit
Starts/Hr Inhibit
Time Between Inhibit
Level 1 Access
Level 2 Access
Level 3 Access
Comms Ctrl Active
Hard Wired Ctrl Active
Field Ctrl Active
MCC Ctrl Active
Process ILock A Stop
Process ILock B Stop
Process ILock C Stop
Process ILock D Stop
Process ILock E Stop
Process ILock F Stop
Process ILock G Stop
Process ILock H Stop
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE

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Questions and answers

Kristiyan
March 31, 2025

we have a problem with device MM300. it says that the device is invalid through the software and does not read the device. the communication is through RS 485. is it possible to give us an advice or send us some reccomendations or instructions?

1 comments:
Mr. Anderson
March 31, 2025

For a GE MM300 device that is not recognized by software and communicates via RS485, follow these troubleshooting steps:

1. Ensure correct RS485 wiring:
- Use two-wire RS485 in a daisy chain configuration.
- Install a 120 Ohm resistor in series with a 1 nF ceramic capacitor at each end of the link.
- Use shielded wire and ground the shield at only one location.

2. Check device addressing and termination:
- Confirm proper device address and ensure no address conflicts.
- Verify that termination networks are correctly installed at both ends.

3. Confirm half-duplex communication:
- Ensure that the system supports half-duplex communication and not sending and receiving data simultaneously.

4. If using USB for setup (e.g., USB-to-RS485 converter) and the device is not recognized:
- Repeat the connection procedure 2–3 times.
- If still not recognized, uninstall the USB driver from Device Manager under modems.
- Disconnect the USB cable, wait at least 10 seconds, then reconnect.
- When prompted by the Hardware Wizard, select "No, not this time," then "Install the software automatically," and press "Continue Anyway."
- Finish the installation and check if the USB device appears in the setup software.

These steps help ensure proper hardware connection and correct software recognition of the MM300 device.

This answer is automatically generated

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