GE MM300 Manual page 33
Motor management system/low voltage motor protection and control
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Also See for MM300:
- Instruction manual (198 pages) ,
- Quick start manual (77 pages) ,
- Installation recommendations (21 pages)
Table of Contents
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CHAPTER 2: RS485 INTERFACE (MODBUS RTU)
Modbus
Hex
Description
40411
019A
IL E Running Override
40412
019B
IL E Healthy State
40413
019C
Reserved
▼
▼
▼
40417
01A0
Reserved
40418
01A1
IL F Name
40428
01AB
IL F Function
40429
01AC
IL F Inst Alarm
40430
01AD
IL F Startup Override
40431
01AE
IL F Running Override
40432
01AF
IL F Healthy State
40433
01B0
Reserved
▼
▼
▼
40437
01B4
Reserved
40438
01B5
IL G Name
40448
01BF
IL G Function
40449
01C0
IL G Inst Alarm
40450
01C1
IL G Startup Override
40451
01C2
IL G Running Override
40452
01C3
IL G Healthy State
40453
01C4
Reserved
▼
▼
▼
40457
01C8
Reserved
40458
01C9
IL H Name
40468
01D3
IL H Function
40469
01D4
IL H Inst Alarm
40470
01D5
IL H Startup Override
40471
01D6
IL H Running Override
40472
01D7
IL H Healthy State
40473
01D8
Reserved
▼
▼
▼
40477
01DC
Reserved
40478
01DD
IL I Name
40488
01E7
IL I Function
40489
01E8
IL I Inst Alarm
40490
01E9
IL I Startup Override
40491
01EA
IL I Running Override
40492
01EB
IL I Healthy State
40493
01EC
Reserved
▼
▼
▼
40497
01F0
Reserved
40498
01F1
IL J Name
40508
01FB
IL J Function
40509
01FC
IL J Inst Alarm
40510
01FD
IL J Startup Override
40511
01FE
IL J Running Override
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
Min
Max
Step
0
3601
1
0
1
1
---
---
---
▼
▼
▼
---
---
---
0
10
1
0
3
1
0
1
1
0
3600
1
0
3601
1
0
1
1
---
---
---
▼
▼
▼
---
---
---
0
10
1
0
3
1
0
1
1
0
3600
1
0
3601
1
0
1
1
---
---
---
▼
▼
▼
---
---
---
0
10
1
0
3
1
0
1
1
0
3600
1
0
3601
1
0
1
1
---
---
---
▼
▼
▼
---
---
---
0
10
1
0
3
1
0
1
1
0
3600
1
0
3601
1
0
1
1
---
---
---
▼
▼
▼
---
---
---
0
10
1
0
3
1
0
1
1
0
3600
1
0
3601
1
MODBUS MEMORY MAP
Units
Format Default
*
s
F1
0
---
FC116
1
---
---
---
▼
▼
▼
---
---
---
---
F22
9
---
FC140
0
---
FC126
0
s
F1
0
*
s
F1
0
---
FC116
1
---
---
---
▼
▼
▼
---
---
---
---
F22
10
---
FC140
0
---
FC126
0
s
F1
0
*
s
F1
0
---
FC116
1
---
---
---
▼
▼
▼
---
---
---
---
F22
11
---
FC140
0
---
FC126
0
s
F1
0
*
s
F1
0
---
FC116
1
---
---
---
▼
▼
▼
---
---
---
---
F22
12
---
FC140
0
---
FC126
0
s
F1
0
*
s
F1
0
---
FC116
1
---
---
---
▼
▼
▼
---
---
---
---
F22
13
---
FC140
0
---
FC126
0
s
F1
0
*
s
F1
0
Size in
Words
1
1
1
▼
1
10
1
1
1
1
1
1
▼
1
10
1
1
1
1
1
1
▼
1
10
1
1
1
1
1
1
▼
1
10
1
1
1
1
1
1
▼
1
10
1
1
1
1
2–25
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Table of Contents
Need help?
Do you have a question about the MM300 and is the answer not in the manual?
Questions and answers
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?
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