GE MM300 Manual page 29
Motor management system/low voltage motor protection and control
Hide thumbs
Also See for MM300:
- Instruction manual (198 pages) ,
- Quick start manual (77 pages) ,
- Installation recommendations (21 pages)
Table of Contents
Advertisement
CHAPTER 2: RS485 INTERFACE (MODBUS RTU)
Modbus
Hex
Description
30952
03B7
Alarm Status 4
30954
03B9
Alarm Status 3
30956
03BB
Alarm Status 2
30958
03BD
Alarm Status 1
30960
03BF
Trip Status 4
30962
03C1
Trip Status 3
30964
03C3
Trip Status 2
30966
03C5
Trip Status 1
30968
03C7
Message Status 4
30970
03C9
Message Status 3
30972
03CB
Message Status 2
30974
03CD
Message Status 1
30976
03CF
Ctrl Element Status 4
30978
03D1
Ctrl Element Status 3
30980
03D3
Ctrl Element Status 2
30982
03D5
Ctrl Element Status 1
30984
03D7
Reserved
30985
03D8
Reserved
30986
03D9
Reserved
FLEXLOGIC
30987
03DA
Element Flag
31371
055A
Program Status
31372
055B
Flex Lines Used
31373
055C
Error Line
31374
055D
Reserved
31375
055E
Reserved
31376
055F
Reserved
31377
0560
Reserved
COMMUNICATION
31378
0561
Serial Status
31379
0562
Ethernet Status
31380
0563
Profibus Status
31381
0564
DeviceNet Status
31382
0565
Reserved
▼
▼
▼
32272
08DF
Reserved
SETPOINTS
COMMANDS
40001
0000
Reserved
▼
▼
▼
40128
007F
Reserved
40129
0080
Command address
40130
0081
Command Function
40131
0082
Command Data 1
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
Min
Max
Step
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
▼
▼
▼
---
---
---
▼
▼
▼
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
MODBUS MEMORY MAP
Units
Format Default
---
FC182
N/A
---
FC181
N/A
---
FC180
N/A
---
FC179
N/A
---
FC186
N/A
---
FC185
N/A
---
FC184
N/A
---
FC183
N/A
---
FC190
N/A
---
FC189
N/A
---
FC188
N/A
---
FC187
N/A
---
FC194
N/A
---
FC193
N/A
---
FC192
N/A
---
FC191
N/A
---
---
---
---
---
---
---
---
---
---
FC145
N/A
---
FC109
N/A
---
F1
N/A
---
F1
N/A
---
---
---
---
---
---
---
---
---
---
---
---
---
FC112
N/A
---
FC112
N/A
---
FC112
N/A
---
FC112
N/A
---
---
---
▼
▼
▼
---
---
---
▼
▼
▼
F1
0
F1
0
F1
0
Size in
Words
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
384
1
1
1
1
1
1
1
1
1
1
1
1
▼
1
1
▼
1
1
1
1
2–21
Hide quick links:
Advertisement
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