GE MM300 Manual page 28
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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MODBUS MEMORY MAP
Modbus
Hex
Description
30821
334
Sample Index + Trace Memory
Sample102
30822
335
Sample Index + Trace Memory
Sample103
30823
336
Sample Index + Trace Memory
Sample104
30824
337
Sample Index + Trace Memory
Sample105
30825
338
Sample Index + Trace Memory
Sample106
30826
339
Sample Index + Trace Memory
Sample107
30827
33A
Sample Index + Trace Memory
Sample108
30828
33B
Sample Index + Trace Memory
Sample109
30829
33C
Sample Index + Trace Memory
Sample110
30830
33D
Sample Index + Trace Memory
Sample111
30831
33E
Sample Index + Trace Memory
Sample112
30832
33F
Sample Index + Trace Memory
Sample113
30833
340
Sample Index + Trace Memory
Sample114
30834
341
Sample Index + Trace Memory
Sample115
30835
342
Sample Index + Trace Memory
Sample116
30836
343
Sample Index + Trace Memory
Sample117
30837
344
Sample Index + Trace Memory
Sample118
30838
345
Sample Index + Trace Memory
Sample119
30839
346
Sample Index + Trace Memory
Sample120
30840
347
Sample Index + Trace Memory
Sample121
30841
348
Sample Index + Trace Memory
Sample122
30842
349
Sample Index + Trace Memory
Sample123
30843
34A
Sample Index + Trace Memory
Sample124
30844
34B
Sample Index + Trace Memory
Sample125
30845
34C
Sample Index + Trace Memory
Sample126
30846
34D
Sample Index + Trace Memory
Sample127
30847
34E
Sample Index + Trace Memory
Sample128
30951
03B6
Reserved
STATUS BUFFER
2–20
Min
Max
Step
-32767
32767
1
-32767
32767
1
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32767
1
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32767
1
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32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
-32767
32767
1
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 2: RS485 INTERFACE (MODBUS RTU)
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F4
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F4
0
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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