GE MM300 Manual page 113
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 4: FIELDBUS INTERFACE
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
Byte
209
36
210
36
211
36
212
36
213
36
214
36
215
36
216
37
217
37
218
37
219
37
220
37
221
37
222
37
223
37
224
38
225
38
226
38
227
38
228
38
229
38
230
38
231
38
232
39
233
39
234
39
235
39
236
39
237
39
238
39
239
39
240
40
241
40
242
40
243
40
244
40
245
40
246
40
247
40
248
41
249
41
250
41
251
41
252
41
253
41
Bit
GSE Bit #
1
233
Reserved
2
234
Reserved
3
235
Reserved
4
236
Reserved
5
237
Reserved
6
238
Reserved
7
239
Reserved
0
240
Reserved
1
241
Reserved
2
242
Reserved
3
243
Reserved
4
244
Reserved
5
245
Reserved
6
246
Reserved
7
247
Reserved
0
248
Reserved
1
249
Reserved
2
250
Reserved
3
251
Reserved
4
252
Reserved
5
253
Reserved
6
254
Reserved
7
255
Reserved
0
256
Reserved
1
257
Reserved
2
258
Reserved
3
259
"Comm Stop"
4
260
"Fuse Fail Inhibit"
5
261
"Phase Reversal Inhibit"
6
262
"Low Aux Voltage Inhibit"
7
263
"UV Restart Inhibit"
0
264
Reserved
1
265
Reserved
2
266
Reserved
3
267
Reserved
4
268
"UV Restart"
5
269
Reserved
6
270
Reserved
7
271
Reserved
0
272
Reserved
1
273
Reserved
2
274
Reserved
3
275
Reserved
4
276
Reserved
5
277
Reserved
PROFIBUS DPV1
Ext.
Diag
Byte
30
30
30
30
30
30
30
31
31
31
31
31
31
31
31
32
32
32
32
32
32
32
32
33
33
33
33
33
33
33
33
34
34
34
34
34
34
34
34
35
35
35
35
35
35
4–35
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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