GE MM300 Manual page 30
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
40132
0083
Command Data 2
40133
0084
Command Data 3
40134
0085
Command Data 4
40135
0086
Command Data 5
40136
0087
Command Data 6
40137
0088
Command Data 7
40138
0089
Command Data 8
40139
008A
Command Data 9
40140
008B
Command Data 10
40141
008C
Reserved
▼
▼
▼
40171
00AA
Reserved
COMMUNICATION SETTINGS
40172
00AB
Slave Address
40173
00AC
RS485 Baud Rate
40174
00AD
RS485 Parity
40175
00AE
Reserved
40176
00AF
Reserved
40177
00B0
Reserved
40178
00B1
DeviceNet MAC ID
40179
00B2
DeviceNet Baud Rate
40180
00B3
Reserved
40181
00B4
NTP IP Address
40183
00B6
Ethernet IP address
40185
00B8
Ethernet subnet mask
40187
00BA
Ethernet gateway address
40189
00BC
Reserved
40190
00BD
Reserved
40191
00BE
Reserved
40192
00BF
Profibus address
40193
00C0
Profibus Baud Rate
40194
00C1
FieldBus Map Entries
40195
00C2
Reserved
▼
▼
▼
40227
00E2
Reserved
REAL-TIME CLOCK/DAYLIGHT SAVINGS
40228
00E3
Set Date
40230
00E5
Set Time
40232
00E7
Time Offset From UTC
40233
00E8
Reserved
40234
00E9
Daylight Savings
40235
00EA
DST Start Month
40236
00EB
DST Start Week
40237
00EC
DST Start Weekday
40238
00ED
DST End Month
40239
00EE
DST End Week
2–22
Min
Max
Step
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
0
0xFFFF
0
---
---
---
▼
▼
▼
1
254
1
0
4
1
0
2
1
---
---
---
---
---
---
---
---
---
0
63
1
0
2
1
---
---
---
0
0xFFFFFFFF 1
0
0xFFFFFFFF 1
0
0xFFFFFFFF 1
0
0xFFFFFFFF 1
---
---
---
---
---
---
---
---
---
1
125
1
1
0x07E2
1
0
95
1
---
---
---
▼
▼
▼
0
0X0C1F082E 0
0
0X173B3B63 0
-2400
2400
25
---
---
---
0
1
1
0
12
1
0
5
1
0
7
1
0
12
1
0
5
1
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 2: RS485 INTERFACE (MODBUS RTU)
Units
Format Default
F1
0
F1
0
F1
0
F1
0
F1
0
F1
0
F1
0
F1
0
F1
0
---
---
---
▼
▼
▼
---
F1
254
---
FC101
4
FC102
0
---
---
---
---
---
---
---
---
---
---
F1
63
---
FC156
0
---
---
---
FC150
0
FC150
0
FC150
0xFFFFFC00 2
FC150
0
---
---
---
---
---
---
---
---
---
---
F1
125
FC155
0x07E2
F1
0
---
---
---
▼
▼
▼
F18
0
F19
0
hrs
F6
0
---
---
---
---
FC126
0
---
FC169
0
---
FC170
0
---
FC171
0
---
FC169
0
---
FC170
0
Size in
Words
1
1
1
1
1
1
1
1
1
1
▼
1
1
1
1
1
1
1
1
1
1
2
2
2
1
1
1
1
1
1
1
▼
1
2
2
1
1
1
1
1
1
1
1
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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