GE MM300 Manual page 146
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)
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DEVICENET PROTOCOL
4–68
ATTRIBUTE
DESCRIPTION
(HEX VALUE)
35
Ground Alarm Level
36
CBCT Ground Alarm Level
37
Ground Alarm Delay On
Start
38
Ground Trip Level
39
CBCT Ground Trip Level
3A
Ground Trip Delay On Start Seconds
3B
Ground Alarm Delay On Run Seconds
3C
Ground Trip Delay on Run
3D
Reserved
3E
Reserved
3F
Reserved
40
Reserved
41
Reserved
42
Reserved
43
Current Cutoff Level
44
UV Restart Inhibit
45
Lockout Reset
46
Access Switch
47
Field Permissive
48
Comms Permissive
49
Forward Limit
4A
Reverse Limit
4B
Remote Reset
4C
MCC Permissive
4D
Hard Wired Start A
4E
Hard Wired Start B
4F
Hard Wired Stop
50
Hard Wired Permissive
51
Field Start A
52
Field Start B
53
Field Stop
54
Contactor Status A
55
Contactor Status B
56
Auto/Manual Switch
57
Test Switch
58
Process Interlock A
59
Process Interlock B
5A
Self Test Action
5B
Comms Start Cntrl
5C
Comms Stop Mode
5D
Hard Wired Start Ctrl
5E
Hard Wired Stop Mode
5F
Hard Wired Stop Actn
60
Hard Wired 2W/3W
UNIT
FORMA
T CODE
PercentFLA F1B
Amps
F2B
Seconds
F1
PercentFLA F1B
Amps
F2B
F2
F1
Seconds
F2
Amps
F2
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC142
None
FC111
None
FC126
None
FC172
None
FC126
None
FC172
None
FC174
None
FC173
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 4: FIELDBUS INTERFACE
MI
MAX
FACTOR
SIZE IN
N
Y
BYTES
DEFAUL
T
10
101
101
2
5
151
151
2
0
60
10
2
10
101
101
2
5
151
151
2
0
100
0
2
0
60
10
2
0
50
0
2
0
10
2
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
0xE000 0
2
0
1
0
2
0
1
0
2
0
1
0
2
0
1
0
2
0
1
0
2
0
1
0
2
0
1
1
2
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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