Devicenet - Explicit Motor Analog Data Object (Class Code A2H, Services) - GE MM300 Manual
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
DeviceNet - Explicit Motor Analog Data Object (Class Code A2H,
Services)
4–70
Table 4-26: Explicit Motor Analog Data Object, Class Code A2h, Services:
CODE
SERVICES AVAILABLE TO THIS OBJECT
NAME
0x0E
Get_Attribute_Single
Table 4-27: Explicit Motor Analog Data Object, Class Code A2h, Attributes:
ATTRIBUTE NO.
DESCRIPTION
(HEX VALUE)
1
Phase A current
2
Phase B current
3
Phase C current
4
Average Phase current
5
Ground Current
6
Motor Load
7
Current Unbalance
8
Vab
9
Vbc
A
Vca
B
Average Line Voltage
C
Van
D
Vbn
E
Vcn
F
Va1 angle
10
Vb1 angle
11
Vc1 angle
12
System Frequency
13
Power factor
14
Real Power
15
Reactive Power
16
Apparent Power
17
MWh Consumption
18
Mvarh Consumption
19
Hottest Stator RTD
1A
Hottest Stator RTD Temp
1B
RTD 1 Temperature
1C
RTD 2 Temperature
1D
RTD 3 Temperature
1E
RTD 4 Temperature
1F
RTD 5 Temperature
20
RTD 6 Temperature
21
Learned Acceleration Time
22
Learned Starting Current
23
Learned Starting Capacity
24
Learned Average Motor Load
25
Number of motor starts
DESCRIPTION
Returns the contents of the given attribute
UNIT
Amps
Amps
Amps
Amps
Amps
%
%
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Degree
Degree
Degree
Hz
None
Kw
Kvar
Kva
Mwh
Mvarh
None
Deg C
Deg C
Deg C
Deg C
Deg C
Deg C
Deg C
Secs
Amps
%
%FLA
None
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
CHAPTER 4: FIELDBUS INTERFACE
FORMAT
SIZE IN
CODE
BYTES
F10
4
F10
4
F10
4
F10
4
F10
4
F1
2
F1
2
F1
2
F1
2
F1
2
F1
2
F1
2
F1
2
F1
2
F1
2
F1
2
F1
2
F3
2
F21
2
F13
4
F13
4
F2
2
F17
4
F17
4
F1
1
F4
2
F4
2
F4
2
F4
2
F4
2
F4
2
F4
2
F2
2
F10
4
F1
2
F3
2
F1
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