Status Retrieval; Data Retrieval - Emerson Digistart CS User Manual

6.2

Status retrieval

Soft starter status can be retrieved using the following format:
Figure 6-2 Status retrieval format
Send
address
Possible error responses:
=
Request
Trip code
Starter status
6.3

Data retrieval

Data can be retrieved from the soft starter using the following format:
Figure 6-3 Data retrieval format
Send
address
Possible error responses:
=
Request ASCII
Motor current D10
Motor D12
temperature
Modbus Module User Guide
Issue 1
ACK
Master
ASCII
C18 See the trip code table.
C22 Bit
0 to 3
4
5
6
7
ACK
Master
Requests motor current. The data is four byte decimal ASCII. Minimum value 0000 A, maximum
value 9999 A.
Requests the calculated value of the motor thermal model as a % of motor thermal capacity. The
data is four byte decimal ASCII. Minimum value is 0000%. Trip point is 0105%.
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Send
request
= Slave
(soft starter)
Receive Status (ssss)
Description
1 = Ready
2 = Starting
3 = Running
4 = Stopping (including braking)
5 = Restart delay (including Temperature check)
6 = Tripped
7 = Program mode
1 = Positive phase sequence (only valid if bit 6 = 1)
1 = Current exceeds FLC
0 = Uninitialised
1 = Initialised
0 = Communications are OK
1 = Communications device fault
Send
request
= Slave
(soft starter)
Receive Data (dddd)
Receive
status
NAK (Invalid LRC)
Receive
data
NAK (Invalid LRC)
11