Automationdirect.com Stellar SR44, User Manual

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Chapter 6: Serial Communications
6.7.1 – CLICK PLC Example Program (continued)
9
When "Stop PB" C22 is pressed (activated), a value of "8" (Stop) is copied to DS30, and C23 is set.
This will activate the Send instruction, which will write the contents of DS30 to P124.
When the "Stopping" or "Stopped" bits (read from the unit) turn on, the "Stop" sequence is reset.
Copy
Src
Des
Single
i
8
i
DS30
Stop PB
b
C22
SET
Stop SoftStart
b
C23
RST
Stop SoftStart
b
C23
10
Stopping
b
C107
Stopped
b
C100
Start PB
b
C22
Enable Time
Comm
b
C11
Receiving
Success
Error
ErrCode
P11 and P12 from Strtr
h
DH10
Receive
(Port3)
Slave ID
Modbus Function Code
Slave Addr
NO. of Master Addresses
Word Swap
MODBUS
1
03
400012
1
OFF
Master
Time Comm
Receiving
b
C206
Status Comm
Success
b
C207
Status Comm Read
Error
b
C208
_Port_2_
Ready_Flag
b
SC100
11
The next 2 rungs Receive and Send P12 (Soft Start Time) to the unit. This is complex because
2 hex values are actually retrieved (P11 and P12) by reading 1 Modbus address. The 2 rungs will
synch themselves and communicate until the value that is sent to the unit is also confirmed by
being read back from the unit. Once that occurs, the sequence resets.
Time Comm
Receiving
b
C206
Time Comm
Success
b
C207
i
DS102
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019
6–22