SMC Networks LECSB2-T Series User Manual

14. COMMUNICATION FUNCTION
14 - 11
14.3.8 Communication procedure example
The following example reads the set value of alarm history (last alarm) from the driver of station 0.
Data item
Value
Description
Station No.
0
Driver station 0
Command
3 3
Reading command
Data No.
1 0
Alarm history (last alarm)
Data = [0]
= [0] [3] [3]
Transmission data =
Other than error code
[A] or [a]?
3 consecutive times?
300 ms elapsed?
Start
Data make-up
Checksum calculation and
addition
Addition of SOH to make up
transmission data
Data transmission
Data receive
3 consecutive times?
Receive data analysis
End
100 ms after EOT transmission
Error processingError processing
No
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Master station
Is there receive data?
Command Data No.
Checksum = 30H + 33H + 33H + 02H + 31H + 30H + 03H =
46H 43H
Station No.
Slave station
Master station Slave station
Master station Slave station
ETXSTX
ETXSTX33 1 0
+ + +
+
ETXSOH 0STX33 1 CF0+ + + + + +
FCH
[1] [0]

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English