Delta DVP-SA2 User Manual

DVP-ES2/EX2/EC5/SS2/SA2/SX2/SE&TP Operation Manual - Programming
4-6
exception response will return to the master device. In the exception response, the most significant
bit of the original command code is set to 1, and an exception code explaining the condition that
caused the exception is returned.
An example of exception response of command code 01H and exception 02H:
Sent message:
Field Name
ASCII
Hex
STX
:
3A
Slave Address
01
30 31
Command code
01
30 31
Starting Address Hi
04
30 34
Starting Address Lo
00
30 30
Number of Points Hi
00
30 30
Number of Points Lo
10
31 30
Error Check (LRC)
EA
45 41
END
CR LF
0D 0A
Feedback message:
Field Name
ASCII
Hex
STX
:
3A
Slave Address
01
30 31
Function
81
38 31
Exception Code
02
30 32
Error Check (LRC)
7C
37 43
END
CR LF
0D 0A
Exception
code:
Explanation:
01
Illegal command code:
The command code received in the command message is invalid for PLC.
02
Illegal device address:
The device address received in the command message is invalid for PLC.
03
Illegal device content:
The data received in the command message is invalid for PLC.
07
1. Checksum Error
- Check if the checksum is correct
2. Illegal command messages
- The command message is too short.
- Length command message is out of range.

Delta DVP-SA2 Specifications

General

Brand	Delta
Model	DVP-SA2
Category	Controller
Language	English