KEYENCE LS-7000 - Manual (Page 148)

7-6
Chapter 7 RS-232C
7
Outline of Command Formats
When LS-7000 Series receives a command from the external device, the LS-7000 Series
will respond to the received command and return a response to the external device. The
following section provides information on respective command formats.
Note: When you write a control program, check that the program will enable the
external device to send the next command after the external device confirms
the response from the LS-7000 Series.
■ Connection to a PC/PLC Link Unit
■ Connection to KV-10/80 series
LS
Command
Response
Command format cr
Response format cr
STX Command format
STX Response format
LS
Command
Response
ETX
ETX
The Cr character is appended to the com-
mands and responses.
The STX+ETX characters are used to insert
a delimiter each to the command and
response formats.
■ Outline of Command Formats
The following typical examples of command formats are explained below.
• Command format
• Response format
• Error response format
Command Format
Main command
, , ,
Identifier 1 Identifier 2 Identifier 3
[ ] [ ] ] [
Response Format
The received main command or identifier will be
added as the header.
, , , [ ] [ ] ] [
Error Response Format
Main command
E R , , Error number
00: Command error
01: Command error due to operational problem
06: Delimiter error at the time of PLC selection
20: Data length error
21: Error in the number of data items
22: Data value overrange
88: Time-out error
99: Others