KEYENCE Visual KV Series - Manual (Page 298)

7.6 Display Interface Mode Programming KV-300 Series Only
KV
-300
KV-10/80
Chapter 7 KV-L2 Serial Interface Module
1-274
7
Note 1: When several commands are being sent in succession, send the delimiter
(CR) of the current command before sending the succeeding command. Set the
delimiter timeout to at least 2 seconds.
Host computer
Station no.
Header code
Text FCS
Delimiter
Station no.
Header code
Text FCS
Terminator
Station no.
Header code
Text FCS
Delimiter
Station no.
Header code
Text FCS
Terminator
Text FCS
Delimiter
Text FCS
Terminator
Text FCS
Terminator
Text FCS
Delimiter
Delimiter Delimiter
Delimiter Delimiter
Host computer
KV-L2
KV-L2
First command Intermediate command Last command
First command Intermediate command Last command
Next transmission
OK
Next transmission
OK
Next transmission
OK
Next transmission
OK
Command
Response
Note 2: When several divided responses are being received, send a delimiter (CR)
to the KV-L2 after receiving the first delimiter from the KV-L2. This enables the KV-
L2 to send the next response; otherwise, your personal computer will not receive the
next response from the KV-L2.
Note 3: The FCS (frame check sequence) is a method of detecting communication
errors. An 8-bit exclusive OR from the top of the command/response to the last
character of the text is converted to 2-character ASCII code.
KVHKA Chap 07_5to10.p65 08.3.11, 11:18 AM 274