KEYENCE BL-600 Series - Manual (Page 124)

Chapter 7 Serial Communication
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7.3 Command Communication
The BL-600 includes commands to directly operate the BL-600 (direct control
commands) and the commands used to change or confirm the BL600’s settings
(parameter setting commands).
7.3.1 Setup of direct control commands
Communication procedure
1. Send a direct control command from the PC to the BL-600.
2. After receiving a command, the BL-600 Series sends back an OK response and
executes the required operation.
* The BL-600 Series does not send back a response for the read operation
and test mode control commands.
* When an incorrect command is sent to the BL-600, the BL-600 sends back
no response.
Communication format
When the command format is [Command][CR], the response format is
[Response][CR]. When the command format is [STX][Command][ETX], the
response format is [STX][Response][ETX].
* <LF> can be added after the command being sent. In this case, however, <LF>
is not added to the response data.
Note 1: When <ESC> is inserted before the command being sent, characters in
the BL-600’s command receiving buffer are cleared.
Note 2: If the BL-600’s command receiving buffer contains erroneous characters
due to data transmission error during communication, add <ESC> to the command
being sent.
Note 3: For command communication, set the time duration between transmission
of each character (byte) to up to 30 seconds. If this duration exceeds 30 seconds,
the BL-600 cancels the received characters.
Command Response
Command CR Response CR
STX Command ETX STX Response ETX
LA SE R ON OK/NG TIM ING
TEST
BL-600
Command
Response