KEYENCE BL-700 Series - Manual (Page 102)

Chapter 5 Serial Communication
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5.3 Command Communication
The BL-700 includes commands to directly operate the BL-700 (direct control
commands) and the commands used to change or confirm the BL700’s settings
(parameter setting commands).
5.3.1 Setup of Direct Control Commands
Communication procedure
1. Send a direct control command from the PC to the BL-700.
2. After receiving the command, the BL-700 sends back an OK response and
executes the required operation.
When the read operation control command or test mode control command is
sent to the BL-700, the BL-700 sends back no response.
3. When an incorrect command is sent to the BL-700, the BL-700 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].
• can be added after the command being sent. In this case, however, is
not added to the response data.
• When is inserted before the command being sent, characters in the BL-700’s
command receiving buffer are cleared.
• If the BL-700’s command receiving buffer contains erroneous characters due to data
transmission error during communication, add to the command being sent.
Note: 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-700 cancels the received characters.
Command
Response
LASER ON STB
OK/NG TIMING
TEST
BL-70 0
Command Response
Command CR Response CR
STX Command ETX STX Response ETX
Tips