KEYENCE BL-180 - Manual (Page 105)

Power Supply BL-U1
99
6 Precautions for Programming
• Since the multidrop link requires communication of many commands, the host
computer must have high processing ability.
As the number of connected BL series increases, the host computer needs
higher data processing speed.
When the host computer’s processing speed is insufficient, the BL series’
transmission buffer will become full, and the BL series will send back the fol-
lowing response.
The BL series clears all data stored in the transmission buffer.
To prevent this, replace the host computer with a higher performance unit
(including processing of the programming language), or reduce the number of
the BL series connected to the host computer.
• If an incorrect ID number is specified, an incorrect format is used to send a
command, or a data transmission error occurs (checksum is incorrect), the BL
series sends back no response. You will need to design a program so that the
same command is sent again (Retry) if the BL series sends back no response
within a specified period (Timeout).
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