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7.2.1 Precaution When Using RS485 Port
FPG-COM3 (AFPG803), FPG-COM4 (AFPG806)
SYS1 instruction is available for FPΣ, which enables to change the time after receiving a command until
a response is returned.
With the converter SI-35 manufactured by Lineeye Co., Ltd, adjust the response time by this instruction if
necessary.
SYS1 instruction: This is to delay a response for [n] scan time to be specified.
Example:
When R0 turns on, the response of COM1 port (RS485 port) delays for two scans. If the scan time is
500µs, it delays for 1 ms.
Reference: <FP series Programming manual>
The RS485 port of AFPG806 (COM4) occupies the communication line for a given time after transmitting
data. No transmission is available during this period.
When data is transmitted from FPΣ via the RS485 communication of AFPG806 (COM4), start the
transmission of the data to FPΣ after the time mentioned blow passes at a receiver.
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