Mitsubishi Electric FX5 User Manual page 143

■Terminator
When terminators are set in the communication settings (Page 136), the set values are stored in SD8625 and SD8626 for
CH1, SD8635 and SD8636 for CH2, SD8645 and SD8646 for CH3 and SD8655 and SD8656 for CH4.
Up to 4 terminators can be set.
Terminator FX5 dedicated
First header
CH1 SD8625 (Low-order byte)
CH2 SD8635 (Low-order byte)
CH3 SD8645 (Low-order byte)
CH4 SD8655 (Low-order byte)
When data is sent, the stored data in the devices above is added at the end the specified send data.
When data is received, receiving is completed
If the first terminator value is 00H, the terminator settings are not configured. The area before "00H" (in 1-byte units) is used to
set the terminators.
*1 Receiving is completed also when the amount of received data specified by the RS2 instruction is received or when the receiving of data
is suspended and the specified time-out occurs.
■Sum check
When the sum check code is selected as [Added] in the communication settings (Page 136), the sum check is executed
for the send and receive data.
When [Added] is selected, always configure the terminators.
When data is sent, the sum of "data" + "terminator" is calculated, and added to the send data.
When data is received, it is checked whether or not the received sum is equivalent to the sum calculated by the PLC.
■CR+LF
When the control procedure is selected as "CR + LF provided" in the communication settings (Page 136), the character
code of "CR + LF" is added at the end of the send data.
When data is received, receiving is completed when "CR + LF" is received continuously.
However, receiving is also completed when the specified amount of received data is received or when data receiving is
suspended and the specified time-out occurs.
Make sure that "CR" is not included in the message.
Second header
SD8625 (High-order byte)
SD8635 (High-order byte)
SD8645 (High-order byte)
SD8655 (High-order byte)
*1
when the stored data in the devices above is received.
Third header Fourth header
SD8626 (Low-order byte) SD8626 (High-order byte)
SD8636 (Low-order byte) SD8636 (High-order byte)
SD8646 (Low-order byte) SD8646 (High-order byte)
SD8656 (Low-order byte) SD8656 (High-order byte)
5 NON-PROTOCOL COMMUNICATION
5.7 Programming
5
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