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Mitsubishi Electric FX5 User Manual page 165

Melsec iq-f series
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Precautions
Do not change the value with program or engineering tool.
When the sum check code is set to [Added] in the communication settings, always select [Added] for the terminator.
Time-out time
These devices set the evaluation time for error when receiving of data is interrupted. (Unit: ms)
FX5 dedicated
CH1
CH2
SD8621
SD8631
R/W: Read/Write
Precautions
Do not change the time-out time setting while the RS2 instruction is being driven. To change the value, do so before the RS2
instruction is driven (while off). The change is enabled when the RS2 instruction is driven.
8-bit processing mode
These devices store the value for the processing mode set in the communication settings (Page 136).
FX5 dedicated
CH1
CH2
SD8622
SD8632
R/W: Read/Write
Precautions
Do not change the 8-bit processing mode while the RS2 instruction is being driven. To change the value, do so before the RS2
instruction is driven (while off). The change is enabled when the RS2 instruction is drive.
They are cleared by turning the PLC power OFFON, RUNSTOP or by resetting the system.
Header
These devices store the contents of headers 1 to 4 set in the communication settings (Page 136). When the headers are
set to [Added] in the communication settings, the headers are added to the send and receive data. Up to four headers can be
added in each channel.
Header
FX5 dedicated
First header
CH1
SD8623 (Low-order byte)
CH2
SD8633 (Low-order byte)
CH3
SD8643 (Low-order byte)
CH4
SD8653 (Low-order byte)
R/W: Read/Write
When data is sent, the data set in the headers is added at the head of the specified send data.
When data is received, data receiving begins when the data set in the headers is received.
Header
1
2
3
4
CH3
CH4
SD8641
SD8651
CH3
CH4
SD8642
SD8652
Second header
SD8623 (High-order byte)
SD8633 (High-order byte)
SD8643 (High-order byte)
SD8653 (High-order byte)
Data
Description
1 to 32767 (ms)
10 ms when set to a value outside the range.
Description
0: 16-bit processing mode
1: 8-bit processing mode
Third header
Fourth header
SD8624 (Low-order byte)
SD8624 (High-order byte)
SD8634 (Low-order byte)
SD8634 (High-order byte)
SD8644 (Low-order byte)
SD8644 (High-order byte)
SD8654 (Low-order byte)
SD8654 (High-order byte)
5 NON-PROTOCOL COMMUNICATION
R/W
R/W
R/W
R/W
R/W
R/W
163
5.9 Related Devices
5

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