Mitsubishi QJ71GP21-SX, Reference Manual

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9
- 176 9.20 J(P)/G(P).RIWT
9
DEDICATED INSTRUCTIONS
* 3 The extended data register of address D65536 or higher, and the extended link register of address
W10000 or higher cannot be specified.
POINT
The Arrival monitoring time and Number of resends are specified in the following
link special register (SW).
Appendix 2 Link Special Register (SW) List
• Arrival monitoring time (RIRD/RIWT instruction) (SW0009)
• Number of resends (RIRD/RIWT instruction) (SW000B)
(3) Function
(a) RIWT instruction overview
Data to be written to the target station are stored in the send buffer of the CC-Link
IE controller network module.
The data specified in (S2) are written to the CPU module device specified in
(S1)+2 and (S1)+3 of the station specified in (S1)+1.
When a response informing of write completion is returned from the target station,
the device specified in (D) is set to on.
(b) Checking the execution status of the RIWT instruction
The execution status of the RIWT instruction (Executing, Normal completion,
Error completion) can be checked with the following devices specified in the
setting data.
1) Completion device (D)
Turns ON in the END processing for the scan after completion of the RIWT
instruction, and turns OFF in the next END processing.
2) Completion status indication device ((D)+1)
Turns ON or OFF depending on the completion status of the RIWT instruction.
• When completed normally
It remains OFF.
• When failed
It turns ON in the END processing for the scan after completion of the
RIWT instruction, and turns OFF in the next END processing.
Figure 9.152 RIWT instruction
RIWT
(S2) (S1)+2
(S1)+3
CPU module
[Own station] [Target station]
CC-Link IE controller
network module
CPU module
CC-Link IE controller
network module
Send buffer