Mitsubishi Electric MELSEC-Q Series User Manual page 176

Execute the dedicated instructions while the data link is being performed.
If any of the dedicated instructions is executed offline, no error will occur, but the execution of the dedicated instruction will
not be completed.
(2) Applicable devices
The following devices are available for the dedicated instructions:
Bit
X,Y,M,L,F,V,B
*1 Bit specification of word device can be performed as bit data. Bit specification of word device can be performed by
specifying "Word device" . "Bit No.". (Bit No. must be specified in hexadecimal.)
For example, bit 10 of D0 is specified as "D0.A".
Note that the bit specification cannot be performed for timers (T), retentive timers (ST), and counters (C).
(3) Precautions
(a) Use of Monitoring time setting (SW0009) and Dedicated instruction retry count
setting (SW000B)
If dedicated instructions are abnormally ended due to noise, increase the monitoring time and retry count to
avoid it. Configure the settings using Monitoring time setting (SW0009) and Dedicated instruction retry count
setting (SW000B).
• Availability of Dedicated instruction retry count setting (SW000B) (
Dedicated instruction retry count setting (SW000B) is applicable to the following dedicated instructions.
Instruction
G(P).RIRD
G(P).RIWT
G(P).RISEND
G(P).RIRCV
G(P).RIFR
G(P).RITO
G(P).RLPASET
G(P).RDMSG
No retry is performed if the target station is disconnected at the execution of the dedicated instruction.
• Timing of the settings
Set Monitoring time setting (SW0009) and Dedicated instruction retry count setting (SW000B) before
executing dedicated instructions.
• Version of a master/local module
Before using the retry count setting, check the version of the master/local module. (
Appendix 6 (2))
174
Internal device
*1
Word
T,ST,C,D,W
File register
R,ZR
: Applicable, : Applicable only for SW0009, ×: Not applicable
Station where dedicated instructions are executed
Master station
×
×
×
Constant
K,H
Page 351, Appendix 3.2)
Local station
×
×
×
×
×
×
Page 399,