Mitsubishi MELSEC Q Series Programming Manual page 514

COM
(4) Upon the execution of the COM instruction, the CPU module suspends the processing of the
sequence program, and refreshes the designated refresh item.
(5) The COM instruction can be used in a sequence program any number of times.
However, note that the sequence program scan time will be lengthened by the time taken for
refresh time of the communication with peripheral devices and refresh item that are selected
in SD778.
(6) Only with the Universal model QCPU and LCPU, interruption is enabled during the
execution of the COM instruction. However, note that the data can be separated if the
refresh data is used by an interrupt program etc.
(7) With the Built-in Ethernet port QCPU and LCPU, processing time may be increased if the
service process was executed by the COM instruction while the built-in Ethernet ports are in
Ethernet connection.
(8) Refresh items for the COM instruction are indicated in the following table.
CPU Module Type Name
Q00JCPU
Q00CPU
Q01CPU
Q02CPU
Q02HCPU
Q06HCPU
Q12HCPU
Q25HCPU
Q02PHCPU
Q06PHCPU
Q12PHCPU
Q25PHCPU
Q12PRHCPU
Q25PRHCPU
Q00UJCPU
Q00UCPU
Q01UCPU
Q02UCPU
Q03UDCPU
Q04UDHCPU
Q06UDHCPU
Q10UDHCPU
Q13UDHCPU
Q20UDHCPU
Q26UDHCPU
Q03UDECPU
Q04UDEHCPU
Q06UDEHCPU
Q10UDEHCPU
Q20UDEHCPU
Q13UDEHCPU
Q26UDEHCPU
L02CPU
L26CPU-BT
7-140
Execution of COM
instruction
0 END 0
Refreshes the designated
refresh items
SM775
OFF Refreshes refresh items other than I/O
ON Refreshes the refresh items selected by SD778.
OFF Refreshes refresh items other than I/O
ON Refreshes the refresh items selected by SD778.
OFF Refreshes refresh items other than I/O
ON Refreshes the refresh items selected by SD778
OFF Refreshes refresh items other than I/O
ON Refreshes the refresh items selected by SD778.
OFF Refreshes refresh items other than I/O
ON Refreshes the refresh items selected by SD778.
OFF Refreshes refresh items other than I/O
ON Refreshes the refresh items selected by SD778.
OFF Refreshes refresh items other than I/O
ON Refreshes the refresh items selected by SD778
Execution of COM
instruction
END 0
Refreshes the designated
refresh items
Refresh Item