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MELSEC-Q
6 DEDICATED INSTRUCTIONS
6.7 REQ Instruction (Remote RUN/STOP)
This instruction issues remote RUN/STOP requests to PLC CPUs of other stations.
Applicable device
Internal device
MELSECNET/H,
MELSECNET/10
Direct J
\
Set
data
Bit Word
File register
Bit Word
Special module
U \G
Index register Zn
Constant
K, H
Others
(S1) — —
(S2) — —
(D1) — —
(D2) —
REQ
JP.REQ
J.REQ
Jn (S1) (S2) (D1)
Command
REQ
(D2)
REQ
GP.REQ
G.REQ
Un
REQ
(S1) (S2) (D1) (D2)
Jn (S1) (S2) (D1) (D2)
Un (S1) (S2) (D1) (D2)
Command
Command
Command
[Instruction
symbol]
[Executing
condition]
Set data
Set data Description Set by Data type
Jn
Network number of the local station (1 to 239, 254)
254: The network designated by the valid module during other station
access.
Binary 16 bits
Un
Start I/O signal of the local station's Ethernet net module.
(00 to FE: The higher 2 digits of the 3-digit I/O signal.)
User
Character string
(S1)
Head device of the local station that stores the control data.
User, system
(S2)
Head device of the local station that stores the request data.
User
(D1)
Head device of the local station that stores the response data.
Device name
(D2)
Local station device that is turned on for one scan by the completion of
the instruction.
(D2) + 1 is turned on if the instruction execution completes abnormally.
System
Bit
The local devices and the file register for each program cannot be used as devices
used in setting data.
POINT
The REQ instruction can be executed only when the target station is a Q/QnACPU.
(The REQ instruction cannot be executed to an ACPU connected to an
MELSECNET/10 or Ethernet network system.)
REMARK
The number of basic steps for the REQ instruction is 9.
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