Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 278

7 APPLICATION FUNCTIONS
Instruction format
[Network No. specification]
[Instruction symbol]
JP.READ
JP.SREAD
[Network module start I/O No. specification]
[Instruction symbol]
GP.READ
GP.SREAD
The following formats can be used only when the host is the Universal model QCPU
[Network No. specification]
[Instruction symbol]
JP.READ
JP.SREAD
[Network module start I/O No. specification]
[Instruction symbol]
GP.READ
GP.SREAD
2: The SREAD instruction can be programmed without argument (D3).
However, in such a case, the operation is identical to the READ instruction.
With the SREAD instruction, different operations are available depending on whether (D3) is omitted or not.
3: When the target station is a Basic model QCPU or safety CPU, the read notification device set as argument (D3) for the
target station is ignored. (Same operation as with the READ instruction)
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[Execution condition]
Command
Command
[Execution condition]
Command
Command
[Execution condition]
Command
Command
[Execution condition]
Command
Command
JP.READ Jn (S1)
JP.SREAD Jn (S1)
GP.READ Un (S1)
GP.SREAD Un (S1)
JP.READ Jn (S1)
Jn
JP.SREAD (S1)
GP.READ Un (S1)
GP.SREAD Un (S1)
MELSEC-Q
(D2)
(S2) (D1)
(S2) (D1) (D2) (D3)
2 3
(S2) (D1) (D2)
(D2) (D3)
(S2) (D1)
2 3
"(S2)" (D2)
(D1)
"(S2)" (D2) (D3)
(D1)
2 3
"(S2)"
(D1) (D2)
(D2) (D3)
"(S2)" (D1)
2 3
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