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MELSEC-Q
7 APPLICATION FUNCTIONS
7.1.1 Link dedicated instruction
(1) Reading/writing remote I/O station intelligent function module buffer
memory (Z(P).REMFR/ Z(P).REMTO)
This section describes the REMFR/REMTO instruction format.
For a program example using the REMFR/REMTO instruction, refer to Section
6.4.2.
The REMFR instruction reads the data from the buffer memory of the intelligent
function module mounted to the remote I/O station.
The REMTO instruction writes the data to the intelligent function module buffer
memory mounted to the remote I/O station.
POINT
(1) The B/W for the handshake that is required when writing the remote I/O station
intelligent function module buffer memory in a MELSECNET/10 network is not
needed with REMFR/REMTO instructions. However, they have to be set if
input/output X/Y is to operate as a system.
(2) Link dedicated instructions including REMFR/REMTO cannot use the CPU
module local device and "use same file as program" as selected file register.
(3) Turn off the executing link instruction after the completion device turns on.
(a) Instruction format
1) Z(P).REMFR (Network No. designation)
Z.REMFR
Z: Executed when on
Read command
ZP.REMFR
ZP: Executed when rising
Read command
"Jn"
n3 D1n4 n5 D2
"Jn"
n1 n2
n3 D1n4 n5 D2n1 n2
: If the originating station is a Universal model QCPU, " "(double quotation) for the
first argument can be omitted.
Description of setting Setting range
Jn Target network No. 1 to 239
(n1) Channel number
1 to 8
Word device
2
(n2) Target number
1 to 64
Word device
2
(n3)
Start address input/output number for target intelligent function module
The upper 3 digits of the 4-digit expression designates the first address input/output number
for the intelligent function module mounted to the remote I/O station that is to be the target.
0 to FE
H
Word device
2
(n4)
Read buffer memory start address
Designates the start address of the buffer memory for the read destination intelligent
function module.
Constant (K, H)
Word device
2
(D1)
Read data storage start address device (Host)
Designates the host start address device for storing the read data.
Word device
2
(n5)
Number of read data points (word units)
1 to 960
Word device
2
(D2)
Read completion device (Host)
Designates the host device to be set to 1 scan on by the read completion.
(D2) · · · · · · OFF: Not completed ON: Completed
(D2) + 1 · · · OFF: Normal ON: Abnormal
Bit device
1
Word device bit designation
3
1: Bit device ........................................... X, Y, M, L, F, V, B
2: Word device ...................................... T, C, D, W, ST, R, ZR
3: Word device bit designation ............. Word device.bit number