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MELSEC-Q
6 PROGRAMMING
Instruction
Name
Execution station
Description
Target station
Reference
section
Process
CPU
Redundant
CPU
2
Multiplexed
remote
master
station
Multiplexed
remote
sub-master
station
RTMWR
Write
clock
data into
other
station
Performs "Write clock data" to the CPU module of the other station.
RTMWR
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Clock data
CPU CPU
Network module Network module
1
1: For details of the SEND, RECV, READ, SREAD, WRITE, SWRITE, REQ, RECVS, ZNRD, ZNWR, RRUN, RSTOP,
RTMRD, and RTMWR instructions, refer to the Q Corresponding MELSECNET/H Network System Reference Manual
(PLC to PLC network).
The multiplexed remote master station or the current master station is accessible with each instruction by specifying the
target station No. to "7D
H" or "7EH" respectively.
2: If the Redundant CPU of the execution station executes the unusable instructions such as SEND, RECV, RECVS, to
the target station once, it will not result in an error. However, if it executes the unusable instruction again, it will result in
an error.
Also, RRUN instruction and RSTOP instruction may result in an error on the Redundant CPU of the target station.
3: It is recommended to use SB0048 (ON: multiplexed remote master station) as an interlock signal when executing
REMTO instruction, to refer to if the host station operates as a master.
POINT
(1) Eight channels may be used with each link dedicated instruction. Hence, up to
eight instructions can make simultaneous access to the intelligent function
modules of the remote I/O station.
It is recommend to combine GX Configurator's automatic refresh setting and
cyclic transmission to access the data of the intelligent function module that is
continuously accessed (e.g. the analog input value of the analog-digital
converter module).
(Refer to Section 6.3.)
(2) Link dedicated instructions must be executed in online mode.
Execution of the link dedicated instructions is not allowed in offline mode.
(3) When the link dedicated instruction is used to access the other station
programmable controller during network diagnosis, the execution of the link
dedicated instruction may be delayed.
After taking the following measures, perform network diagnosis processing and
execute the link dedicated instruction.
• Execute the COM instruction.
• Secure the communication processing security time for 2 to 3ms.
For the High Performance model QCPU, Process CPU, and Redundant CPU,
set it by the special register SD315.
For the Universal model QCPU, set it by the service processing setting of the
PLC parameter (PLC system) of GX Developer.