Mitsubishi QJ71LP21 User Manual

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MELSEC-Q
6 PROGRAMMING
Execution
station
Target station
Instruction
Name
QnPH
CPU
QnPRH
CPU
2
Description
Multiplexed
remote
master
station
Multiplexed
remote sub-
master
station
Reference
section
RTMWR
Write
clock
data into
other
station
"Write clock data" to the CPU module of 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 READ/WRITE instructions, refer to the Q Corresponding MELSECNET/H Network System Reference
Manual (PLC to PLC network).
2: If the QnPRHCPU 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.
3: It is recommended to use SB48 (ON: multiplexed remote master station) as an interlock signal when executing PRUN
or RSTOP instruction, to see if the host station operates as a master station.
POINT
(1) Eight channels may be used with each dedicated link instruction. Hence, up to
eight instructions can make simultaneous access to the intelligent function
modules of the remote I/O station.
We recommend you 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 input
module).
(Refer to Section 6.3.)
(2) Execute the dedicated link instructions during data link.
If it is executed in the offline mode, an error will not occur but the dedicated link
instruction will not be completed.
(3) When the dedicated link instruction is used to access the other station PLC
during network diagnosis, the execution of the dedicated link instruction may be
delayed.
After taking the following measures, perform network diagnosis processing and
execute the dedicated link instruction.
• Execute the COM instruction.
• Using special register SD315, secure 2 to 3ms as the communication
processing time.
REMARK
If an SREAD, SWRITE instruction is erroneously executed to a remote I/O station,
the notification device to the object station is ignored and the it is processed in the
same manner as READ,WRITE.

Mitsubishi QJ71LP21 Specifications

General

Brand	Mitsubishi
Model	QJ71LP21
Category	Controller
Language	English