Transient Transmission; Communications Using A Dedicated Instruction; Communications Using The Slmp - Mitsubishi Electric MELSEC iQ-R Series User Manual

9.3

Transient Transmission

Transient transmission is used for communications at any timing and has the following three types.
Page 176 Communications using a dedicated instruction
Page 176 Communications using the SLMP
Page 177 Communications using the engineering tool

Communications using a dedicated instruction

Data is read/written from the master station or local station to devices in a CPU module of the local station or the buffer
memory areas of a remote station using the dedicated instructions.
For dedicated instructions that can be used and details on dedicated instructions, refer to the following.
Page 212 DEDICATED INSTRUCTION
 MELSEC iQ-R Programming Manual (Module Dedicated Instructions)
Ex.
Accessing a local station using the dedicated instruction (READ instruction)
CPU module
1
Command
READ
3
Device
1234H

Communications using the SLMP

Data is read/written from the CC-Link IE TSN Plus module and the external device, such as a personal computer, to devices
in the CPU module of the master station and local station and the buffer memory areas of the remote station via an SLMP.
It allows seamless communications with stations on different types networks.
The CC-Link IE TSN Plus module can send/receive (1) and relay (2) SLMP messages. For details on an SLMP, refer to the
following.
 SLMP Reference Manual
Ethernet
Precautions
For SLMP communications, set the same communication speed for the connected station and access destination. When
different communication speeds are set for the connected station and access destination, SLMP communication may not be
possible.
9 FUNCTIONS
176
9.3 Transient Transmission
Master station
(1)
(2)
Local station CPU module
Device
2
1234H
(1)