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

1.2

Transient Transmission

Transient transmission is used for communications at any timing and has the following three types.
Page 52 Communications using a dedicated instruction
Page 52 Communications using the SLMP
Page 53 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 286 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 RJ71GN11-T2 and the external device such as a personal computer or HMI (Human Machine
Interface) 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.
This function allows seamless communications with stations on different types networks.
The RJ71GN11-T2 sends and receives (1), and relays (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.
1 FUNCTIONS
52
1.2 Transient Transmission
Master station
(1)
(2)
CPU module
Local station
2
Device
1234H
(1)