Melsec Data Link Functions; Access Ranges And Accessible Devices - Mitsubishi Electric MELIPC MI5000 Series Programming Manual

1.2

MELSEC Data Link Functions

This section shows the access ranges, devices, argument specifications, and considerations of MELSEC communication
functions.

Access ranges and accessible devices

The following shows the access ranges and accessible devices of MELSEC communication functions.
Communication addressed to own station
The access ranges and accessible devices during communication addressed to own stations are as follows.
■Access range
Only own stations (MELIPC) can be accessed during communication addressed to own station.
■Accessible devices
It indicates an accessible device during communications with the own station.
• The following table shows batch and random access.
Batch: batch writing (mdSendEx function), batch reading (mdReceiveEx function)
Random: random writing (mdRandWEx function), random reading (mdRandREx function), bit set
(mdDevSetEx function), and bit reset (mdDevRstEx function)
• Bit set (mdDevSetEx function) and bit reset (mdDevRstEx function) can access bit devices only.
• Device extension specifications (digit specification, bit specification and index specification) cannot be used.
Device name (device)
Internal relay (M)
Special relay (SM)
Data register (D)
Special register (SD)
Link relay (B)
Link register (W)
File register (ZR)
CPU buffer memory (U3E0\G)
1 PROGRAMMING
10
1.2 MELSEC Data Link Functions
Batch
Random
Batch
Random
Batch
Random
Batch
Random
Batch
Random
Batch
Random
Batch
Random
Batch
Random
Device name specification
DevM
DevSM
DevD
DevSD
DevB
DevW
DevZR
DevSPB1