Accessible Ranges And Devices Of Melsec Data Link Functions - Mitsubishi MELSEC-Q Series User Manual

10
FUNCTIONS AND PROGRAMMING

10.3.12 Accessible ranges and devices of MELSEC data link functions

This section explains the accessible range and devices for use of the MELSEC data link
functions.
(1) Multiple CPU system access
The following explains the accessible range and devices at the time of multiple CPU
system access.
(a) Accessible range
In a multiple CPU system, the C Controller module can access the self station (C
Controller module) and programmable controller CPUs in the system only.
Figure 10.22 Accessible range in multiple CPU system
(b) Accessible devices
The following explains the accessible devices at the time of multiple CPU system
access.
POINT
1. The words, Batch and Random in the table indicate the following.
Batch : Batch write (mdSend function) and batch read (mdReceive function)
Random: Random write (mdRandW function), random read (mdRandR
function), bit set (mdDevSet function) and bit reset (mdDevRst
function)
2. Bit set (mdDevSet function) and bit reset (mdDevRst function) can access
only the bit devices.
3. The CPU shared memory is accessible only when multiple CPU setting have
been done.
10.3 Programming Using MELSEC Data Link Functions
10.3.12 Accessible ranges and devices of MELSEC data link functions
C Controller module
CPU CPU CPU
No.1 No.2 No.3
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