Accessible Range And Devices - Mitsubishi Electric MELSEC iQ-R C Series Programming Manual

Accessible range and devices

This section explains the accessible range and accessible devices when using MELSEC data link functions.
The accessible range of the devices varies depending on specifications and settings of an access target module. For the
accessible range, check the access target module specifications.
Bus interface communication
The following explains the accessible range and devices for bus interface communication.
Accessible range
The accessible range for bus interface communication includes the own station (C Controller module), and the CPU module
and C Controller module in a multiple CPU system.
System configuration
C Controller module
Accessible devices
The devices accessible for communication via a bus are shown below.
• 'Batch' and 'Random' in the following table indicate as follows:
Batch: Batch write (mdSendEx function), batch read (mdReceiveEx function)
Random: Random write (mdRandWEx function), random read (mdRandREx function), bit set (mdDevSetEx
function), bit reset (mdDevRstEx function), random write by using a label name (mdRandWLabelEx
function), random read by using a label name (mdRandRLabelEx function)
• Bit devices can be accessed by using 'bit set' (mdDevSetEx function) and 'bit reset' (mdDevRstEx function).
• The fixed cycle communication area can be accessed only when the multiple CPU setting is configured.
• Device extension specifications (digit specification, bit specification and index specification) cannot be used.
1 COMMON ITEMS
1.3 MELSEC Data Link Functions
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