Mitsubishi Electric MELSEC iQ-R C R12CCPU-V, User Manual

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APPX
Appendix 4 Device List
Device descriptions
The following shows the overview of available devices.
For more details on devices, refer to the following manual.
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MELSEC iQ-R CPU Module User's Manual (Application)
Device name Description
User device Input X A device that provides CPU module with commands and/or data using an external device,
such as pushbutton, transfer switch, limit switch, or digital switch.
Output Y A device that outputs the operation results of the program to a device, such as external
signal light/digital HMI/electromagnetic switch (contactor) /solenoid.
Internal relay M A device that is used as an auxiliary relay within the CPU module.
Data register D A device that stores numerical values.
Link relay B A device that is used in a C Controller module when refreshing data between a network
module and a C Controller module.
Link register W
System Device Special relay SM A device that is used to store the status of a C Controller module. The specification of
special relays is defined in a C Controller module.
For details on the special relay, refer to the following section.
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Page 211 Special Relay List
For details on the special register, refer to the following section.
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Page 213 Special Register List
Special register SD
Link direct device Link input Jn\X A device that directly accesses link relays and/or link registers in a network module on the
CC-Link IE Controller Network and/or CC-Link IE Field Network.
Link output Jn\Y
Link relay Jn\B
Link special relay Jn\SB
Link register Jn\W
Link special register Jn\SW
Module access
device Module access device Un\G A device that directly accesses from the CPU module to the buffer memory of an intelligent
function module mounted on the main base unit and extension base unit.
CPU buffer memory
access device CPU buffer memory access
device U3En\G A device that accesses memory used for reading/writing data among CPU modules in a
multiple CPU system, or for the CPU module built-in function such as Ethernet function
Fixed cycle communication
area access device U3En\HG
File register File register ZR A device that retains data while the power is OFF. It exists in the file storage area of the
device/label memory.
Pointer Interrupt pointer I A device that performs a corresponding routine when using the interrupt function