Device Description - Mitsubishi Electric MELSEC Q Series User Manual

3.3.2

Device Description

Described below are the overview of the available devices.
For details, refer to the following manual.
QCPU User's Manual (Function Explanation, Program Fundamentals)
Device
I/O Device
*1,*2
Input
*3
Output
Internal User Device
Internal relay
Data register
Link relay
Link register
Internal System Device
Special relay
Special register
Link Direct Device
Link input
Link output
Link relay
Link special relay
Link register
Link special register
Module Access Device
Intelligent function
module device
Multiple CPU area
device
*1 : Writing to the input (X) is ignored.
*2 : If the following input (X) is read out, the read data will be 0 (OFF).
• No module is installed.
• An output module is installed.
*3 : If the following output (Y) is read out, the read data will be 0 (OFF).
• No module is installed.
• An output module is installed.
This is a device that corresponds to various user applications.
Input is used for giving commands and data to the C Controller module from an
X external device such as a push-button switch, a selector switch, a limit switch,
or a digital switch.
Output is for outputting program control results to an external signal lamp,
Y
digital HMI, electromagnetic switch (contactor), solenoid, etc.
This is a device created on the work RAM of the C Controller module.
This is a device that corresponds to various user applications. To create an
internal user device, use the device function (Page 169, Section 11.6).
M This is an auxiliary relay used inside the C Controller module.
D This memory can store numerical data (-32768 to 32767 or 0000
B This is a relay/memory on the C Controller module side available to refresh the
network module link device (LX/LY/LB/LW/RX/RY/RWw/RWr) to the C
Controller module, or to refresh the data within the C Controller module to the
W
network modules link device.
This is a device for system.
This is an internal relay with specification defined inside the C Controller
module, that stores the C Controller module status.
SM
For details of the special relay, refer to the following.
Page 478, Appendix 6
This is an internal register with specification defined inside the C Controller
module, that stores the C Controller module status (failure diagnostics and
SD system information).
For details of the special register, refer to the following.
Page 480, Appendix 7
Jn\X
Jn\Y
This device directly accesses a link device in the network module.
Jn\B
Link devices in network module can be read or written by user programs,
independently of the link device refresh of the C Controller module.
Jn\SB
Jn\W
Jn\SW
This device is for directly accessing the buffer memory of an intelligent function
Un\G
module installed in the base unit from the C Controller module.
This device accesses the CPU shared memory in each CPU module of the
U3En\G multiple CPU system. For the CPU shared memory, refer to the following.
Page 251, Section 14.1
CHAPTER 3 SPECIFICATIONS
Description
3
to FFFF ).
H H
51