Appendix 6 Special Relay (Sm)/Special Register (Sd) List - Mitsubishi Electric IQSS-R-E Reference Manual

Appendix 6
This section shows the list of special relays (SM)/special registers (SD) used for the data backup/restoration function.
How to read the special relay (SM)/special register (SD) list
The following shows how to read the special relay (SM)/special register (SD) list.
Item
Number
Name
Description
Details
Set by (setting timing)
Do not change the special registers set by system by operations, such as program modification or device test.
Doing so may result in system down or communication failure.
Special Relay (SM)/Special Register (SD)
List
Description
Indicates the device number of special relays (SM)/special registers (SD).
Indicates the device name of special relays (SM)/special registers (SD).
Indicates the description of special relays (SM)/special registers (SD).
Indicates the details of special relays (SM)/ special registers (SD).
Indicates the timing to set each device by system and user.
<Set by>
• S: Set by system.
• U: Set by user (program, engineering tool, GOT, or other testing operations from external device).
• U/S: Set by both user and system.
<Set timing>
• Status change: Set when a status is changed.
• Error: Set when an error occurs.

Appendix 6 Special Relay (SM)/Special Register (SD) List

A
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