Internal Relay (M); Latch Relay (L); Link Relay (B); Annunciator (F) - Mitsubishi Electric MELSEC iQ-R Series User Manual

Process cpu module

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Table of Contents

Internal relay (M)

This device is used as an auxiliary relay within the CPU module. The following operations turn off all the internal relays.

• Powering off and on the CPU module

• Latch clear

This device is an auxiliary relay which enables latching (data retention during power failure). This device is used within the

CPU module. This device latches operation results (ON/OFF information) even after the following operations.

• Powering off and on the CPU module

This device is used as a CPU side device when refreshing bit data between the network module, such as the CC-Link IE

Controller Network module and the CPU module.

Refreshing network modules using link relay

Data are transferred/received between the link relay (B) within the CPU module and the link relay (LB) of the network module,

such as the CC-Link IE Controller Network module. The refresh range is specified using parameters on the network module.

The part which is not used for refreshing can be used for other applications.

This device is an internal relay used for a customer-created program which detects malfunction/failure of the equipment.

When the annunciators are turned on, SM62 (Annunciator) is turned on, the number of activated annunciators and their

device numbers are stored in SD62 (Annunciator number) to SD79 (Table of detected annunciator numbers).

Failure detection program

(1) Outputs the annunciator number of the annunciator that turned on.

(2) ON detection of the annunciator

Also the number of the annunciator that turned on first (the number stored in SD62) is registered in the event history.

Only one annunciator number is registered in the event history while power is turned on.

27.3 User Device