Wire Breakage Detection - Mitsubishi AJ65BT-64RD3 User Manual

Pt 100 temperature input module

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User manual (142 pages)

Table Of Contents

Table of Contents

3. SPECIFICATIONS

3.3.4

The AJ65BT-64RD detects wire breakage in the platinum temperature-measuring resistor or cable

used for each channel, and turns on the wire breakage detection flag (RXn4 to RXn7) for the

corresponding channel.

On the AJ65BT-64RD, the wire breakage detection are performed for channels that are enabled for

conversion.

The relationships between the wire breakage detection and conversion enable/disable are shown

below.

No breakage

Breakage

No connection

POINT

• Be sure to set the channels having no platinum temperature-measuring resistor attached to

"conversion disabled."

If a channel having no platinum temperature-measuring resistor attached is set to "conversion

enabled," the wire breakage detection flag will turn on.

• The channels for which wire breakage detection turned on will retain the detected temperature

value immediately prior to the breakage detection, and the conversion completion flag for the

corresponding channel will turn off.

When the detected breakage is fixed, updating of detected temperature value after repair will

be resumed and the conversion completion flag will be turned on again.

• For platinum temperature-measuring resistor wiring details, refer to Section 4.7.