Maintenance And Inspection - Mitsubishi AJ65SBT-64AD User Manual

Melsec-a series general purpose programmable controller analog-digital converter module

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4 SETUP AND PREPARATION BEFORE OPERATION

4.9 Maintenance and Inspection

POINT

• A/D conversion values are fluctuated by self-heating within approx. 30 minutes

after power is turned ON.

•

In an unused channel, if terminals remain open, an erratic digital value may be output.

To prevent this, take any of the following measures.

1. Select Prohibit in the A/D conversion enable/prohibit setting for the unused channel.

Note that changing the setting from Enable to Prohibit will reduce the sampling cycle.

2. Short-circuit the input terminals (terminal V+ and COM) of the unused channel.

3. Connect the AG terminal to the GND terminal of the external device.

There are no special inspection items for the AJ65SBT-64AD module, but follow the

inspections items describes in the PLC CPU User's Manual so that the system can

always be used in the best condition.

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MELSEC-A

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