Maintenance And Inspection - Mitsubishi AJ65BT-64RD3 User Manual

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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