User`s manual

4 - 10

MELSEC-

4 SETUP AND PREPARATION BEFORE OPERATION

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.

4.9 Maintenance and Inspection

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

inspections items describes in the programmable controller CPU User's Manual so that

the system can always be used in the best condition.