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The internal relay turns itself on when the power is turned off and on.

ID:
823
Issued:
Dec 25th, 2009
Updated:
May 16th, 2013

The internal relay turns itself on when the power is turned off and on.

ANSWER
When a battery is not installed, this phenomenon occurs when system register No. 7 (start number of the internal relay holding area) is set to a value lower than the initial value 90. Use in this way causes an attempt to back up internal relay R using the battery, but since the battery is not installed the status of the area set for holding is not definite. The same thing can be said for the timer counter elapsed value of system register No. 6 and the value of data register No.8.

If a battery is not installed, please leave this setting at the initial value. (Areas subsequent to the area set with the initial value are backed up in the EEP-ROM area, so there is no possibility of values becoming indeterminate.)
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