Dropout Function - Mitsubishi Electric MELSEC-Q series User Manual

4.8

Dropout Function

When an input current is around 0A, a CT's conversion accuracy is low. To avoid digital output of such an unstable CT
input value, digital output values within the set value can be dropped to 0 forcibly.
(1) Operation of the dropout function
When the value in CH Digital output value (Un\G11 to Un\G18) is equal to or less than the set value in CH
Dropout value (Un\G162 to Un\G169) in advance, 0 is stored in CH Digital output value (Un\G11 to Un\G18).
(2) Setting procedure
1.
Set Enable (0) to Conversion enable/disable setting (Un\G0).
2.
Set Enable (0) to Dropout detection setting (Un\G160).
3.
Set values to CH Dropout value (Un\G162 to Un\G169).

CH Dropout value (Un\G162 to Un\G169)
4.
Turn on then off Operating condition setting request (Y9).
Remark
To check whether the dropout function is enabled or disabled, refer to the following.
• Dropout status flag (Un\G161) (
Item
Page 119, Section 6.2 (23))
CHAPTER 4 FUNCTIONS
Setting range
1 to 10000
47
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