MS48IP Programming Guide
27
Polarity Reversal Detection Time Filter:
The detection duration of the Polarity Reversal on the lines can be programmed.
According to the defined duration, short or long period Polarity Reversal is not
detected.
8 7 7 6 4 0 4 P
Parameters:
P
: 0
Filter Time in 20 msec.
: 9
Filter Time in 200 msec.
Default Value:
P = 7 (160 msec.)
Notes:
1. Dialing the code 8776 4 04 * sets the Polarity Reversal detection duration as its
default value.
2. P parameter can be programmed as from 0 up to 9. Each parameter value has
20 milliseconds increment. Such as; P = 1 means 40 msec, P = 5 means 120
msec.
3. It is recommended to decrease this duration if system can not detect the
Polarity Reversal on the lines and also this duration should be increased if the
system detects the Polarity Reversal easily even when C.O. does not reverses
polarity.
