Operating Instructions ACTIVE06/07 191
06/07 Operating Instructions ACTIVE 191
17.7.3 Encoder Monitoring
Failures of the speed sensor lead to a faulty behavior of the drive, as the measured
speed forms the foundation of the control mode. By default, the speed sensor moni-
toring system continuously monitors the speed sensor signal, the track signal and the
division marks. If, while the frequency inverter is released, a faulty signal is recog-
nized for longer than the timeout, a fault switch-off is effected. If the parameter
Op-
eration Mode
760 is set to zero, the monitoring function is deactivated.
Operation Mode 760 Function
0 - Off The function is deactivated.
2 - Error
A fault message is displayed according to the timeouts
set.
The speed sensor monitoring is to be parameterized in the sub functions according to
the application. The monitoring function becomes active with the release of the fre-
quency inverter and the start command. The timeout defines a monitoring time in
which the condition for the fault switch-off must be fulfilled without interruption. If
one of the timeouts is set to zero, this monitoring function is deactivated.
Parameter Settings
No. Description Min. Max. Fact. sett.
761 Timeout: Signal Fault 0 ms 65000 ms 1000 ms
762 Timeout: Channel fault 0 ms 65000 ms 1000 ms
763 Timeout: Direction fault 0 ms 65000 ms 1000 ms
Timeout: Signal Fault
The actual speed measured is compared with the output value of the speed controller.
If the actual speed value is exactly zero for the time selected with the parameter
Timeout: Signal fault 761, although a reference value is available, the fault is dis-
played with the message "F1430".
Timeout: Channel fault
The actual speed measurement monitors the sequence in time of the signals in the
quadruple evaluation of the speed sensor operation mode. If the speed sensor signal
is faulty for the time selected with the parameter
Timeout: Channel fault 762, the
fault is displayed with the message "F1431".
Timeout: Direction fault
The actual speed measured is compared with the reference speed. If the sign be-
tween reference value and actual value differs for the time selected with the parame-
ter
Timeout: Direction fault 763, the fault is displayed with the message "F1432".
The monitoring function is reset when the drive mechanism has moved in the refer-
ence value direction by a quarter of a revolution.
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