Woodward SEG HighPROTEC MRA4, Device Manual

Page: 235 / 510

Blockings
To block the tripping command of a protection stage temporarily by an active assignment.
The tripping command of any of the protection modules can be blocked from external. In this case, external does
not only mean from outside the device, but also from outside the module. Not only real external signals are
permitted to be used as blocking signals, as for example, the state of a digital input, but you can also choose any
other signal from the »assignment list«.
•
In order to establish a temporary blockage of a protection stage, the parameter »ExBlo TripCmd Fc« of
the module has to be set to »active« . This gives the permission: »The tripping command of this stage
can be blocked«.
•
Within the general protection parameters, a signal has to be chosen additionally and assigned to the
parameter »ExBlo« from the »assignment list«. If the selected signal is activated, the temporary blockage
becomes effective.
EN MRA4 04/09 Page 235