R.V.R. Elettronica PJ10KPS-CA, Руководство пользователя и техническое руководство, Страница: 212 / 218

PJ10KPS-CA
User & Technical Manual
206
8.6.3
Automatic changeover
When the PJ10KPS-CA is in the exciter automatic changeover mode, the power
emitted by the on air exciter is checked constantly. If at any time the on air exciter
is no longer good (i.e. power drops to below the preset level), the apparatus is kept
operational whereas the exciter connected to the internal Dummy Load turns on.
If the latter one is good (i.e. it is capable of supplying the required power), then
the two exciters are changed over. Instead if the alternative exciter is not good, no
changeover takes place, the control unit commands the mute RF of the exciter to
Dummy Load, it waits 120 s. and repeats the attempt. This procedure is repeated
indefinitely until one of the two exciters is considered to be good.
During the whole length of time during which there is no good exciter, the PJ10KPS-
CA keeps the WAIT LED on for signaling this status.
Each exciter is fitted with its own mute RF. On being commanded, the piloting signal
must return to zero within 3 seconds at the most. If this does not occur, the fault is
recorded by an error message that is entered in the alarms menu.
If the mains signal is not OK, the exciters turn off automatically. If the piloting power
exceeds the limit during operations, the PJ10KPS-CA is set to the FAULT status
and the power supply of the exciters is turned off. A message in the alarms menu
signals the fault. Keep in mind that the operator’s intervention is required to exit
from the FAULT status.
If the MAINS signal coming from the bus is not OK, the exciters are all turned off.
As soon as the MAINS signal is regular again, the evaluation cycle of the exciters
begins (see 8.6.4).
When the apparatus is set to STDBY, the mute RF signals of the exciters are
activated and as such both exciters are inhibited. If the ON key is pressed, the
system re-evaluates both exciters in the same manner as in the procedure from
OFF to ON (see 8.6.4).
When the apparatus is set to EXT INT or AUX INT, the mute RF signals of the
exciters are activated and therefore both exciters are inhibited. When the external
interlocks are released, the system re-evaluates both exciters as during the phase
from OFF to ON (see 8.6.4).
8.6.4
Phase from ON to OFF
When the apparatus is set to OFF status and you press the ON button, the power
supply of the exciters is activated and the logic starts to evaluate the exciters. During
the evaluation phase, the WAIT LED stays ON.
When the apparatus is turned OFF, it memorizes the exciter on air. Consequently
when the machine restarts it can attempt to restore the previous conditions. On the
machine restarting, if the exciter that is to be aired does not attain the preset power
level whereas the spare one is operational, the apparatus performs the changeover
when the evaluation time (120 s.) expires.