Woodward highprotec MRI4, User Manual

Page: 377 / 727

Switchgear/Breaker – Manager
Supervision of the ON command
When an ON command is initiated, the »
t-Move ON« timer will be started. While the timer is running, the »POS
I
NDETERM
« State will become true. If the command is executed and properly fed back from the switchgear before the
timer has run down, »POS ON« will become true. Otherwise, if the timer has expired »POS D
ISTURB
« will become
true.
Supervision of the OFF command
When an OFF command is initiated, the »
t-Move OFF« timer will be started. While the timer is running, the »POS
I
NDETERM
« State will become true. If the command is executed and properly fed back before the timer has run down,
»POS OFF« will become true. Otherwise, if the timer has expired »POS D
ISTURB
« will become true.
The following table shows how switchgear positions are validated:
States of the Digital Inputs Validated Switchgear Positions
Aux ON-I Aux OFF-I POS ON POS OFF POS
Indeterm
POS Disturb POS
State
0 0 0 0 1
(while a Moving
timer is running)
0
(while a Moving
timer is running)
0
Intermediate
1 1 0 0 1
(while a Moving
timer is running)
0
(while a Moving
timer is running)
0
Intermediate
0 1 0 1 0 0 1
OFF
1 0 1 0 0 0 2
ON
0 0 0 0 0
(Moving timer
elapsed)
1
(Moving timer
elapsed)
3
Disturbed
1 1 0 0 0
(Moving timer
elapsed)
1
(Moving timer
elapsed)
3
Disturbed
377 MRI4 DOK-HB-MRI4-2E