VAMP 257
Feeder and motor manager
Technical description
VAMP Ltd
102
VAMP 24h support phone : +358 (0)20 753 3264
VM257.EN002
2.8.
Self-supervision
The functions of the micro controller and the associated
circuitry, as well as the program execution are supervised by
means of a separate watchdog circuit. Besides supervising the
manager, the watchdog circuit attempts to restart the micro
controller in a fault situation. If the restarting fails, the
watchdog issues a self-supervision alarm because of a
permanent internal fault.
When the watchdog circuit detects a permanent fault, it always
blocks any control of other output relays (except for the self-
supervision output relay) until the fault has disappeared.
In addition, the internal supply voltage is supervised. Should
the auxiliary supply of the manager disappear, an IF alarm is
automatically given because the IF output relay functions on a
working current principle. This means that the IF relay is
energized when the auxiliary supply is on and within the
permitted range.
2.9.
Clock synchronisation
The internal clock of the manager can be externally
synchronised. Thus, the events and recordings are time
stamped very accurately.
Clock synchronisation parameters:
Parameter
Value
Unit
Description
Display SySrc
Internal;
DIx
Clock synchronisation
source
SyncDI
-;DI1; DI2;
…DI32
-
The digital input used for
clock synchronisation
SyOS
ms
Synchronisation
correction
Setting
values
CkTrim
ppm Real time clock trim
MsgCnt
The number of
synchronisation messages
Dev
ms Latest time deviation
FilDev
Filtered synchronisation
deviation
I ms
Cumulative
deviation
MaxAdj
ms
The maximum adjustment
of internal clock
Recorded
values
MinAdj
ms
The minimum adjustment
of internal clock
