Parker Hannifin S.p.A. - Divisione S.B.C. LVD User’s Manual
24
TX
RX
/TX
/RX
+BR
-BR
0 V
0 V
RS-422
MASTER X3 X3 X3
NODE 1
NODE "n"
FINAL NODE
2.12 Backup
When you need to keep the drive electronics powered up during mains losses, for example
to preserve the simulated encoder function, it is sufficient to maintain power on terminals 1
and 2 of connector X8.
If bit b99.8 is set to one, the undervoltage alarm will be reset automatically when power is
restored.
2.13 Status LEDs
When the programming keypad is not connected, there are two LEDs visible on the drive
panel; the first indicates the presence of the electronics power supply, the second
communicates the following drive status information.
LED OFF - Drive disabled with no active alarms.
LED ON - Drive enabled.
LED flashing at high frequency (10Hz) - Drive enabled, no active alarms, but control of I
2
t
is active.
LED flashing slowly with pause between 2 sets of flashes - Drive disabled with active
alarm; you can identify the type of alarm by counting the number of LED flashes between the
pauses.
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