ABB Zenith ZTG 30 Operation, Maintenance And Installation Manual page 69

Automatic transfer switches
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5.6.3.1 LED indications
The following table illustrates the possi-
ble signals, and their meaning:
LED
Power LED, green
On, with two quick flashes per second Power supply present, and communication
Network LED, red
Status LED, green
The device has not yet sent Duplicate ID sequence on line.
1)
Table 5.12 Indication / Ekip Com DeviceNet -module in HMI
Fig. 5.18 Signals of Ekip Com DeviceNet -module
Indication
Off
On fixed Power supply and communication with the
Off
Device off line (with red LED off)
error conditions (with red LED on).
On, fixed
Device on line, and allocated on a master
On, flashing
Device on line, but not allocated on a
master (device ready for communication).
Off
On, fixed Device in bus off, or Network Power absent
On, flashing
I/O connection (cyclic data) in timeout.
69
Description
Power supply absent.
device present.
with device absent.
, or in
1)
(operating condition).
No error.
condition.

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