List Of Alarms And Corrective Actions - ABB ETL600 Instruction Manual

ETL600
Module R1BC, i.e. the "alarm" condition is the same as the "power off"
state of the equipment (relay coil not energized). On all modules the
user can still choose – by using the corresponding output contacts -
whether the alarm contact shall be "normally open" or "normally
closed".
The solid-state outputs on G4AI are operated differently. An alarm
condition is signaled with a conducting (energized) FET. Therefore the
"alarm" condition is not the same as the "power off" state of the
equipment.
Both type of output contacts are activated only after the programmed
alarm delay time has elapsed. The same applies for the alarm hold
time.
The LEDs of the outputs on G4AI correspond with the state of the
contacts, i.e. they also light up only if the alarm delay time has elapsed
and they will light on for the duration of the alarm hold time.
Question: Data communication over NSK600 modems with datarates
of 2400 bps or higher doesn't work. What could be the reason?
Answer: NSK600 modems with datarates of 2400 bps or higher
require equalization of the APLC channel used by the modem for
proper operation. Channel equalization is done with the help of allpass
filter and equalizer. Refer to document 1KHW001494 "APLC Channel
equalization" in the Annex for details.
9.6.

List of alarms and corrective actions

In what follows, lists of alarm text messages and their corresponding
explanation and fault elimination instructions ( in italic ) are given for
each alarm category PLC, TPE and DATA.
Troubleshooting
1KHW001489-EN
November 2005
ABB Switzerland Ltd
9-15