Operation; Normal Operation; Faulty Operation - ABB ETL600 Instruction Manual

ETL600
8.2.

Operation

8.2.1.

Normal Operation

During operation, the status of the equipment can be ascertained from
the LED signals on the front plates of the individual modules,
respectively by viewing the equipment status with the user interface
HMI600.
In normal fault free operation, only the green stand-by LED 'RDY' on
all modules are lit. All the other red LEDs are for alarms and they
should be off. Checking the equipment status via HMI600 produces
the response 'NO ALARM'.
An inadmissible operating condition is signaled by the red LED 'AL' on
the front of
q ueried via HMI600.
Send and receive command counters and an event recorder are
standard equipment. The display of both can be done by means of the
HMI600. The counters and the event log retain their information even if
the supply is interrupted because they are stored in a nonvolatile
memory.
In case a PC with HMI600 software is available for continuous
monitoring of the PLC equipment, the 'Alarm monitoring' option in the
HMI600 can be enabled to keep both the local and remote equipment
under continuous monitoring.
8.2.2.

Faulty Operation

Refer also to chapter 9 ' Troubleshooting '.
If the ETL600 system is in normal operation, a green LED 'RDY' on the
front plate of P4LT is on to indicate that the system is ready.
A faulty operation will be indicated by red LEDs. In case there is a fault
on the line or with the modules, red LEDs in the field above the 'HMI'
Sub-D connector light up. The description of the various alarm LEDs
on P4LT is as follows:
•
The red LED ('P4LT') at the top right side: There is a problem with
the hardware of P4LT (DSPs, Flash EPROM, UART etc.).
•
The yellow LED ( U
that the equipment is not in normal operation mode. The link is OK.
•
The red LED ('LNK', link alarm) at the bottom left side: It indicates
that the link for one of the channels is down. This could be
because of not receiving the Rx RF at all or unsatisfactory level of
the received pilot level.
•
The red LED ('HW', hardware alarm) at the bottom right side: It
indicates that there is a problem with the other hardware of the
ETL600. The P4LT may be functioning OK.
Operation and Maintenance
1KHW001489-EN
the unit concerned and the nature of the alarm can be
Warning) at the middle left side: It indicates
,
ABB Switzerland Ltd
November 2005 8-5