ABB ETL600 Instruction Manual page 224

ABB Switzerland Ltd
Caution
Caution
If the loop test fails in at least two consecutive attempts, the equipment
must be taken out of service and tested according to b) below.
Caution
b) Removing the equipment from service for testing:
1. Switch off the equipment and open all the isolating terminals to the
protection afterwards.
2. Switch on the equipment again by closing the circuit breakers.
3. Choose the menu Equipment / Tuning & testing , click the Test
NSD600 button and set the local test mode by clicking Set local
loop .
4. Check that the unit is indeed in the local test mode (corresponding
Warning message after uploading status 'Warning: local loop
active').
5. Inject commands at the local terminal blocks and check the local
command outputs for correct operation (to be done in relation to
the Programming and Testing Instructions in the annex).
6. Choose the menu Equipment / Tuning & testing , click the Test
NSD600 button and set the local test mode to off by clicking
Normal operation .
7. Check that the unit is indeed in the normal operation mode (no
alarm and warning messages after uploading equipment status
'No alarm'; if alarm messages appear refer to section 9.6 ).
8. Initiate a manual loop test: from the Equipment menu point to
Commissioning and maintenance and click NSD600 send
looptest .
9. Providing no failure has been observed and all the alarm signals
have reset, close the isolating terminals again.
8-8
1KHW001489-EN
The 'RESET' button on the module G4AI should not
be pressed while executing routine tests during
normal operation, as this causes re-initialization of
the module and blocks it for some seconds.
During this time no commands can be transferred.
During routine tests with the ETL600 in operation
the " Reset " item in the Equipment menu of the
HMI600 should not be activated, as this causes the
equipment to be re-initialized and thus be blocked
for some seconds.
During this time no commands can be transmitted.
Tuning & testing procedures - refer to b) below – will
interrupt the normal operation of the equipment.
November 2005
ETL600
Operation and Maintenance