2. Initiate safety operation:
→
Interrupt the FQM power supply.
Information: Reaction time upon interruption is up to 10 seconds.
→
When leaving the end position, start the operating time measurement.
➥
The FQM end position switch indicates the unseating from end position
by signal change.
➥
A fail safe fault signal (“FS fault” signal) must be issued.
→
Stop operating time monitoring when reaching the fail safe end position.
➥
The FQM end position switch indicates that end position has been reached
by signal change.
➥
The FQM operating time must comply with the indication on the name
plate for 90° swing angle or the specified time during commissioning.The
permissible operating time tolerance –50 %/+100 %.
→
Check whether valve is completely closed.
3. Restore voltage supply after FQM check.
➥
FQM starts automatic initialisation (spring is wound).
➥
After successful initialisation, the “FS ready” signal is issued once initialisation
is complete. Initialisation time must be < 2 minutes.
8.4.3. Check safe end position signal
Configuration
This test applies for the “SIL function” configuration = ”Safe end position feedback”.
Test procedure
The end position feedback must be immediately issued once the actuator reaches
the end position.
Only the actually used (assigned) contacts must be checked. In particular for variant
1 (➭ page 6, Valid device types), use of the NC contacts is not permitted; checking
is therefore not required.
Test sequence
1. Operate FQM via actuator into intermediate position.
→
Check FQM end position switch:
➥
End position OPEN not reached signal (output signal inactive), i.e.:
-
LSO 38-20=NC output (NC contact) = closed
-
LSO 19-21=NO (NO contact) output = open
➥
End position CLOSED not reached signal (output signal inactive), i.e.:
-
LSC 35-23=NC output (NC contact) = closed
-
LSC 22-24=NO (NO contact) output = open
➥
No fail safe fault signal may be issued (“FS ready” signal).
2. Start operation command in direction CLOSE.
→
Wait until FQM end position switch trips or end position CLOSED has
been reached.
→
Check actuator reaction:
→
Operation stopped when reaching end position switch CLOSED?
➥
End position OPEN not reached signal (output signal inactive), i.e.:
-
LSO 38-20=NC output (NC contact) = closed
-
LSO 19-21=NO (NO contact) output = open
➥
End position CLOSED reached signal (output signal active), i.e.:
-
LSC 35-23=NC output (NC contact) = open
-
LSC 22-24=NO (NO contact) output = closed
➥
No fail safe fault signal (“FS ready” signal) must be issued.
26
Tests and maintenance with non safety-related actuators
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