Self-Test - Lenord, Bauer GEL 3011 Betriebsanleitung

4 Function
State Identifier
Internal fault Self-tested hardware faulty ⇒ Relay de-energised, DIAG LED:
S2
S3 External
fault
Transition Identifier
T0

Self-test

T1.0 Start operation
T1.1 Limit exceeded
T1.2 Limit no longer excee-
ded
T1.3 Inhibit time elapsed
T1.4 Enable
T1.5 Inhibit time active
T2 Operating time
T3, T4 Fault present
T5 Self-test request
T6 Self-test fault
4.2 Self-test
After switching on, a self-test is run automatically on the acceleration sensors and re-
lays. Readiness is signalled via the DIAG LEDs and to the installation control system
via the bus interface.
Continuous monitoring ensures the function of both acceleration sensors is tested in
operation. In this way a defective sensor is reliably detected; the device then signals
the failure of the sensor via the fieldbus and opens the safety circuit.
The self-test can be also triggered by the installation control system in accordance with
the fieldbus protocol. During this process the acceleration sensors are subjected to a
function test and each relay switched once, as a result the safety circuit is opened. The
safety function is then re-started afterwards.
To ensure the safety circuit is not interrupted, two tower oscillation monitors must be
connected in parallel; these sensors are then not allowed to be subjected to a self-test
simultaneously. This is the only function from the non-safety-related section of the
tower oscillation monitor (fieldbus communication) that affects the safety-related sec-
tion.
38
Self-test
Explanation
State 4 (other DIAG LED: state 5)
Externally controlled hardware faulty (redundant branch) ⇒ Re-
lay de-energised, DIAG LED: State 5 (other DIAG LED: State 4)
Condition/function
Self-test active
Self-test successfully completed
Acceleration measured exceeds the limit for lon-
ger than the trigger delay set
Acceleration measured within the limits
Measured accelerations below the limits set for
the duration of the inhibit time
Normal operation: Measured acceleration within
the limits
Inhibit time not yet elapsed
Fault no longer present
Sensor or relay fault occurred
Self-test triggered via the fieldbus
Self-test fault occurred
Lenord + Bauer
GEL 3011