Peter electronic VersiSafe, Инструкции по сборке и пусконаладке

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VersiSafe 19
8. Failure monitoring
8.1 Types of error
The VersiSafe includes a number of facilities to to detect failures that could influence the safety
function of the module. The failure check is carried out on power up of the unit and in cycles
during normal operation.
If a failure occurs the output relays switch off. The failure state is indicated with the LEDs „ERR“
and „UH“ and the semiconductor output „ERR“ switches on.
With safety relevant failures the unit differentiates between external failures (broken wire / offset,
simultaneity failure, feedback circuit failure) and internal failures.
Broken wire / offset failures and feedback circuit failures can be stored or automatic reset after
removing the fault. (see chapter failure storing).
Broken wire / offset
The connection wires between VersiSafe and motor are continuously monitored for broken wire
and on a DC-voltage offset higher then U
an
.
In the case of a broken wire or offset failure the output relays are switched off immediately and the
LED „OUT“ lights yellow.
In addition a failure signal comes up with delay (on broken wire after 2s on offset failure after 8 s):
the semiconductor output „ERR“ switches on and the LED „ERR“ flashes with failure code 2 or 3
depending on the failure located either between L1-L2 or L1-L3.
Simultaneity of the measuring signals
As additional safety feature the 2 input signals (L2 and L3) are compared continuously. This
allows to detect also internal failures in one measuring channel.
If the signals are different for at least 2.5 s (one channel >U
an
the other <U
an
) simultaneity failure
is detected. The semiconductor output „ERR“ is switched on and the LED „ERR“ flashes with
failure code 5.
If the measured signals return to the same level <U
an
the error remains stored and the outputs are
disabled.
The simultaneity failure is only reset when both channels return to > U
an
. If after that both
channels drop below the setting value, get < U
an
the out relays will switch on.
Failure in feedback circuit X1-X2
As already mentioned the failure code „feedback circuit“ occurs when the outputs are disabled
and there is no connection between terminal X1-X2. The semiconductor output „ERR“ is switched
on and the LED ERR“ flashes with failure code 4.
Also when both input signals drop now to <U
an
and besides the open feedback loop no other
failures are present the feedback circuit failure remains active and the outputs remain disabled.
If the feedback circuit is now closed and the unit is on auto reset for external failures (see failure
storing) the output relays are enable and switch on.