Test Pulse Duration Parameter - WAGO -I/O-SYSTEM 750 Manual

104 Commissioning
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8.3.4.9

Test Pulse Duration Parameter

No test pulses when test pulse duration = 0 ms!
If you have set the test pulse duration of a digital power output (1 or 2-channel) to
the value "0 ms (off)", the F I/O module does not perform a cyclic diagnostic test
of the digital power output. However, to achieve a risk reduction to SIL3 acc. to
EN 62061 or PL e acc. to EN ISO 13849-1, the diagnostic test must be triggered
automatically by the safe controller. The time interval for repeating the diagnostic
test may not exceed 24 hours.
Possible variants:
a) Protected cable routing
1. The F I/O module executes the diagnostic test to check the digital
b) Unprotected cable routing
1. The F I/O module executes the diagnostic test to check the digital
2. To make sure that short circuits between outputs are also detected by
Safe response time depends on the test pulse duration!
If you connect the load from the digital power output Ox+ to a common reference
potential (e.g., B. 0 V) and you change the test pulse duration, the response time
of the digital power output is extended. See section "Technical Data" > ... >
"Response Times".
The digital power outputs are tested each minute using test pulses. The Test
Pulse Duration parameter is used to set the duration of the test pulse for one
digital power output. If the test pulse duration is set to "0 ms", the test pulse for
the respective digital power output is deactivated. The test pulse duration must
be adjusted if you, for example, when you connect a capacitive load to the digital
power output.
Each digital power output is switched off in the cycle of one minute for the
duration of the test pulse duration set. The F I/O module tests whether the digital
outputs can be switched off and whether there are short circuits to external
voltages on the output cable.
Manual
Version 1.4.2, valid from HW/SW Version 01/02
750-667/000-003 4FDI/4FDO 24V/2A PROFIsafe V2 iPar
power outputs if all outputs with a test pulse duration of "0 ms (off)"
are switched off. The shutdown must last for 500 ms.
power outputs if all outputs with a test pulse duration of "0 ms (off)"
are switched off. The shutdown must last for 500 ms.
the diagnostic test in unprotected cable routes, the outputs must be
switched off sequentially. An interval of 500 ms must be maintained
between each output that is switched off.
The diagnostic test is successfully concluded when all outputs are
switched off at the same time.
WAGO-I/O-SYSTEM 750