Safety engineering
Functional test
Monitoring the safety function with a PLC
11
11.4
11.4.3

11.4−5
EDSVF9383V EN 7.1−04/2012
For the functional test, check both disconnecting paths separately.
1. disconnecting path: Pulse inhibit via safety relay K
SR
The individual tests are passed if the correct states given in the table result.
Specification Correct status
Individual test Input relay activation (X11/34) Output feedback (X11/K31)
Pulse inhibit LOW HIGH
Pulse enable HIGH LOW
2. disconnecting path: Controller inihibit
Requirement for the test:
Æ’ "Quickstop" (QSP) function deactivated
Æ’ "Automatic DC injection brake" deactivated (C0019 = 0)
Æ’ Pulses enabled by the safety relay K
SR
(X11/34 = HIGH)
The individual tests are passed if the correct states given in the table result.
Specification Correct status
Individual test X5/28 Setpoint Output DIGOUT
Controller inhibit LOW
n
set
> 0
HIGH
Controller enable HIGH LOW
Functional test not passed
If an individual test results in an impermissible status, the functional test is
not passed.
Æ’ The drive or machine has to be shut down immediately.
Æ’ Commissioning is not permitted until the safety function operates
correctly.
Functional test within the
inspection interval