Module 9144 Safety Self-Test / Emergency Stop Test - HEIDENHAIN iTNC 530 HSCI Technical Manual

940

Module 9144 Safety self-test / Emergency stop test

PLC module 9144 is used to activate special functions regarding the safety
self-test or emergency-stop test, as well as the functional safety (FS) of a
HEIDENHAIN control system.
The test can be started directly through the PLC module. Also, a PLC soft key
can be made available through the PLC program if all minimum requirements
are fulfilled so that the user can start the emergency stop test directly by soft
key.
It must be ensured by the PLC program that the following minimum
requirements are met before the self-test is started:
All guard doors must be closed and, if possible, locked.

No active machining operation is allowed.

Further constraints may apply, depending on the control model used:

Safety self-test and emergency-stop test for controls with or without
HSCI and without functional safety (FS)
The PLC program decides whether and at what time a repeated test is to be
run or suggested after the control has been switched on. The PLC program
can use Module 9144 to start the test immediately, taking the minimum
requirements (mode 0) into account.
If the PLC program wants to test the brakes beforehand, it must command
the brake test through PLC module 9143. Before the repeated self test
begins, the PLC program must switch off the drives.
The marker M4190 is set and the marker M4189 is reset when a test is

started.
The marker M4189 is set and the marker M4190 is reset when the entire

test cycle has been completed.
The marker M4192 is set if there is a request for the machine control voltage

to be switched on.
Module 9144 and the PLC markers are used to start the repeated self-test
through the PLC and to fully automate the self-test. The test is started by
Module 9144 and at first triggers an external emergency stop through the
signals MC.RDY and STO.A.G. Then the test continues up to the point at
which the machine control voltage must be switched back on. This can be
done by the operator on request by the NC, or the procedure can be
automated such that marker 4192 is evaluated and the machine control
voltage is switched on by the PLC. As soon as the control voltage has been
switched back on, the self-test is continued up to completion.
HEIDENHAIN Technical Manual iTNC 530 HSCI