994 HEIDENHAIN Technical Manual MANUALplus 620
The following error messages can occur during the test:
 Timeout during self-test
At least one HSCI participant has not answered a request or has not 
correctly detected a signal condition to be tested. Possible causes:
• HSCI participant/device is defective
• HSCI cabling is faulty
• The hardware components used and/or software are not compatible 
with each other.
 Error during self-test
The sequence of the individual test steps and processes in the self-test do 
not fulfill the requirements. A signal condition to be tested is not in the 
required initial condition. Possible causes:
• HSCI participant/device is defective
• HSCI cabling is faulty
• The hardware components used and/or software are not compatible 
with each other.
 Error in self-test
Has same causes as Error during self-test. However, after the cause of 
error is corrected (e.g. by closing the guard door), the test can be continued 
without the MANUALplus 620 having to restart.
Module 9144 Configuration of the 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 self test 
directly by soft key.
With PLC Module 9144 you can specify whether a repeated self-test should 
be started immediately (mode 0) or by the user via soft key (mode 1).
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.