Validation of the encoTRive safety functions
TR-Electronic GmbH 2022, All Rights Reserved
Printed in the Federal Republic of Germany
Page 28 of 35
TR-EMO-BA-GB-0023 v00
04/20/2022
7.2 SS1 function
As with the STO function, the safety function is triggered, when the safety circuit is interrupted e.g. by
an emergency stop switch. It must then be checked whether the customer-specific time set in the fac-
tory matches the actual delay time, until the STO function is triggered.
During the delay time the drive continues running unchanged according to the current movement
command.
No automatic speed reduction takes place. If necessary, braking must be performed
by the user with an appropriate braking ramp!
For more accurate assessment, on triggering of the SS1 function the WARNING “4096” must be out-
put in PNU 953 via the PROFINET interface.
During validation the behavior of the drive during the delay time must also be observed.
The safe state (PROFINET PNU 947 = 400, message output C1 = 24 VDC) is only reached at the
end of the delay time with triggering of the STO-function. Therefore, maintenance of a preset
movement profile is not guaranteed!
As with direct triggering of the STO function, it is necessary to check whether the motor torque has
been switched off.
In order to restart the drive after the SS1/STO function has triggered, at least 1 s must pass, then the
safety circuit must be closed again via the inputs used, the error must be acknowledged via the
PROFINET interface and after this the drive controller must be activated again.