STO
–
Safe Torque OFF
Functional description
Operating Manual Rev. 1.3
www.engelantriebe.de
page 13
6.2.4
Firmware
The STO functionality is supported from firmware version V4.00 of the HFI series of integrated drives. The pulse inhibit of
the STO is hardware-based, i.e. the firmware of the integrated drives has no influence on the STO safety function. The
firmware is
not
safety-relevant.
The pulse inhibit is available at all times and works independently of other settings and operating modes of the integrated
drives.
The firmware monitors the internal signal voltages of the STO channels as well as the temperature of the STO module. In
the event of impermissible operating conditions, error messages are triggered that switch off the drive via its standard
functionality.
From version V6.403, the parameterisation software DSerV supports the STO functionality.
Figure 6-5: DSerV with STO visualisation
Note!
The parameterisation software
DSerV
is described in the operating manual of the HFI series.
STO status indication
and error indication
Internal signal voltages
and module temperature
STO STO
input signals status indication
STO1= 24
V / STO2= 24
V
STO1= 0
V / STO2= 24
V
STO1= 24
V / STO2= 0
V
STO1= 0
V / STO2= 0
V
