Operation Of The Sto Function - Danfoss VLT ISD 511 Operating Manual

VLT® Servo Drive System ISD 511
Operating Guide
Table 23: Commissioning Test using Libraries
Test steps
1 Run the application (all the ser-
vo drives are enabled).
2 Stop the application.
3 Disable all the servo drives.
4 Enable STO.
5 Disable STO.
6 Run the application (all the ser-
vo drives are enabled).
7 Enable STO.
8 Try to run the application (ena-
ble 1 or more servo drives).
9 Disable STO.
10 Try to run the application (ena-
ble 1 or more servo drives).
11 Send a reset signal via MC_Re-
set(_DDS).
12 Try to run the application (all
servo drives are enabled).

8.9 Operation of the STO Function

The STO function does not require any parameterization and is always enabled.
The ISD 511 servo drive provides STO status signals via the fieldbus.
All signals transmitted via the fieldbus are not part of the safety function and can only be used for operational purposes.
See the VLT® Servo Drive System ISD 510, DSD 510, MSD 510 (VLT® Flexmotion
• General information on how to access and map data objects.
• Information on a library provided to simplify the use of the fieldbus functions.
If STO is activated when the servo drive is enabled, an error code is issued.
If the drive is not enabled and STO is activated, it is not necessary to reset any STO error. It is sufficient to re-apply the supply voltage
to the STO terminals, before enabling the drive.
Danfoss A/S © 2023.08
Reason for the test step
Check that the application
can run.
–
–
Check that STO can be activa-
ted without error.
Check that STO can be deacti-
vated without error. No reset
is required.
–
Check that errors are gener-
ated correctly when STO is ac-
tivated while the servo drives
are running.
Checks that the STO function
is working correctly.
Check that the STO start is
still inhibited by the error sig-
nal.
Check whether reset is re-
quired.
–
–
Expected result for Danfoss library
Application runs as expected.
All servo drives are at speed 0 RPM.
All servo drives are disabled.
MC_ReadAxisInfo_DDS output SafeTorqueOff = True for
all servo drives on the corresponding line.
MC_ReadAxisInfo_DDS output SafeTorqueOff = False for
all servo drives on the corresponding line.
Application runs as expected.
Motors are torque free. Motors coast and stop after
some time.
MC_ReadAxisInfo_DDS output SafeTorqueOff = True
and
MC_ReadStatus_DDS output ErrorStop = True
and
MC_ReadAxisError_DDS output AxisErrorID = 0xFF80 on
all enabled servo drives.
Application does not run.
MC_ReadAxisInfo_DDS output SafeTorqueOff = False
and
MC_ReadStatus_DDS output ErrorStop = True
Application does not run.
MC_ReadAxisInfo_DDS output SafeTorqueOff = False
and
MC_ReadStatus_DDS output ErrorStop = False
Application runs as expected.
) Programming Guide for:
™
AQ377148425069en-000101 / 130R1213 | 93
Safety Concept