Maintenance And Service For Sto - Danfoss VLT Midi Drive FC 280 Instruction Manual

Safe Torque Off (STO)
6.3.3 STO Commissioning Test
After installation and before first operation, perform a
commissioning test of the installation using STO.
Perform the test again after each modification of the
installation or application involving the STO.
NOTICE!
A successful commissioning test of the STO function is
required after the initial installation and after each
subsequent change to the installation.
To perform a commissioning test:
•
Follow the instructions in chapter 6.3.4 Test for
STO Applications in Manual Restart Mode if STO is
set to manual restart mode.
•
Follow the instructions in chapter 6.3.5 Test for
STO Applications in Automatic Restart Mode if STO
is set to automatic restart mode.
6.3.4 Test for STO Applications in Manual
Restart Mode
For applications where parameter 5-19 Terminal 37/38 SAFE
STOP is set to the default value [1] Safe Stop Alarm,
conduct the commissioning test as follows.
1. Set parameter 5-40 Function Relay to [190] Safe
Function active.
2. Remove the 24 V DC voltage supply to terminals
37 and 38 using the safety device while the
adjustable frequency drive drives the motor (that
is, the line power supply is not interrupted).
3. Verify that:
3a The motor coasts. It may take a long
time for the motor to stop.
3b The customer relay activates (if
connected).
3c If the LCP is mounted, alarm 68, Safe
Stop shows on the LCP. If the LCP is not
mounted, alarm 68, Safe Stop is logged
in parameter 15-30 Alarm Log: Error Code.
4. Reapply 24 V DC to terminals 37 and 38.
5. Ensure that the motor remains in the coasted
state, and the customer relay (if connected)
remains activated.
6. Send reset signal (via serial communication bus,
digital I/O or [Reset]/[Off Reset] key on the LCP).
7. Ensure that the motor becomes operational and
runs within the original speed range.
MG07A122
Instruction Manual
The commissioning test is successfully completed when all
the above steps are passed.
6.3.5 Test for STO Applications in
Automatic Restart Mode
For applications where parameter 5-19 Terminal 37/38 SAFE
STOP is set to [3] Safe Stop Warning, conduct the commis-
sioning test as follows:
1.
2.
3.
4.
The commissioning test is successfully completed when all
the above steps are passed.
NOTICE!
See the warning on the restart behavior in
chapter 6.1 Safety Precautions for STO.

6.4 Maintenance and Service for STO

•
•
The functional test consists of two parts:
•
•
When all the steps are completed successfully, the
functional test is successful.
Danfoss A/S © 11/2015 All rights reserved.
Remove the 24 V DC voltage supply to terminals
37 and 38 by the safety device while the
adjustable frequency drive drives the motor (that
is, the line power supply is not interrupted).
Verify that:
2a The motor coasts. Note that it may take
a long time for the motor to stop.
2b The customer relay activates (if
connected).
2c Warning 68, Safe Stop W68 shows on the
LCP if the LCP is mounted.
2d If the LCP is not mounted, Warning 68,
Safe Stop W68 is logged in
parameter 15-30 Alarm Log: Error Code.
Reapply 24 V DC to terminals 37 and 38.
Ensure that the motor becomes operational and
runs within the original speed range.
The user is responsible for security measures.
The adjustable frequency drive parameters can be
protected with password.
Basic functional test.
Diagnostic functional test.
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