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
frequency converter drives the motor (that is, the
mains 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 fieldbus, 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.
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.
Remove the 24 V DC voltage supply to terminals
37 and 38 by the safety device while the
frequency converter drives the motor (that is, the
mains supply is not interrupted).
2.
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
.
3.
Reapply 24 V DC to terminals 37 and 38.
4.
Ensure that the motor becomes operational and
runs within the original speed range.
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 user is responsible for security measures.
•
The frequency converter parameters can be
protected with password.
The functional test consists of 2 parts:
•
Basic functional test.
•
Diagnostic functional test.
When all the steps are completed successfully, the
functional test is successful.
Basic functional test
If the STO function has not been used for 1 year, conduct
a basic functional test to detect any failure or malfunction
of STO.
1.
Ensure that
parameter 5-19 Terminal 37/38 SAFE
STOP
is set to
*[1] Safe Stop Alarm
.
2.
Remove the 24 V DC voltage supply for terminals
37 and 38.
3.
Check if the LCP displays the alarm
alarm 68, Safe
Stop
.
4.
Verify that the frequency converter trips the unit.
5.
Verify that the motor is coasting and stops
completely.
6.
Initiate a start signal (via fieldbus, digital I/O, or
the LCP), and verify that the motor does not start.
7.
Reconnect the 24 V DC voltage supply to
terminals 37 and 38.
8.
Verify that the motor is not started automatically
and restarts only by giving a reset signal (via
fieldbus, digital I/O, or [Reset]/[Off Reset] key on
the LCP).
Safe Torque Off (STO)
Operating Instructions
MG07A102
Danfoss A/S © 11/2015 All rights reserved.
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