Danfoss VLT Midi Drive FC 280 Instruction Manual

Basic functional test
If the STO function has not been used for one 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 alarm 68, Safe Stop.
4. Verify that the adjustable frequency drive trips
the unit.
5. Verify that the motor is coasting and stops
completely.
6. Initiate a start signal (via serial communication
bus, 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
serial communication bus, digital I/O or [Reset]/
[O Reset] key on the LCP).
Diagnostic functional test
1. Verify that warning 68 Safe Stop and alarm 68 Safe
Stop do not occur when 24 V supply is connected
to terminals 37 and 38.
2. Remove the 24 V supply for terminal 37, and
verify that the LCP displays alarm 188, STO
Function Fault if the LCP is mounted. If the LCP is
not mounted, verify that alarm 188, STO Function
Fault is logged in parameter 15-30 Alarm Log: Error
Code.
3. Reapply 24 V supply to terminal 37, and verify
that resetting the alarm is successful.
4. Remove the 24 V supply for terminal 38 and
verify that the LCP displays alarm 188 STO
Function Fault if the LCP is mounted. If the LCP is
not mounted, verify that alarm 188, STO Function
Fault is logged in parameter 15-30 Alarm Log: Error
Code.
5. Reapply 24 V supply to terminal 38 and verify
that resetting the alarm is successful.
Safe Torque O (STO)
VLT
®
Midi Drive FC 280
36 Danfoss A/S © 11/2015 All rights reserved. MG07A122
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Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English