Safe Torque Off (Sto); Installation Check List - Danfoss VLT Decentral Drive FCD 302 Operating Manual

Electrical Installation
1. Protocol type in parameter 8-30 Protocol.
2. Frequency converter address in
parameter 8-31 Address.
3. Baud rate in parameter 8-32 Baud Rate.
Two communication protocols are internal to the
frequency converter.
•
Danfoss FC
4 4
•
Modbus RTU
Functions can be programmed remotely using the protocol
software and RS485 connection or in parameter group 8-**
Communications and Options.
Selecting a specific communication protocol changes
various default parameter settings to match that protocol's

4.17 Installation Check List

Before completing installation of the unit, inspect the entire installation as detailed in Table 4.8. Check and mark the items
when completed.
Inspect for
Auxiliary
equipment
Cable routing
Control wiring
EMC
considerations
24
VLT
Description
•
Look for auxiliary equipment,
switches, disconnects, or input
fuses/circuit breakers located on
input power side of the frequency
converter, or output side to motor.
Examine their operational readiness
and ensure that they are ready in
all respects for operation at full
speed.
•
Check function and installation of
any sensors used for feedback to
the frequency converter.
•
Remove power factor correction
caps on motor(s), if present.
Ensure that input power, motor wiring,
and control wiring are separated or in 3
separate metallic conduits for high
frequency noise isolation.
•
Check for broken or damaged wires
and connections.
•
Check the voltage source of the
signals, if necessary.
•
The use of shielded cable or twisted
pair is recommended. Ensure that
the shield is terminated correctly at
both ends.
Check for proper installation regarding
electromagnetic compatibility.
Danfoss A/S © 11/2016 All rights reserved.
®
Decentral Drive FCD 302
specifications and makes additional protocol-specific
parameters available.
Option cards for the frequency converter are available to
provide additional communication protocols. See the
option card documentation for installation and operation
instructions.

4.16 Safe Torque Off (STO)

To run STO, additional wiring for the frequency converter is
required. Refer to VLT
Operating Instructions for further information.
☑
Inspect for
Environmental
considerations
Cooling
clearance
Fusing and
circuit
breakers
Input and
output power
wiring
Switches
Grounding
Installation
box and
electronics
part
®
Frequency Converters Safe Torque Off
Description
See equipment label for the maximum
ambient operating temperature limits.
Temperature is not to exceed 40 °C
(104 °F). Humidity levels must be 5–
95% non-condensing.
Units require top and bottom clearance
adequate to ensure proper airflow for
cooling.
Check that all fuses are inserted firmly
and in operational condition and that
all circuit breakers are in the open
position. Check for proper fusing or
circuit breakers.
•
Check for loose connections.
•
Check for proper fusing or circuit
breakers.
Ensure that all switch and disconnect
settings are in the proper position.
The equipment requires a dedicated
ground wire from its chassis to the
plant ground. Check for good ground
connections that are tight and free of
oxidation.
Ensure the installation box and the
electronics part is properly closed.
Check that all 4 fastening screws are
tightened with the right torque.
☑
MG04F502