Safe Torque Off (Sto) - Danfoss VLT HVAC Drive FC 102 Operating Manual

Electrical Installation

4.8.5 Safe Torque Off (STO)

To run STO, extra wiring for the frequency converter is
required. Refer to VLT
Operating Guide for further information.
4.8.6 Configuring RS485 Serial
Communication
4 4
RS485 is a 2-wire bus interface compatible with multi-drop
network topology, and it contains the following features:
•
Either Danfoss FC or Modbus RTU communication
protocol, which are internal to the drive, can be
used.
•
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 the specifications of the protocol, making
more protocol-specific parameters available.
•
Option cards for the drive are available to provide
more communication protocols. See the option
card documentation for installation and operation
instructions.
•
A switch (BUS TER) is provided on the control
card for bus termination resistance. See
Illustration 4.27.
For basic serial communication set-up, perform the
following steps:
1. Connect RS485 serial communication wiring to
terminals (+)68 and (-)69.
1a
1b
2. Select the following parameter settings:
2a
2b
2c
36
®
VLT
®
Frequency Converters Safe Torque Off
Use shielded serial communication cable
(recommended).
See chapter 4.3 Grounding for proper
grounding.
Protocol type in parameter 8-30 Protocol.
Drive address in parameter 8-31 Address.
Baud rate in parameter 8-32 Baud Rate.
Danfoss A/S © 02/2017 All rights reserved.
HVAC Drive FC 102
Illustration 4.28 Serial Communication Wiring Diagram
61
68 +
RS485
69
MG16D402