Safe Torque Off (Sto); Rs485 Serial Communication - Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual

Electrical Installation
1. Remove the LCP (local control panel) (see
Illustration 4.26).
2. Remove any optional equipment covering the
switches.
3. Set switches A53 and A54 to select the signal
type. U selects voltage, I selects current.
Illustration 4.26 Location of Terminal 53 and 54 Switches

4.8.5 Safe Torque Off (STO)

To run STO, additional wiring for the frequency converter is
®
required. Refer to VLT Frequency Converters Safe Torque Off
Operating Instructions for further information.

4.8.6 RS485 Serial Communication

Connect RS485 serial communication wiring to terminals
(+)68 and (-)69.
•
Use screened serial communication cable
(recommended).
•
See chapter 4.3 Grounding for proper grounding.
MG34U402
Operating Instructions
Illustration 4.27 Serial Communication Wiring Diagram
For basic serial communication set-up, select the following:
1.
2.
3.
•
•
•
•
Danfoss A/S © 06/2015 All rights reserved.
61
68 +
RS-485
69
Protocol type in parameter 8-30 Protocol.
Frequency converter address in
parameter 8-31 Address.
Baud rate in parameter 8-32 Baud Rate.
2 communication protocols are internal to the
frequency converter.
Danfoss FC
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 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 4
33