Safe Torque Off (Sto); Rs-485 Serial Communication - Danfoss VLT AQUA Drive FC 202 Instruction Manual

Electrical Installation
1. Remove the local control panel (see Figure 4.10).
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.
4 4
Figure 4.10 Location of Terminals 53 and 54 Switches

4.8.5 Safe Torque Off (STO)

To run Safe Torque Off, additional wiring for the adjustable
frequency drive is required, refer to Safe Torque Off
Instruction Manual for Danfoss VLT
Drives for further information.
22
®
VLT AQUA Drive FC 202
®
Adjustable Frequency
Danfoss A/S © 10/2014 All rights reserved.

4.8.6 RS-485 Serial Communication

Connect RS-485 serial communication wiring to terminals
(+)68 and (-)69.
•
Use shielded serial communication cable
(recommended)
•
See chapter 4.3 Grounding for proper grounding
61
68
69
Figure 4.11 Serial Communication Wiring Diagram
For basic serial communication set-up, select the following:
1. Protocol type in 8-30 Protocol.
2. Adjustable frequency drive address in
8-31 Address.
3. Baud rate in 8-32 Baud Rate.
•
Two communication protocols are internal to the
adjustable frequency drive.
Danfoss FC
Modbus RTU
•
Functions can be programmed remotely using
the protocol software and RS-485 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 along with
making additional protocol-specific parameters
available.
•
Option cards which can be installed in the
adjustable frequency drive are available to
provide additional communication protocols. See
the option-card documentation for installation
and instruction manual.
+
RS-485
MG20MA22