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

Electrical Installation
NOTICE!
Disconnect power to the adjustable frequency drive
before changing switch positions.
1. Remove the LCP (local control panel) (see
Figure 4.26).
4 4
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.
Figure 4.26 Location of Terminal 53 and 54 Switches

4.8.5 Safe Torque Off (STO)

To run STO, additional wiring for the adjustable frequency
drive is required. Refer to VLT
Safe Torque Off Instruction Manual for further information.

4.8.6 RS485 Serial Communication

Connect RS485 serial communication wiring to terminals
(+)68 and (-)69.
•
Use shielded serial communication cable
(recommended)
•
See chapter 4.3 Grounding for proper grounding.
34
®
VLT AutomationDrive FC 302
®
Adjustable Frequency Drives
Danfoss A/S © 06/2015 All rights reserved.
61
68
69
Figure 4.27 Serial Communication Wiring Diagram
For basic serial communication set-up, select the following:
1. Protocol type in parameter 8-30 Protocol.
2. Adjustable frequency drive address in
parameter 8-31 Address.
3. Baud rate in parameter 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 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 adjustable frequency drive
are available to provide additional communi-
cation protocols. See the option card
documentation for installation and operation
instructions.
+
RS-485
MG34U422