Danfoss VLT AutomationDrive FC 360 Design Guide

l A format used for texts.
9.2.2 FC with Modbus RTU
The FC protocol provides access to the control word and bus reference of the drive.
The control word allows the Modbus master to control several important functions of the drive:
l Start.
l Stop of the drive in various ways:
¢ Coast stop.
¢ Quick stop.
¢ DC brake stop.
¢ Normal (ramp) stop.
l Reset after a fault trip.
l Run at various preset speeds.
l Run in reverse.
l Change of the active setup.
l Control of the 2 relays built into the drive.
The bus reference is commonly used for speed control. It is also possible to access the parameters, read their values, and where possible,
write values to them. Accessing the parameters offers a range of control options, including controlling the setpoint of the drive when its
internal PI controller is used.
9.3 FC Protocol Network Configuration
To enable the FC protocol for the drive, set the following parameters.
Table 31: Parameters to Enable the Protocol
Parameter Setting
Parameter 8-30 Protocol FC
Parameter 8-31 Address 1–126
Parameter 8-32 Baud Rate 2400–115200
Parameter 8-33 Parity/Stop Bits Even parity, 1 stop bit (default)
9.4 FC Protocol Message Framing Structure
9.4.1 Content of a Character (byte)
Each character transferred begins with a start bit. Then 8 data bits are transferred, corresponding to a byte. Each character is secured via
a parity bit. This bit is set at 1 when it reaches parity. Parity is when there is an equal number of 1s in the 8 data bits and the parity bit in
total. A stop bit completes a character, consisting of 11 bits in all.
Start
bit
Even
parity
Stop
bit
0
1
2
3 4 5 6 7
e95na036.10
Figure 51: Content of a Character
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Design Guide | VLT® AutomationDrive FC 360

Danfoss VLT AutomationDrive FC 360 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 360
Category	DC Drives
Language	English