Network Configuration; Fc Protocol Message Framing Structure - Danfoss VLT DriveMotor FCP 106 Programming Manual

RS485 Installation and Set-...
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Reset after a fault trip.
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Run at various preset speeds.
3 3
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Run in reverse.
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Change of the active set-up.
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Control of the 2 relays built into the frequency
converter.
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 frequency converter when
its internal PI controller is used.
18
®
VLT
DC Brake stop.
Normal (ramp) stop.
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DriveMotor FCP 106/FCM 106

3.3 Network Configuration

To enable the FC protocol for the frequency converter, set
the following parameters.
Parameter
Parameter 8-30 Protocol
Parameter 8-31 Address
Parameter 8-32 Baud
Rate
Parameter 8-33 Parity /
Stop Bits
Table 3.3 Parameters to Enable the Protocol

3.4 FC Protocol Message Framing Structure

3.4.1 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, thus consisting of 11 bits
in all.
Start 0 1
bit
Illustration 3.5 Content of a Character
Setting
FC
1–126
2400–115200
Even parity, 1 stop bit (default)
2 3 4 5 6 7 Even
Parity bit
Stop
MG03N202