Process Words; Control Word According To Fc Profile (Ctw) - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide

Process Words

"
The block of process words is divided into
two blocks of 16 bits, which always occur
in the defined sequence.
Control telegram (master=>slave)
Control telegram (slave=>master)

Control Word According to FC Profile (CTW)

"
To select FC protocol in the control word, set par.
8-10 Control word rofile to FC protocol [0]. The
control sends commands from a master (PLC or
PC) to a slave (frequency converter).
Explanation of the Control Bits
Bit
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
Bits 00/01
Use bits 00 and 01 to choose between the four
reference values, which are pre-programmed in par.
3-10 Preset Reference according to the shown table:
default setting ( )
*
How to Programme
Bit value = 0
Reference value
Reference value
DC brake
Coasting
Quick stop
Freeze output
Ramp stop
No function
No function
Ramp 1
Data not valid
Relay 01 open
Relay 02 open (FC 302 only)
Parameter set-up
Parameter set-up
No function
display text [ ] value for use in communication via serial communication port
MG.33.B4.02 - VLT is a registered Danfoss trademark
PCD 1
Control word
Status word
Master => slave
1 2
CTW MRV
external selection msb
Relay 02 active (FC 302 only)
PCD 2
Reference-value
Present outp.frequency
3 .....
PCD .....
PCD read/write
Bit value = 1
external selection lsb
Ramp
No coasting
Ramp
use ramp
Start
Reset
Jog
Ramp 2
Data valid
Relay 01 active
selection lsb
selection msb
Reverse
10
PCD
243