9.2 Example: Control Word Telegram using Standard Telegram 1/PPO3
This example shows how the control word telegram relates to the controller and the frequency converter, using FC Control
Profile.
The control word telegram is sent from the PLC to the frequency converter. Standard Telegram 1 is used in the example in
order to demonstrate the full range of modules. All the values shown are arbitrary, and are provided for the purposes of
demonstration only.
0 1 2 3
CTW MRV PCD PCD
04 7C 20 00
PQW: 256 258 260 262
CTW MRV
Bit no.: 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 0 0 1 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 4 7 C 2 0 0 0
Table 9.3 PCD
Table 9.3 indicates the bits contained within the control word, and how they are presented as process data in Standard
Telegram 1 for this example.
Table 9.4 indicates which bit functions, and which corresponding bit values are active for this example.
Bit Bit value=0 Bit value=1 Bit value
00 Reference value External selection lsb 0
C
01 Reference value External selection msb 0
02 DC brake Ramp 1
03 Coasting Enable 1
04 Quick stop Ramp 1
7
05 Freeze output Ramp enable 1
06 Ramp stop Start 1
07 No function Reset 0
08 No function Jog 0
4
09 Ramp 1 Ramp 2 0
10 Data not valid Valid 1
11 No function Relay 01 active 0
12 No function Relay 02 active 0
0
13 Parameter set-up Selection lsb 0
14 Parameter set-up Selection msb 0
15 No function Reversing 0
Function active
Function inactive
Table 9.4 Control Word Telegram using Standard Telegram 1/PPO3
Application Examples
Operating Instructions
60 Danfoss A/S © Rev. 2014-02-27 All rights reserved. MG90U302
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