Parameter channel (pcv mechanism), Subindex, Parameter value, e.g. for 100 1/min – Lenze 931W User Manual
Page 48
Parameter channel (PCV mechanism)
Job and response processing
Examples of PCV mechanism
7
48
K-HB 13.0001-EN 2.1
Example 3: Change of the set speed
To change the speed in a driving record, a similar procedure like requesting parameter
values is selected. As job identification, a 7 must be entered here (job identification 7 –
change parameter value).
To continue to let the drive run with a changed speed, the edge at bit 6 of the control word
must be changed for acknowledgement after changing the setpoint. The new setpoint is
accepted after every edge change (0 after 1 and 1 after 0).
Parameter identification:
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Binary value
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
Hexadecimal value
7
0
0
1
Change parameter
value
PNU
Subindex
Bit
7
6
5
4
3
2
1
0
Binary
value
0
0
0
0
0
0
0
1
The subindex indicates the parameter to be addressed.
Parameter value
Byte
7
6
5
4
3
2
1
0
Value
0000
0000
0000
0000
0000
0000
0110
0100
In this example, the parameter value is the speed. Here, a value of 100 1/min is selected.
As response identification a 4 is output as job identification, and the PNU, in this case 001
is output for driving record 1, see Tab. 20. This means: Transmit parameter value (array
word).
Response identification :
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Binary value
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Hexadecimal value
4
0
0
1
Transmit describing
element
PNU
Subindex
Bit
7
6
5
4
3
2
1
0
Binary
value
0
0
0
0
0
0
0
1
Parameter value, e.g. for 100 1/min
Byte
7
6
5
4
3
2
1
0
Value
0000
0000
0000
0000
0000
0000
0110
0100