4 examples of pcv mechanism, Examples of pcv mechanism, Parameter channel (pcv mechanism) – Lenze 931W User Manual
Page 46
Parameter channel (PCV mechanism)
Job and response processing
Examples of PCV mechanism
7
46
K-HB 13.0001-EN 2.1
7.3.4
Examples of PCV mechanism
Example 1: Request parameter change rights:
To request the parameter change rights a parameter value must be transmitted, so the job
identificationis 2. The PNU number is 927. This corresponds to 39F inthe hexadecimal data
format. The value 1 is transmitted as parameter value. The parameter value serves to
transmit the control authority to the PROFIBUS master. After this action, the operating
program cannot access the servo inverter anymore.
Parameter identification:
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Binary value
0
0
1
0
0
0
1
1
1
0
0
1
1
1
1
1
Hexadecimal value
2
3
9
F
Request parameter
value
PNU
Subindex
Bit
7
6
5
4
3
2
1
0
Binary
value
0
0
0
0
0
0
0
0
Parameter value
Byte
7
6
5
4
3
2
1
0
Value
0000
0000
0000
0000
0000
0000
0000
0001
As response identification the value 1 is output as job identification, see Tab. 20. This
means: Transmission of parameter values.
Response identification :
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Binary value
0
0
0
1
0
0
1
1
1
0
0
1
1
1
1
1
Hexadecimal value
1
3
9
F
Transmit parameter
value
PNU
In the subindex, the response contains a zero and in the parameter value of the response
the requested value, in this case 1, is returned.