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3
Parameterisation
3.1.2
Examples for access to data records through DPV1
The following examples refer to the system CPX-E shown in Fig. 3.1.
1 Bus module CPX-E-PB (with status bits)
2 Digital input module CPX-E-16DI
3 Digital output module CPX-E-8DO
4 Digital output module CPX-E-8DO
5 Analogue input module CPX-E-4AI-U-I
6 Analogue output module CPX-E-4AO-U-I
Fig. 3.1
Access to data records
For module no. 3 (digital output module CPX-E-8DO), module parameter "Behaviour after short circuit" shall be
changed.
First, the command box is assigned as follows è Tab. 3.5.
Command box assignment
Byte
1
Table of contents Slot number
1)
Example
103
1) As module-related data are relevant here: slot number = module number + 100
Tab. 3.5
After that, value 0 must be transferred with Write Box.
Access to diagnostic memory
Diagnostic memory entry 0 shall be read.
First, the command box is assigned as follows è Tab. 3.6.
Command box assignment
Byte
1
Table of contents Slot number
Example
1
Tab. 3.6
After that, the diagnostic memory entry 0 must be read with Read Box.
Festo – CPX-E-PB-EN – 2017-07 – English
Module no.:
2
3
Index number
Offset
21
1
2
3
Index number
Offset
21
0
0
1
2
3
4
1
2
3 4
5 6
4
–
–
4
–
–
5
19
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