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Data transfer

Examples for the configuration of PI/PO data

Feldbus-Baugruppe 2113 INTERBUS

7.6

7.6.4

7.6-27

EDSIBS-1.0-06/2003

The POdata word 2 is to be assigned to the percentage setpoint (index = 6052

hex

Procedure:

1. Data type derived from the code table ^ 7.6- 43.

à The data type of the parameter ”Percentage setpoint“ is I16, i.e. it is a word parameter (16 bit). The code table

for t he parameter ”Process output data descript io n structure“ (index = 6001

hex

) shows that the PO data word 2 is

to be entered under subindex 6 and 7 (word parameters).

The subindex o f the parameter ”PO data description“ (index = 6001

hex

) can be described with the PCP service

”Write“.

)

))

) Note!

The description of PO data results in inconsistent data, as the

data are exchanged between controller and INTERBUS master in

very short cycle times.

Therefore, the PO data are automatically inhibited when changing

the PO data configuration. After the adaptation of the PO data to

the new configuration, the data can be enabled via the parameter

”PO data enable” (index 6002

hex

2. Enter the index of the parameter ”Percentage setpoint“: Write

(index = 6001

hex

, subindex = 6

hex

, value = 6054

hex

)

3. Enter the subindex of the parameter ”Percentage setpoint“: Write

(index = 6001

hex

, subindex = 7

hex

,value=0

hex

)

))

) Note!

The index must be changed to zero to change a subindex.

You can then change the subindex before the index.

4. Enter the index of the parameter ”PO data enable“ (6002

hex

) to enable process data : Write

(index = 6002

hex

, subindex = 0

hex

, value = FFFFFF

hex

)

Now the PO data can be read again from the controller .

)

))

) Note!

If a parameter is configured for PO data (e.g. the parameter

”Control word“ (6040hex) in Lenze setting), it is not possible to

write this parameter directly via its index (example: index =

6040hex)

PO data configuration

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