26
SI-INTERBUS User Guide
Issue Number: 1
Table 6-6 Data structure example
To avoid block mapping when parameters of a particular menu are specified, the
parameter values should be entered in descending order, i.e. largest value parameter
first.
6.4.11 Disabling cyclic data channels
If any cyclic data channels are not being used, the associated mapping parameters
should be set to 0. The Interbus master controller will transmit a value of 0 for the
unused cyclic data words, and any unused incoming data values will be set to 0 before
being passed to the Interbus master controller.
6.4.12 Cyclic data mapping examples
The following sections show some example data formats that can be selected, and the
parameter mapping that will apply (by default) to each format.
6.4.12.1 Two cyclic channels only (default)
This data format provides two cyclic data channels with no non-cyclic data. The total
data length is 4 words in and 4 words out. This data format is selected by default.
Configuration parameters:
Pr
MM.005
(
Interbus Data Format
) = 4.
Pr
MM.034
(
Cyclic Data Compression Enable
) = Off.
Table 6-7 Default cyclic data mapping
Target Parameter
Data Word
Pr
20.021
IN Word 0, 1
Pr
20.022
IN Word 2, 3
Pr
20.023
IN Word 4, 5
Pr
20.024
IN Word 6, 7
Pr
20.025
IN Word 8, 9
Pr
18.011
OUT Word 0
Pr
18.012
OUT Word 1
Pr
18.013
OUT Word 2
Pr
18.014
OUT Word 3
Pr
18.015
OUT Word 4
Pr
19.021
OUT Word 5
Pr
19.022
OUT Word 6
Pr
19.023
OUT Word 7
Pr
19.024
OUT Word 8
Pr
19.025
OUT Word 9
Cyclic Channel
Data Word
Parameter
Default Mapping
IN Channel 0
Word 0, 1
Pr
MM.010
Pr
10.40
,
Status Word
IN Channel 1
Word 2, 3
Pr
MM.011
Pr
2.01
,
Post Ramp Reference
OUT Channel 0
Word 0, 1
Pr
MM.020
Pr
6.42
,
Control Word
OUT Channel 1
Word 2, 3
Pr
MM.021
Pr
1.21
,
Preset Reference 1
