Direct Data Mapping - Leroy-Somer digitax st User Manual

12.6.1 Avoiding block mapping
In the above section block mapping was used to define mapping ranges. In order to
avoid this the target parameters should be entered in descending order. This means that
SM-PROFIBUS DP-V1 will not recognize a range of parameters and only two
parameters will be mapped.
Table 12.9 Non-block data mapping example
Mapping
parameter
Pr MM.10
Pr MM.11
Pr MM.12 to
Pr MM.19
Pr MM.20
Pr MM.21
Pr 17.22 to
Pr 17.29
Table 12.10 Non-block data structure example
Data word
IN word 0, 1
IN word 2, 3
IN word 4-9
12.7

Direct data mapping

Table 12.11
Pr MM.09
By default Pr MM.10 to Pr MM.29 are used as pointers to specify the source or
destination parameters of the mappings. When direct data mapping is enabled
Pr MM.10 to Pr MM.29 are used as the actual destination and source parameters for
output and input data respectively.
If direct data mapping mode is enabled all mapping parameters (Pr MM.10 to Pr MM.29)
will be reset to 0. When data compression is OFF the number of data words specified in
Pr MM.05 must be an even number. If an odd number is specified the appropriate
parameter will be set to specify the next lowest even number of data words (i.e. a value
of 7 in Pr MM.05 will only handle six data words or three data channels). This will not
however, change the value in Pr MM.05.
Non-cyclic data cannot be used when direct data mapping mode is enabled.
NOTE
Table 12.12 Direct data mapping configurations (data compression OFF)
Pr MM.05
2 to 10
100 to 109
200 to 206
300 to 309
78
Mapping
value
2004 Map to Pr 20.04.
2001 Map to Pr 20.01.
0 Not mapped
2035 Map to Pr 20.35
2031 Map to Pr 20.31
0 Not mapped
Target parameter
Menu Pr 20.04
Menu Pr 20.01
Not mapped
Direct data mapping enable
Default
Range
Access
Description
The first 10 IN channels will be written directly to Pr MM.10 to Pr MM.19, and the
first 10 OUT channels will be read directly from Pr MM.20 to Pr MM.29.
Non-cyclic data cannot be used in direct data mapping mode. The SM-
PROFIBUS DP-V1 operating status parameter (Pr MM.49) will indicate -3, and
mapping error code (Pr MM.50) will indicate 2.
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Description
Data word
OUT word 0, 1
OUT word 2, 3
OUT word 4-9
OFF (0)
OFF (0) or ON (1)
RW
SM-PROFIBUS-DP User Guide
Target parameter
Pr 20.35
Pr 20.31
Not mapped
Issue : a