Custom Data Formats - Leroy-Somer digitax st User Manual

With data compression turned off each direct mapping will use 32-bits (two channels of
NOTE
mappings) on the network. This will revert to 16-bit (one channel) when turned on. For
32-bit mappings a maximum of five IN and five OUT mappings may be used with data
compression turned on.
Parameters Pr MM.10 to Pr MM.29 are all 16-bit parameters, each data channel will be
reduced to 16-bits when data compression is enabled. Hence, a maximum of ten data
words can be specified in Pr MM.05 or Pr MM.39 and Pr MM.40.
Table 12.13 Direct data mapping configurations (data compression ON)
Pr MM.05
1 to 10
100 to 109
200 to 206
300 to 3098
12.8

Custom data formats

Table 12.14
Pr MM.39
Table 12.15
Pr MM.40
If the number of cyclic words is specified using the data format parameter (Pr MM.05)
the number of input and output cyclic words will be the same (See section 7.2 Data
formats ). Pr MM.39 and Pr MM.40 will always display the current number of input and
output cyclic data words being used.
When the data format (Pr MM.05) and the PPO Type (Pr MM.38) are both set to 0 the
number of input data words can be specified in Pr MM.39 and the number of output
words in Pr MM.40. This allows different numbers of input and output cyclic data words
to be specified.
CT Single Word or PPO 4 Word non-cyclic data can also be enabled by mapping input
and output words to the appropriate source/destination parameter.
Table 12.16 Customised non-cyclic channel mapping
Source/destination
parameter
Pr 61.50
Pr 61.51
SM-PROFIBUS-DP User Guide
Issue : a
Description
The first 10 OUT channels will be written directly to Pr MM.10 to Pr MM.19, and
the first 10 IN 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
the value -3, and mapping error code (Pr MM.50) will indicate the value 2.
IN cyclic words
Default
Range
Access
OUT cyclic words
Default
Range
Access
Non-cyclic mode Description
Mode 1 -CT
Single Word
Mode 2 - PPO 4
Word
www.leroy-somer.com
4
0 to 32
RW
4
0 to 32
RW
one IN and one OUT word must be assigned for use as
the CT Single Word non-cyclic channel.
four IN and four OUT words must be assigned for use as
the PPO 4 Word non-cyclic channel.
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