Siemens CP 342-5, Руководство пользователя

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Compatibility with the previous product
7.3 Compatibility in the user program in DP mode
CP 342-5 / CP 342-5 FO
Manual, 10/2011, C79000-G8976-C146-09
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Note on 8: Consistency in the data acceptance between CP and user program
Depending on the behavior in the user program, you can consider different areas as
consistent data areas on the transfer interface between CP and user program.
●
Variant 1: NDR bit is evaluated on the program block interface
You can assume consistency over the entire DP data area used.
● Variant 2: NDR bit is not evaluated on the program block interface
You can assume data consistency in a contiguous, non-overlapping 32-byte area.
("Non-overlapping" means: 32-byte areas must be counted or taken into account from the
start address "0" of the DP data area under consideration.)
Table 7- 2 Consistency range in DP master mode
Access method in the user program maximum area size with data consistency
Variant 1 2160 bytes
Variant 2 32 bytes
Table 7- 3 Consistency range in DP slave mode
Access method in the user program maximum area size with data consistency
Variant 1 240 bytes
Variant 2 32 bytes
Note on 9: Program blocks for the DP mode
Program blocks with the current version of STEP 7 ship with the CP 342-5 / CP 342-5 FO
described here. In the following table, you can see how you can use these block versions
and the previous block versions for the available modules:
Program block type
(version) can be used with module type CP 342-5 with order no. 6GK7 342-
-5DA00-0XE0 -5DA01-0XE0 -5DA02-0XE0
configured as ..DA00
or ..DA01 -5DF00-0XE0
-5DA02-0XE0
-5DA03-0XE0
< V3.0 ● ● ●
>= V3.0 ● ● ● ●