Siemens CP 342-5 - Page 14

Application and functions
1.4 Performance data and behavior in operation
CP 342-5 / CP 342-5 FO
14 Manual, 07/2017, C79000-G8976-C146-10
Characteristic
Explanation / values
You will find GSD files on the Internet at the following address:
Link: (https://support.industry.siemens.com/cs/ww/en/view/113652)
Size of the DP data
areas
DP input area
240 bytes max.
DP output area 240 bytes max.
Min. slave interval
0.6 ms
SYNC / FREEZE
CP 342-5 (6GK7 342-5DA03-0XE0)
Is supported
CP 342-5 FO (6GK7 342-5DF00-0XE0)
The following is not supported
User parameter assignment data
3 bytes; value: 40 00 00 (fixed)
User diagnostics data
0 bytes
Note
Fail-safe
Fail
-safe mode is possible only if you use the GSD files listed in the table above.
Execution times of the program blocks for PROFIBUS DP
The following table will help you to calculate the CPU cycle times (OB1) in DP slave mode.
The table contains the execution time of the FCs (FC DP_SEND, FC DP_RECV) required for
DP processing on the S7-300 / C7-300 CPU.
Component
Explanation / values
Execution time on the CPU
314C-2DP (6ES7 314-6CF00-
0AB0)
Per DP_SEND block call:
• <3.0 ms at 8 bytes
• <5.0 ms at 240 bytes
Per DP_RECV block call:
• <3.3 ms at 8 bytes
• <5.8 ms at 240 bytes
Execution time on the CPU 317-
2PN/DP (6ES7 317-2EJ10-
0AB0)
Per DP_SEND block call:
• <1.5 ms at 8 bytes
• <2.3 ms at 240 bytes
Per DP_RECV block call:
• <1.7 ms at 8 bytes
• <2.8 ms at 240 bytes
Note
Time values are guidelines
The times shown for DP slave mode should only be considered as guideline values. The
values apply only when no other services (for example PG functions) are processed on the
CP.