Siemens CPU 414-4 H Produkthandbuch Seite 12

CPU 414-4H / CPU 417-4H
Calling the SFC51 "RDSYSST" with SZL_ID=W#16#0232 and
INDEX=W#16#0004
In contrast to the information in the Systemsoftware for S7-300 and S7-400, System and
Standard Functions reference manual, an H system outputs two data records, not only in
RUN-REDUNDANT operating mode, but also in solo mode and in separate operation.
However, only the data record which has a value 0 in the byte 0 of the word "index" is valid.
Calling the SFC51 "RDSYSST" Using SZL_ID=W#16#xy91
For the CPUs 414-4H and 417-4H the data records for the following SSL partial lists cannot be
read using SFC51 "RDSYSST":
SZL_ID=W#16#0091, W#16#0191, W#16#0291, W#16#0391, W#16#0991, W#16#0E91
Nesting the OB82 in STARTUP Mode
If you are operating your DP master systems in DPV1 mode, OB82 can be nested when your
CPU is in STARTUP mode.
For more details refer to the Migration Guide for DPV1 which you can find in the Internet at
http://www.ad.siemens.de/simatic-cs under the article number 7027576.
Also, apart from the currently specified IDs, further call IDs are possible in the STATUS
parameter.
Using the SFC17 "ALARM_SQ" and the SFC18 "ALARM_S"
The SFCs 107 "ALARM_DQ" and 108 "ALARM_D" will replace SFCs 17 "ALARM_SQ" and 18
"ALARM_S". The new SFCs have the advantage that you can manage the system resources
assigned when creating a message (for more details refer to the online help or the electronic
manual). Therefore, only use the SFCs 107 and 108 when creating new programs.
Using the SFC100 "SET_CLKS"
Note
The SFC 100 "SET_CLKS" will replace the SFC 0 "SET_CLK". Therefore, only use the
SFC 100 when creating new programs.
Using the SFBs 52 to 54 with an External DP Interface Module
If you are using the SFBs 52 "RDREC", 53 "WRREC" or 54 "RALRM" with the intention of
accessing DP slaves via an external DP interface module, observe the following: Only when
you are using a CP443-5 ext. with the order number 6GK7 443-5DX03-0XE0 as of firmware
version V4.0.0 as an external DP interface module, the specified SFBs have the functionality
described in the online help and in the electronic manual.
A5E00073168-07
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