Siemens SIMATIC S7-300 FM 350-1 - User Program Data Exchange

Programming the FM 350-1
5.1 Data exchange between the user program and FM 350-1
FM 350-1 Counter module
40 Manual, 05/2011, A5E03648639-01
5.1 Data exchange between the user program and FM 350-1
Data Exchange
You can access the FM 350-1 control and feedback interface from the user program either
using standard FCs or with load and transfer commands. Mixed operation is not permitted.
Table 5- 2 Possibilities of accessing the control and feedback interface
Standard FC Load and transfer commands
Control interface Write with
 FC CNT_CTL1
 FC CNT_CTL2
Transfer command, e.g. T PAD
Feedback interface Read with
 FC CNT_CTL1
 FC CNT_CTL2
Load command, e.g. L PED
The figure illustrates the data exchange on the basis of standard FCs:
'DWD
'%[
)&
)&
3URJUDP
&RPPDQGV
)0
&RQWUROLQWHUIDFH
)HHGEDFNLQWHUIDFH
8VHUSURJUDPLQWKH&38
Figure 5-1 Exchange of Data between the User Program and FM 350-1 with FC`s (Example)