Siemens SIMATIC CP 340, User Manual

Page: 122 / 200

Communication using function blocks
6.6 Delete receive buffer, FB12 "P_RESET"
PtP coupling and configuration of CP 340
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Manual, 04/2011, A5E00369892-03
Assignment in the data area
The P_RESET function block works together with an I_P_RESET instance DB. The DB
number is specified in the call. The data in the instance DB cannot be accessed.
Note
Exception: In the event of an error, STATUS == W#16#1E0F, you will find more detailed
information in the SFCERR or SFCSTATUS variables. See "Calling the SFCERR or
SFCSTATUS variable" for more information.
P_RESET FB parameters
The table below lists the parameters of the P_RESET FB.
Table 6- 7 P_RESET FB parameters
Name Type Data type Description Permitted values, remark
REQ INPUT BOOL Initiates job on positive edge
LADDR INPUT INT CP 340 base address The base address is taken from
STEP 7.
DONE
(1)
OUTPUT BOOL Job completed without errors STATUS parameter == 16#00;
ERROR
(1)
OUTPUT BOOL Job completed with errors Error information is written to the
STATUS parameter.
STATUS (1) OUTPUT WORD Specification of error If ERROR == 1, the STATUS
parameter will contain error
information.
(1)
The parameter is available until the next time the FB is called.