Detailed description
2.12 Block descriptions
Basic logic functions: PLC basic program solution line (P3 sl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
111
Configuration steps
Proceed as follows to read NC variables:
• Select variables with the NC VAR selector.
• Save selected variables in a *.VAR file
• Generate a STEP 7 *.STL source file.
• Generate a DB with the associated address data.
• Enter the symbol for the generated DB in the symbol table so that it is possible to access
the address parameters symbolically in the user program.
• Set FB2 parameters
Pulse diagram
1'5
5HT
(UURU
(1) Activation of function
(2) Positive acknowledgment: Receive new data
(3) Reset function activation after receipt of acknowledgment
(4) Signal change by means of FB
(5) Not permissible
(6) Negative acknowledgment: Error has occurred, error code in output parameter state
Call example
Reading of three channelspecific machine data from channel 1, whose address
specifications are stored in DB120.
Select data with NC VAR selector and store in file DB120.VAR; then create file DB120.AWL:
range Block Name Type No. Byte S7 Name
C[1] M
(GND)
MD20070:
AXCONF_MACHAX_USED[1]
char 20070 1 C1AxConfMachAx
Used1
C[1] M
(GND)
MD20070:
AXCONF_MACHAX_USED[2]
char 20070 1 C1AxConfMachAx
Used2
C[1] M
(GND)
MD20090:
SPIND_DEF_MASTER_SPIND
int 20090 1 C1SpindDefMaster
Spind
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