Detailed description
2.12 Block descriptions
Basic logic functions: PLC Basic program powerline (P3 pl)
114 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
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) If function activation is reset prior to receipt of acknowledgment, the output signals are not
updated without the operational sequence of the activated function being affected.
(6) Negative acknowledgment: Error has occurred, error code in output parameter state
Call example
Reading of three channel-specific 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 C1AxConfMachAxUsed1
C[1] M
(GND)
MD20070:
AXCONF_MACHAX_USED[2]
char 20070 1 C1AxConfMachAxUsed2
C[1] M
(GND)
MD20090:
SPIND_DEF_MASTER_SPIND
int 20090 1 C1SpindDefMasterSpind
S7 (ALIAS) names have been selected in order to:
• Incorporate the channel designation into the name
and
• Remove the characters [ ], which are not legal in a STEP 7 symbol.
Entry of the name in the S7 SYMBOL table (e.g., NCVAR for DB 120):
Symbol Operand Data type
NCVAR DB 120 DB 120
File DB120.AWL must be compiled and transferred to the PLC.
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