Siemens SINUMERIK 828D Function Manual page 937

Pulse diagram
(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 the 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:
Area Block Name
C[1] M MD20070 $MC_AXCONF_MACHAX_USED[1]
C[1] M MD20070 $MC_AXCONF_MACHAX_USED[2]
C[1] M MD20090 $MC_SPIND_DEF_MASTER_SPIND
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 DB120):
Symbol
NCVAR
File DB120.AWL must be compiled and transferred to the PLC.
Parameterization of FB 2 with instance DB 110:
DATA_BLOCK DB 110
FB 2
BEGIN
END_DATA_BLOCK
Function FC "VariablenCall" : VOID
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Operand
DB 120
//Unassigned user DB, as instance for FB 2
P3: Basic PLC Program for SINUMERIK 840D sl
Typ
No. Byte S7 Name
e
char 20070 1
char 20070 1
int 20090 1
Data type
DB 120
13.13 Block descriptions
C1AxConfMachAx Used1
C1AxConfMachAx Used2
C1SpindDefMaster Spind
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