Counting Functions; Function Fc 171 (Stru_Dos) - Siemens Simatic S5 IP 240 Manual

IP 240 Counter, Position Decoder and Positioning Module
C.2

Counting Functions

Function FC 171 (STRU_DOS)

Introductory The call, meaning and parameter values for the FC 171 function are de-
Remarks scribed below.
Calling the
Function
Ladder Diagram LAD
FC 171
EN
BGAD
KANR
DBNR
DIG
PRA
EXTE
Parameters The table below provides an overview of the parameters required by the
FC 171 function.
Name Parameter Data Type
Type
BGAD INPUT INT
KANR INPUT INT
DBNR INPUT INT
DIG INPUT WORD
PRA INPUT WORD
EXTE INPUT WORD
PAFE OUTPUT BYTE
Parameter Values
For all other parameter values, please refer to the Manual (Section 8.3.1,
"Configuring Function Block").
C-4
ENO
PAFE
Module address
Channel number
Data block number
Assign digital output
Assign interrupts
Control counter enable
Error flag byte
DBNR: INT = x
x: Dependent on the CPU used (number 0 is not permitted)
EXTE: WORD
corresponds to the EXT parameter in S5 (had to be renamed because EXT
is a compiler code word).
Statement List STL
CALL FC 171 (
BGAD := ,
KANR := ,
DBNR := ,
DIG := ,
PRA := ,
EXTE := ,
PAFE := );
Description
EWA 4NEB 811 6120-02b
IP 240