Siemens S7-1200 - Technology Instructions; High-Speed Counter

S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
409
Technology instructions
9
9.1
High-speed counter
Table 9- 1 CTRL_HSC instruction
LAD / FBD
SCL
Description
"CTRL_HSC_1_DB" (
hsc:=_hw_hsc_in_,
dir:=_bool_in_,
cv:=_bool_in_,
rv:=_bool_in_,
period:=_bool_in_,
new_dir:=_int_in_,
new_cv:=_int_in_,
new_rv:=_dint_in_,
new_period:=_int_in_,
busy:=_bool_out_,
status:=_word_out_);
Each CTRL_HSC (Control high-speed
counter) instruction uses a structure
stored in a DB to maintain counter data.
You assign the DB when the CTRL_HSC
instruction is placed in the editor.
1
STEP 7 automatically creates the DB when you insert the instruction.
2
In the SCL example, "CTRL_HSC_1_DB" is the name of the instance DB.
Table 9- 2 Data types for the parameters
Parameter and type
Data type
Description
HSC
IN
HW_HSC
HSC identifier
DIR
1, 2
IN
Bool
1 = Request new direction
CV
1
IN
Bool
1 = Request to set new counter value
RV
1
IN
Bool
1= Request to set new reference value
PERIOD
1
IN Bool 1 = Request to set new period value
(only for frequency measurement mode)
NEW_DIR
IN
Int
New direction: 1= forward, -1= backward
NEW_CV
IN
DInt
New counter value
NEW_RV
IN
DInt
New reference value
NEW_PERIOD IN Int New period value in seconds(only for frequency
measurement mode):
1= 1 s
2 = .1 s
3 = 0.1 s