Specifications

SIMATIC Instructions
9-34
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Table 9-6 HSC1 Modes of Operation
HSC1
Mode Description I0.6 I0.7 I1.0 I1.1
0 Single phase up/down counter with internal direction control
Clock
1
SM47.3 = 0, count down
SM47.3
=
1, count u
p
Clock
Reset
2
SM47
.
3
=
1
,
count
u
Start
3 Single phase up/down counter with external direction control
Cl k
Di
4
I0.7 = 0, count down
I0 7 = 1 count u
p
Clock Dir.
Reset
5
I0
.
7
=
1
, coun
t
up
Start
6 Two-phase counter with count up and count down clock
it
Cl k
Cl k
7
inputs Clock
(
Up
)
Clock
(
Dn
)
Reset
8
(U )
(Dn)
Start
9 A/B phase quadrature counter,
Clock
Clock
10
phase A leads B by 90 degrees for clockwise rotation,
p
hase B leads A by 90 degrees for counterclockwise
Clock
Phase
Clock
Phase
Reset
11
hase
B
leads
A
by
90
degrees
for
counterclockwise
rotation
Phase
A
Phase
B
Start
Table 9-7 HSC2 Modes of Operation
HSC2
Mode Description I1.2 I1.3 I1.4 I1.5
0 Single phase up/down counter with internal direction control
Cl k
1
SM57.3 = 0, count down
SM57 3 = 1 count u
p
Clock
Reset
2
SM57
.
3
=
1
, coun
t
up
Start
3 Single phase up/down counter with external direction control
Cl k
Di
4
I1.3 = 0, count down
I1 3 = 1 count u
p
Clock Dir.
Reset
5
I1
.
3
=
1
, coun
t
up
Start
6 Two phase counter with count up and count down clock inputs
Cl k
Cl k
7
Clock
(
Up
)
Clock
(
Dn
)
Reset
8
(U )
(Dn)
Start
9 A/B phase quadrature counter, Clock
Phase
Clock
Phase
10
phase A leads B by 90 degrees for clockwise rotation,
p
hase B leads A by 90 degrees for counterclockwise
Phase
A
Phase
B
Reset
11
hase
B
leads
A
by
90
degrees
for
counterclockwise
rotation
A
B
Start