Siemens SIMATIC S7-1200 Reference Manual page 14

Basic instructions
Start pulse timer
✔ ✔ ✔
Start extended pulse timer
✔ ✔ ✔
Enable timer
✔ ✔ ✔
Load timer value
✔ ✔ ✔
Load BCD-coded timer value
✔ ✔ ✔
Reset timer
✔ ✔ ✔
Start off-delay timer
✔ ✔ ✔
Start on-delay timer
✔ ✔ ✔
Start retentive on-delay timer
✔ ✔ ✔
Counters
IEC counters
✔ ✔ ✔ ✔
Count up
✔ ✔ ✔ ✔
Count down
✔ ✔ ✔ ✔
Count up and down
SIMATIC counters legacy
Assign parameters and count up
✔ ✔ ✔
Assign parameters and count down
✔ ✔ ✔
Assign parameters and count up/down
✔ ✔ ✔
Set initial counter value
✔ ✔ ✔
A5E33284667-AF
Extended instructions
Description
Technology
LAD/FBD
-(SP) -[SP]
-(SD) -[SD]
-(R) -[R]
-(SF) -[SF]
-(SD) -[SD]
-(SS) -[SS]
IEC counters are multi-instance capable.
CTU
CTD
CTUD
S_CU
S_CD
S_CUD
-(SC) -[SC]
Communication
STL
SCL
(not S7-1200)
SP nn
SD nn
FR nn
L nn
LC nn
R nn
SF nn
SD nn
SS nn
CTU
CTD
CTUD
nn S_CU
nn S_CD
nn S_CUD
nn nn
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