Siemens SIMATIC S7-1200 - 2 STEP 7 makes the work easy

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Extended instructions
Basic instructions
Communication
Technology
S7-300
S7-400
S7-1200 S7-1500
Description LAD/FBD
STL
(not S7-1200)
SCL
✔
✔
✔
Swap data block register
CDB
nn
✔ ✔ ✔
Load the length of a global data block into
accumulator 1
L DBLG
nn
✔ ✔ ✔
Load the number of a global data block into
accumulator 1
L DBNO nn
✔ ✔ ✔
Load the length of an instance data block into
accumulator 1
L DILG
nn
✔ ✔ ✔
Load the number of an instance data block into
accumulator 1
L DINO nn
Code blocks
✔ ✔ ✔
Call block
LAD/FBD: Only for S7-300/400
CALL nn
✔
✔
✔
Conditional block call
CC
nn
✔
✔
✔
Unconditional block call
UC
nn
Runtime control
(✔)
✔ ✔
Limit and enable password legitimation
S7-400: SFC 109 PROTECT
ENDIS_PW
✔
✔
✔
✔
Restart cycle monitoring time
RE_TRIGR
✔
✔
✔
✔
Exit program
STP