Siemens SIMATIC S7-1200 Reference Manual

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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
✔
✔
✔
✔
Scan Boolean result for positive signal edge
P_TRIG
FP
nn
✔
✔
✔
✔
Scan Boolean result for negative signal edge
N_TRIG
FN
nn
✔ ✔
Detect
positive signal edge
SCL: Programming with two instructions is
more effective:
posFlanke := signal and not
laststate;
laststate := signal;
R_TRIG
✔ ✔
Detect negative signal edge
SCL: Programming with two instructions is
more effective:
negFlanke := not
signal and not
laststate;
laststate := not signal;
F_TRIG
✔
✔
✔
✔
Normally open contact
-||-
nn
nn
nn
✔
✔
✔
✔
Normally closed contact
-|/|-
nn
nn
nn

Siemens SIMATIC S7-1200 Specifications

General

CPU Type	CPU 1211C, CPU 1212C, CPU 1214C, CPU 1215C, CPU 1217C
Communication	PROFINET
Analog Inputs	2
Analog Outputs	2
Power Supply	24V DC
Expansion Modules	Signal Modules (SM), Communication Modules (CM)
Programming Languages	LAD, FBD, SCL
Dimensions	90 mm x 100 mm x 75 mm
Program Memory	50 KB to 150 KB (depending on model)