Siemens SIMATIC S7-1200 User manual

12/2017
Reference manual
support.industry.siemens.com
SIMATIC
S7-1200/S7-1500
Comparison list for programming languages
based on international mnemonics
Edition

A5E33284667-AF Page 1
Comparison list for S7-300, S7-400, S7-1200, S7-1500
Reference Manual
Legal information
Warning notice system
This manual includes notices you have to observe to ensure your personal safety and to prevent damage to property. The notices referring to your
personal safety are highlighted in the manual by a hazard alert symbol; notices referring only to property damage have no hazard alert symbol.
Depending on the degree of danger, warnings are displayed in a descending order as follows.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury may result if proper precautions are not taken.
NOTICE
indicates that damage to property may result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury
to persons with a hazard alert symbol may also include a warning relating to property damage.

A5E33284667-AA Page 2
Qualified personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific task in accordance with the
relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and
experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems.
Proper use of SIMATIC products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and the associated technical documentation. If third-party
products and components are used, these have to be recommended or approved by Siemens. Proper transport, storage, installation, assembly,
commissioning, operation, and maintenance are required to ensure that the products operate safely and without any problems. The permitted
ambient conditions must be adhered to. Notes in the respective documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of the
Siemens AG
. Any other names appearing in this document may be trademarks, the use
of which by third parties for their own purposes may breach owners' rights.
Disclaimer of liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described. However, si
nce deviations
cannot be precluded entirely, we cannot guarantee full consistency. The information in this publicatio
n is reviewed regularly and any necessary
corrections are included in subsequent editions.
Siemens AG
Digital Factory
P.O. Box 48 48
90026 NUREMBERG
Comparison list for S7-300, S7-400, S7-1200, S7-1500
12/2017

A5E33284667-AF Page 3
Contents of the comparison list
•Measuring program runtimes – see below.
•Load objects to the CPU: Which modifications and which modified blocks you load to the CPU in which operating
mode – next page.
•Overview, requirements, general conditions and legend for the comparison list (Page 7)
•Comparison list for S7-300, S7-400 (not H-Systems), S7-1200, S7-1500 including CPU 150xS Software
Controllers:
Which instructions and functions you can use for which controller family – as of Page 8.
•Instructions for SIMATIC Ident and SIMATIC Energy Suite – appendix.
Measuring program runtimes
The runtime of parts of the user program depends on many factors. A listing of runtimes of individual instructions in a table is
thus not possible.
The RUNTIME (runtime measuring) instruction is used to measure the runtime of the entire program, individual blocks or
command sequences. The runtime measurement begins with the first call of the RUNTIME instruction and ends with the
second call.
Use an OB priority >15 for runtime measurement. This ensures that "online monitoring" does not falsify the runtime. You can
find more detailed information in the SIMATIC STEP 7 online help. Enter "RUNTIME" in the search and select "S7-1200", "S7-
1500" or "S7-1500T" as validity identifier.
Programming examples in SCL:
"Common_Data".opt.Last_Cycle := RUNTIME(#Tag_Memory); //Start of the runtime measurement,
LReal
"speed test FB opt_DB"(ON_2:="i1",…);//Runtime measurement through RUNTIME
"Common_Data".opt.Last_Cycle := RUNTIME(#Tag_Memory); //End of the runtime measurement
The Last_Cycle tag contains the time that has passed from the preceding call to the current call of RUNTIME.

A5E33284667-AA Page 4
Load objects to the CPU
The table shows which modifications and which modified blocks you can download in which operating mode.
Very complex programs can prevent downloading in RUN mode. Solution approaches:
•Use a memory card with sufficient capacity.
•Select a CPU with sufficient work memory.
•Reduce the number of modified used blocks, constants, PLC tags or data types.
You can find information about the behavior of the F-CPU for fail-safe blocks in the SIMATIC Safety – Configuring and
Programming manual.
Modifications and blocks S7-300 S7-400 S7-1200
V4.0 or
higher
S7-1500 S7-1200
V1.0 - 2.1
S7-1200
V2.2 - V3.0
Modified properties of hardware
components
STOP
STOP,
constraints in
RUN
STOP STOP STOP STOP
Added hardware components
STOP
STOP,
constraints in
RUN
STOP STOP STOP STOP
New/revised text lists
(alarms)
RUN RUN - RUN - -
Load number of blocks
RUN (<17) RUN (<57) RUN (<21) RUN STOP RUN (<11)
Reset work memory (MRES)
STOP
(Reset)
STOP
(Reset)
STOP
(Reset)
STOP
(Reset)
STOP
(Reset)
STOP
(Reset)
New OB
RUN RUN STOP RUN STOP STOP
Modified OB: Code modifications,
modification of comments
RUN RUN RUN RUN STOP RUN

A5E33284667-AF Page 5
Modifications and blocks S7-300 S7-400 S7-1200
V4.0 or
higher
S7-1500 S7-1200
V1.0 - 2.1
S7-1200
V2.2 - V3.0
OB with modified properties
(e.g. cycle time change)
STOP RUN STOP RUN STOP STOP
Deleted OB
RUN RUN STOP RUN STOP STOP
New FB/FC/DB/PLC data type (UDT)
RUN RUN RUN RUN STOP RUN
Deleted FB/FC/DB/PLC data type
(UDT)
RUN RUN RUN RUN STOP RUN
Revised FB/FC: Code modification,
modification of comments
RUN RUN RUN RUN STOP RUN
Revised FB/FC: Interface change
STOP STOP RUN (Init) RUN (Init) STOP STOP
Modified DB (no memory reserve
configured): Name/type of tags
modified, tags added or deleted
RUN (Init) RUN (Init) RUN (Init) RUN (Init) STOP STOP
Modified DB (memory reserve
configured): New tags added
-- -- RUN RUN -- --
Modified PLC data type
(UDT)
STOP STOP RUN (Init) RUN (Init) STOP STOP
Modified PLC tags (added, deleted,
name or data type changed)
RUN RUN RUN RUN STOP STOP
Modified retentivity settings (bit
memory address area, DB area)
STOP
All objects
retentive
STOP STOP STOP STOP

A5E33284667-AA Page 6
Modifications and blocks S7-300 S7-400 S7-1200
V4.0 or
higher
S7-1500 S7-1200
V1.0 - 2.1
S7-1200
V2.2 - V3.0
Motion Control technology objects:
Changes to MC Servo cycle clock,
change from free
-running to cyclical
(and vice versa). Changes to the
hardware interface of the TO
-- -- -- STOP -- --
(init) means that the CPU overwrites the actual values of the DBs with start values during downloading.
Comparison list
Validity and general conditions
•SIMATIC STEP 7 version 15 or higher
•The contents of the S7-1500 column also apply to SIMATIC S7-1500 Software Controller CPU 150xS
•SIMATIC S7-1200 firmware 4.2 or higher. SIMATIC S7-1200 only supports LAD, FBD and SCL.
•SIMATIC S7-1500 firmware 2.5 or higher
•STL: Some instructions have to be called via CALL.
•The special features of the S7-400 H-Systems are not taken into consideration.
•Some system state lists (SSLs) for SIMATIC S7-300/400 contain similar information such as function calls with the
SIMATIC S7-1200/1500.

A5E33284667-AF Page 7
Structure of the comparison list
•Basic instructions
Instructions that you use often, such as bit logic operations, timers, counters, mathematical functions
•Extended instructions
Extended instructions for more possibilities such as date and time, interrupts, alarms, PROFIenergy
•Technological instructions (technology)
Technological functions, such as PID control, motion control
•Instructions for communication (communication)
Instructions for communication, such as S7 communication, Open User Communication
Legends
✔
Applicable
(
✔
)
Applicable with restrictions
nn
Not required, you can, for example, program with simple commands in SCL.
Grayed
out
We recommend that you do not use the grayed out instructions in S7-1200 or S7-1500, because these
instructions are not suitable for symbolic addressing or multiple instances. SIMATIC counters and timers are not
recommended because they do not have multiple instance capability.
Xyz
New instruction as of SIMATIC STEP 7 V14.
For this purpose, SIMATIC S7-1200 requires at least firmware 4.2 and SIMATIC S7-1500 at least firmware 2.0.
Xyz
New instruction as of SIMATIC STEP 7 V15.
For this purpose, SIMATIC S7-1200 requires at least firmware 4.2 and SIMATIC S7-1500 at least firmware 2.5.
Xyz
Also available as fail-safe instruction in the Safety optional package in LAD and FBD.

A5E33284877-AA Page 8
Extended instructions
Basic instructions
Communication
Technology
Instructions in the section "Basic instructions"
Instruction groups
Page
Instruction groups
Page
Instruction groups
Page
General
Bit logic operations
Safety functions
8
9
11
Comparator operations
Mathematical functions
Move
14
16
18
Word logic operations
Shift and rotate
Load and transfer
29
30
31
Times
Counter operationss
12
13
Conversion operations
Program control operations
22
25
Legacy 32
S7-300
S7-400
S7-1200 S7-1500
Description LAD/FBD STL
(not S7-1200) SCL
General
✔
✔
✔
✔
Insert network
✔
✔
nn
✔
✔
✔
✔
Insert empty box
✔
nn
nn
✔
✔
✔
✔
Open branch
✔
(
✔
✔
✔
✔
Close branch
✔
)
✔
✔
✔
✔
Insert input
-|
nn
nn
✔
✔
✔
✔
Invert Boolean result
-|NOT|-
-o|
NOT

A5E33284667-AF Page 9
Extended instructions
Basic instructions
Communication
Technology
S7-300
S7-400
S7-1200 S7-1500
Description LAD/FBD STL
(not S7-1200) SCL
Bit logic operations
✔
✔
✔
✔
AND logic operation
✔
&
O
&
✔
✔
✔
✔
OR logic operation
✔
>=1
O
OR
✔
✔
✔
✔
EXCLUSIVE OR logic operation
✔
X
X
XOR
✔
✔
✔
✔
Assignment
-( )-
-[=]
=
:=
✔
✔
Negate assignment
-(/)-
-[/=]
NOT
✔
✔
✔
✔
Reset output
-(R)
-[R]
R
nn
✔
✔
✔
✔
Set output
-(S)
-[S]
S
nn
(✔)
✔✔
Set bit field
S7-400: SFC 79 SET
SET_BF
nn
nn
(✔)
✔✔
Reset bit field
S7-400: SFC 89 RSET
RESET_BF nn nn
✔
✔
✔
✔
Set/reset flip-flop
SR
nn
nn
✔
✔
✔
✔
Reset/set flip-flop
RS
nn
nn
✔✔✔✔
Scan operand for positive signal edge
-|P|-
<Operand>;
FP;
nn
✔✔✔✔
Scan operand for negative signal edge
-|N|-
<Operand>;
FN;
nn
✔
✔
Set operand on positive signal edge
-(P)-
R_TRIG
✔
✔
Set operand on negative signal edge
-(N)-
F_TRIG