Siemens SIMATIC S7-200 User manual

SIMATIC S7-200 to SIMATIC S7-1200
software conversion tool
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Prerequisites, installation,
and overview 1
Program conversion process
2
Program structure
conversion
3
S7-200 LAD instruction
conversion
4
SIMATIC
S7-1200
SIMATIC S7-200 to SIMATIC S7-
1200 software conversion tool
Manual
1/2010

Legal information
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Note the following:
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Ⓟ 01/2010
Copyright © Siemens AG 2010.
Technical data subject to change

SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
Manual, 1/2010 3
Table of contents
1 Prerequisites, installation, and overview.................................................................................................... 5
2 Program conversion process ..................................................................................................................... 7
2.1 Run the converter tool....................................................................................................................7
2.2 Configure the S7-1200 CPU and I/O modules...............................................................................8
2.3 Compare the program blocks in the original program and the converted program.....................10
2.4 Compare the symbols/tags in the original program and the converted program.........................11
2.5 Complete the STEP 7 Basic program and verify the run-time operation.....................................13
3 Program structure conversion.................................................................................................................. 15
3.1 Program structure conversion overview ......................................................................................15
3.2 Memory addresses ......................................................................................................................16
3.3 Symbol table ................................................................................................................................18
3.4 Data block ....................................................................................................................................18
3.5 Interrupt events ............................................................................................................................19
3.6 Wizards ........................................................................................................................................21
3.7 Libraries .......................................................................................................................................22
4 S7-200 LAD instruction conversion.......................................................................................................... 23
4.1 Bit logic.........................................................................................................................................23
4.2 Timers ..........................................................................................................................................24
4.3 Counters.......................................................................................................................................24
4.4 Compare ......................................................................................................................................25
4.5 Integer math.................................................................................................................................25
4.6 Floating-point math ......................................................................................................................26
4.7 Move ............................................................................................................................................26
4.8 Convert.........................................................................................................................................26
4.9 Program control............................................................................................................................27
4.10 Logical operations........................................................................................................................28
4.11 Shift and Rotate ...........................................................................................................................28
4.12 Clock and Calendar .....................................................................................................................28
4.13 String............................................................................................................................................29
4.14 Communication ............................................................................................................................29
4.15 Interrupts......................................................................................................................................30
4.16 Table ............................................................................................................................................30

Table of contents
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
4 Manual, 1/2010

SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
Manual, 1/2010 5
Prerequisites, installation, and overview 1
Prerequisites
The following software must be installed on your computer or programming device:
● SIMATIC STEP 7-Micro/WIN V4.0 SP6 (or later)
● SIMATIC STEP 7 Basic V10.5 SP2
● SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
The STEP 7-Micro/WIN program that you want to convert must have these properties:
● The program must have been created using STEP 7-Micro/WIN V4.0 SP7 or an earlier
version of STEP 7-Micro/WIN.
● The program must have been created using SIMATIC programming mode. IEC
programming mode is not supported.
● The program must have been saved in LAD (ladder editor) format.
● The program must compile with no errors.
● All user-defined password block protection must have been removed from the
STEP 7-Micro/WIN program. Remove the password protection from the main routine,
subroutines, interrupt routines, and all data pages in the data block. Any program block
that is password protected will not be converted.
Note
If a STEP 7-Micro/Win wizard has generated and protected program blocks, then the
block protection cannot be removed and these program blocks are not converted.
Install the converter software
● STEP 7 Basic V10.5 SP2 and STEP 7-Micro/WIN V4.0 SP7 (or later) must already be
installed or your computer or programming device.
● Double-click the setup.exe file that installs the SIMATIC S7-200 to SIMATIC S7-1200
software conversion tool. You can run the setup.exe file from any directory.

Prerequisites, installation, and overview
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
6 Manual, 1/2010
Table 1- 1 S7-200 program to S7-1200 program converter overview
Task Tool
1 Create a user program with an unspecific CPU (Page 7) Converter
2 Configure the unspecific CPU (Page 8) STEP 7 Basic device configuration
3 Compare the original user program (for the S7-200)
with the converted program (for the S7-1200)
•Program blocks (Page 10)
•Symbols/tags (Page 11)
STEP 7-Micro/WIN and
STEP 7 Basic
4 Complete the converted S7-1200 program and verify correct
run-time operation (Page 13)
STEP 7 Basic

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Manual, 1/2010 7
Program conversion process 2
2.1 Run the converter tool
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool operation
1. Start STEP 7 Basic.
2. Select the Project view.
3. From the "Project" menu, select "Convert S7 200 Project".
4. Click the "Browse" button on the "S7-200 Classic Project Converter" dialog and set the
path to the STEP 7-Micro/WIN *.mwp project file.
5. Start the conversion process by clicking the "Convert" button.
6. Complete the conversion process by editing the "Create a new project" dialog text and
clicking the "Create" button.
7. Update the blocks and links between blocks with the STEP 7 Basic program compiler.
Use the mouse and right-click over the new "Unspecific CPU 1200" device in the Project
tree. Select the "Compile > Software (rebuild all blocks)" item from the right-click menu.

Program conversion process
2.2 Configure the S7-1200 CPU and I/O modules
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WARNING
Due to functional differences between the S7-200 and S7-1200, your user program may not
have been completely converted
An incomplete or improper conversion of your user program may cause unexpected
machine or process operation which could cause death, serious injury, or property damage.
You must review and check the converted program to ensure proper and safe operation in
your application.
2.2 Configure the S7-1200 CPU and I/O modules
Note
The converter tool does not configure the S7-1200 CPU and I/O modules.
1. Use the STEP 7 Basic Device configuration to either detect the configuration of the
connected S7-1200 system or specify the system components from the Hardware
catalog. All S7-200 programs are initially converted to the unspecified S7-1200 CPU type.
2. S7-200 system Block CPU parameters and CPU status and control functions that are
programmed by SM memory addresses are not converted. You must set up the
corresponding S7-1200 CPU properties using STEP 7 Basic Device configuration
settings. CPU options that your S7-1200 program will use must be properly configured,
before your program can access or operate those CPU options. Some of the S7-1200
CPU configuration options are listed in the following table.

Program conversion process
2.2 Configure the S7-1200 CPU and I/O modules
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
Manual, 1/2010 9
Table 2- 1 S7-1200 Device configuration options compared to S7-200
S7-1200 Device configuration S7-1200 parameter S7-200 parameter
Location of system memory byte
(MBx)
Fixed SM (Special memory) address
Always 1 bit SM0.0 Always_On
System memory
byte
First cycle bit SM0.1 First_Scan_On
Enable System and
clock memory
Clock memory
bits
Location of clock memory byte (MBx) SM0.5 Clock-1s
Configurable address Fixed address
Input filters Digital input filters
Enable rising edge interrupt Fixed assignment
Enable falling edge interrupt Fixed assignment
Digital inputs
Pulse catch Pulse catch bits
Configurable address Fixed address
Configure Digital I/O
Digital outputs
RUN-to-STOP output state Digital output table
Configurable address Fixed address
Noise reduction No support
Measurement type Hardware setup
Voltage range Hardware setup
Analog inputs
Smoothing Analog input filters
Configurable address Fixed address
Output type Hardware setup
Configure Analog I/O
Analog outputs
RUN-to-STOP output state Analog output table
Configurable address Fixed address
Type of counting Counting type only
Operating phase HDEF instruction
Mode parameter
Input source Fixed assignment
Count direction control Mode selection and SM
address
Initial count direction SM address
Initial values SM address
Reset options Mode selection and SM
address
Enable High-speed
counters
HSC 1, 2, 3, 4,
5, 6
Interrupt OB event
configuration
ATCH instruction event
parameter
Configurable address Fixed address
Generator type SM address
Output source Fixed
Time base SM address
Pulse width format milliseconds
Cycle time SM address
Initial pulse width SM address
Enable Pulse
generators
PTO1/PWM1,
PTO2/PWM2
Hardware output Built-in I/O

Program conversion process
2.3 Compare the program blocks in the original program and the converted program
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
10 Manual, 1/2010
S7-1200 Device configuration S7-1200 parameter S7-200 parameter
Retentive range setting System block setting
The Tag table can retain a
range of
M memory (2048 byte
maximum)
Retentive Memory Internal flash
memory
A DB editor can retain a
block of DB data. The 2048
byte total is shared between
M and DB memory.
Six ranges in V, T and C
actual values, or M
2.3 Compare the program blocks in the original program and the
converted program
The purpose of the comparison is to identify the subroutines, interrupt routines, and data
block data that were converted.
● Open the original program in STEP 7-Micro/WIN and open the converted program in
STEP 7 Basic, at the same time. Compare the POU (Program Organizational Unit) block
structure of original S7-200 program with the converted STEP 7 Basic program.
● Use the STEP 7-Micro/WIN Instruction tree and open the "Program Block" and "Data
Block" branches.
● Use the STEP 7 Basic Project tree and open the "Project blocks" branch.
The subroutines, interrupt routines, and V memory data groups (data block tabs) created by
STEP 7-Micro/WIN wizards and library usage are protected and are not converted. Also
user-protected POUs or V memory tabs are not converted.
If S7-200 code blocks are not converted, then you must create substitute program logic in
the S7-1200 program. Unconverted code blocks and data block tabs (data groups) can
create undefined symbolic references in POU blocks that were successfully converted.
Undefined symbolic references must be resolved in the STEP 7 Basic program.
For information about specific program logic instructions, see S7-200 LAD instruction
conversion (Page 23).
For more information about how the program structure is converted, see Program structure
conversion (Page 15).

Program conversion process
2.4 Compare the symbols/tags in the original program and the converted program
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
Manual, 1/2010 11
Table 2- 2 POU (Program Organizational Unit) conversion rules
S7-200 program S7-1200 program
Main routine Program cycle OB1
V memory data DB1
Timer and counter instructions Timer instruction with a timer DB (data block)
Counter instruction with a counter DB
SBR subroutine FC (function):
•The converted FC numbering is offset by 1 compared to the
S7-200 SBR number (SBR0 converts to FC1).
•FCs are created with or without local parameters.
•FC call parameters appear in the block interface table of the
STEP 7 Basic block editor which corresponds to the local
variable table of a STEP 7-Micro/WIN subroutine.
INT interrupt routine Hardware interrupt OB or cyclic interrupt OB:
•OBs are created with or without local parameters.
•OB local parameters appear in the block interface table of the
STEP 7 Basic block editor which corresponds to the local
variable table of a STEP 7-Micro/WIN interrupt routine.
Note
STEP 7-Micro/WIN wizard and library (*.mwl file) program code is not converted
This includes subroutines, interrupt routines, V memory data, and symbol definitions. You
must create substitute program logic and program symbols.
2.4 Compare the symbols/tags in the original program and the converted
program
The purpose of the comparison is to identify the symbols that were completely converted,
partially converted, newly created, or not converted.
● Open the original program in STEP 7-Micro/WIN and open the converted program in
STEP 7 Basic, at the same time.
● Compare the STEP 7-Micro/WIN program symbols with the converted STEP 7 Basic
program tags (symbolic references).
Global symbols
● STEP 7-Micro/Win global symbols are defined in the Symbol table.
● The converted STEP 7 Basic global symbols (I, Q, and M memory only) are located in the
PLC Tag table or in data block DB1 (converted S7-200 V memory symbols).

Program conversion process
2.4 Compare the symbols/tags in the original program and the converted program
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
12 Manual, 1/2010
Local symbols
● STEP 7-Micro/Win local symbols are defined in the Local variable tables of the main
routine, subroutines, and interrupt routines.
● The converted STEP 7 Basic local symbols are defined in the Block interface table of the
corresponding OBs (Organizational blocks) and FCs (Functions).
Table 2- 3 Symbol conversion rules
STEP 7-Micro/WIN program
symbolic reference
Converts to this STEP 7 Basic PLC tag STEP 7 Basic programming issues
I, Q, or M memory symbol PLC Tag table I, Q, and M memory tags
AIW and AQW (Analog I/O symbols) PLC Tag table I and Q memory tags
HC symbol name
(High-speed counter)
PLC Tag table I memory tag
The I/O base addresses can be modified
by PLC Device configuration and can
make the converted S7-200 address
incorrect.
SM and S memory symbols Undefined program parameter
The S7-1200 does not have SM or S
memory. Define the parameter name in
substitute program logic.
In the program editor, a red squiggle
underline indicates an undefined
parameter name.
•Make a Tag table entry (I, Q, M, or
constant):
In the program editor, right-click on
the parameter name and select
"Define tag".
•Make a data block reference:
Change the undefined symbol name
to a data block address.
Ex. DB1.SymV0_1
V memory symbol The V memory symbol name becomes
a DB1 data block element name, or the
S7-200 V memory symbol is discarded
because it overlapped the address of
another V memory symbol.
A discarded S7-200 V memory symbol
creates an undefined parameter in
converted program logic. You must
assign a new symbol name and DB1
address.
T (timer memory) and
C (counter memory
Timer and counter symbol names
become the DB names of the data
blocks associated with the converted
timer and counter instructions.
•In S7-1200 LAD programs, The Q
output of counter and timer boxes
replaces the function of the S7-200
counter and timer bit addresses.
•Timer and counter bits/current values
can also be accessed as data
elements within the associated DB.
L memory symbol
(Local variable table)
L memory symbol
(Block interface table)
Note
STEP 7-Micro/WIN wizard and library symbols
The symbols used in subroutines, interrupt routines, and V memory data groups (data block
tabs) created by STEP 7-Micro/WIN wizards or library usage are not converted. Also,
symbols used in user-protected POUs or V memory tabs are not converted.
Unconverted code blocks and data block tabs (data groups) can create undefined symbols in
POU blocks that were successfully converted. You must define these symbols to use
symbolic addressing in substitute program logic.

Program conversion process
2.5 Complete the STEP 7 Basic program and verify the run-time operation
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
Manual, 1/2010 13
2.5 Complete the STEP 7 Basic program and verify the run-time operation
1. Complete all program parameters and program logic.
2. Some S7-1200 CPU I/O channel assignments may use a different I/O channel number
compared to the I/O channel numbers used in the S7-200 program. Reassign and rewire
the terminal block connections as needed.
3. Compile and download the user program to the S7-1200 CPU
4. Debug and verify the run-time operation the S7-1200 program.
Note
Monitoring program variables with STEP 7 Basic
STEP-7 Micro/WIN status charts are not converted. You must create the corresponding
STEP 7 Basic watch tables to monitor run-time data values.
WARNING
Due to functional differences between the S7-200 and S7-1200, your user program may not
have been completely converted
An incomplete or improper conversion of your user program may cause unexpected
machine or process operation which could cause death, serious injury, or property damage.
You must review and check the converted program to ensure proper and safe operation in
your application.

Program conversion process
2.5 Complete the STEP 7 Basic program and verify the run-time operation
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SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
Manual, 1/2010 15
Program structure conversion 3
3.1 Program structure conversion overview
Table 3- 1 S7-200 program components that are converted
STEP 7-Micro/WIN
Program structure
S7-200 to S7-1200 software conversion tool action
POU code blocks The original program block organization is preserved. All blocks that are convertible will
be converted whether or not any convertible code exists in a block. STEP 7-Micro/WIN
programs do not support the STEP 7 Basic block type FB (function block) with an
associated DB (data block). Therefore, all STEP 7-Micro/WIN program blocks are
converted to an equivalent OB (organization block) or a FC (function).
Ladder networks STEP 7-Micro/WIN network numbering, titles, and comments are preserved. If there is
an empty network or complete network that cannot be converted, then an empty or
partially converted STEP 7 Basic network is created.
Box instructions Box instruction placement is preserved. If a box instruction cannot be converted, then a
corresponding generic box is created as a place holder. If the box has more than one
power flow connection, then the additional power flow connections are left open for you
to connect.
Main routine The STEP 7-Micro/Win program Main POU is converted to the STEP 7 Basic program
cycle OB1.
Subroutines STEP 7-Micro/WIN program SBR subroutines are converted to FC functions. FCs are
created with or without local parameters. FC local parameters appear in the block
interface table of the STEP 7 Basic block editor and correspond to the local variable
table parameters of a STEP 7-Micro/WIN subroutine. The converted FC numbering is
offset by 1 compared to the S7-200 SBR number (SBR0 converts to FC1).
Interrupt routines STEP 7-Micro/WIN program INT (interrupt routines) are converted to hardware interrupt
OBs or cyclic interrupt OBs. The S7-200 interrupt attach (ATCH) and detach (DTCH)
instructions are converted to generic box instruction placeholders. You must enable S7-
1200 interrupt events with the CPU device configuration. Then, replace the generic box
instructions with S7-1200 ATTACH and DETACH instructions that use a configured
interrupt event.

Program structure conversion
3.2 Memory addresses
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
16 Manual, 1/2010
Table 3- 2 S7-200 program components that are not converted
STEP 7-Micro/WIN
Program structure
S7-200 to S7-1200 software conversion tool action
System Block STEP 7-Micro/WIN System block parameters are not converted. You must use STEP 7
Basic Device configuration to set up PLC system options.
Wizard code Program code blocks created by STEP 7-Micro/WIN wizards are not converted.
Library code STEP 7-Micro/WIN can use Siemens supplied libraries (USS protocol and Modbus
protocol) and user-defined libraries. Siemens supplied libraries are provided in STEP 7-
Micro/WIN *.mwl file form and are not converted. User-defined library *.mwl files are
created from user-created source program *.mwp files. The *.mwp library source
programs can be converted to STEP 7 Basic programs and assigned as a global or
project library with the STEP 7 Basic library functions.
Status Chart STEP 7-Micro/WIN Status charts are not converted. You must create a STEP 7 Basic
watch table to monitor the run-time values of program variables.
3.2 Memory addresses
Memory addresses are converted as defined in the following table. S7-200 I/O address
ranges are fixed by the CPU operating system. However, you can modify S7-1200 I/O
address ranges during CPU device configuration.
Therefore, the S7-1200 I/O addresses shown in the following table are example addresses
only.
Table 3- 3 S7-200 memory addresses that are converted
STEP 7-Micro/WIN
Program element
S7-200 address Converted S7-1200 memory address
Inputs
(for instructions that use the
Process image)
I0.0 I0.0
Outputs
(for instructions that use the
Process image)
Q0.0 Q0.0
Inputs
(for immediate instructions)
I0.0 I0.0:P
Outputs
(for immediate instructions)
Q0.0 Q0.0:P
Analog Inputs AIWx IWy
Analog Outputs AQWx QWy
Variable Memory VW0 DB1.DBW0
Marker Memory M0.0 M0.0

Program structure conversion
3.2 Memory addresses
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Manual, 1/2010 17
STEP 7-Micro/WIN
Program element
S7-200 address Converted S7-1200 memory address
Timers T32 S7-200 timer symbol names are converted to
S7-1200 timer DB names. S7-200 timer
output bit addresses are converted to a Q bit
address, in the timer DB.
If a S7-200 timer PT (Preset Time) input is a
WORD constant, then the program value is
not converted, for example "100" for PT on
T32 means 100ms. You must convert the S7-
200 program value to the equivalent S7-1200
TIME data format, for example "T#100ms",
"T#59s999ms", or "T# 23h59s999ms".
Counters C10 S7-200 counter symbol names are converted
to S7-1200 counter DB names. S7-200
counter output bit addresses are converted to
a Q bit address, in the counter DB.
High Speed Counter HC0 ID1000 (Input Double Word 1000)
Table 3- 4 S7-200 memory addresses that are not converted
STEP 7-Micro/WIN
Program element
S7-200 address Converted S7-1200 memory address
Special Memory
(System status and control)
SM0.0
SCR (Sequence Control Relay) S0.0
Accumulators AC0
*VD0, *AC0, *LD0Indirect Addressing
&VB0
Undefined parameter in the program logic:
You must assign a new symbol name and
address in a S7-1200 tag group or data block.
Analog value address conversion
S7-1200 analog addresses are set during the STEP 7 Basic device configuration. These
addresses are configured as part of the analog I/O device configuration. Analog value
addressing in the S7-1200 uses I and Q memory addresses. The following table lists the
default address ranges that are assigned to analog values converted from a STEP 7-
Micro/WIN program. You must configure the S7-1200 analog I/O to use these addresses or
substitute other addresses.
Table 3- 5 S7-200 to S7-1200 analog address conversion
Analog I/O S7-200 Analog address S7-1200 Analog address
Analog Input 1 AIW0 IW64
Analog Input 2 AIW2 IW66
Analog Input 3 and following AIW4... IW500...
Analog Output 1 and following AQW0... QW500...

Program structure conversion
3.3 Symbol table
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18 Manual, 1/2010
3.3 Symbol table
STEP 7-Micro/WIN program symbols must be fully defined to be converted. This means that
both the symbol name and corresponding address must be valid.
STEP 7-Micro/WIN program symbols are converted as shown in the following tables.
Table 3- 6 S7-200 symbolic references that are converted
S7-200 symbol S7-1200 symbol conversion result
Symbol name Tag name
Symbol comment Tag comment
I, Q, and M symbols I, Q, and M tags
AIW and AQW (Analog I/O) symbols I and Q tags
HC (High-speed counter) symbols I tags
T (Timer) symbols S7-200 timer symbol names are converted to S7-
1200 timer DB names. S7-200 timer bit and current
value symbols are converted to the corresponding
data names, in the timer DB.
C (Counter) symbols S7-200 counter symbol names are converted to S7-
1200 counter DB names. S7-200 counter bit and
current value symbols are converted to the
corresponding data names, in the counter DB.
V memory symbols Data block element name
L memory symbols in a local variable table L memory symbol in a block interface table
Table 3- 7 S7-200 symbolic references that are not converted
S7-200 Symbol reference S7-1200 symbol conversion result
SM (Special Memory) symbols
S (Sequence Control Relay) symbols
Undefined parameter name in program logic:
You must assign a new symbol name and address in
a S7-1200 tag group or data block.
Wizard generated symbols
Library generated symbols
The generated code blocks and associated tag
names are not converted.
You must make new program logic, tag names, and
memory address assignments.
3.4 Data block
STEP 7-Micro/WIN data block data is converted to a single STEP 7 Basic global data block
DB1. The converted DB1 has the "Symbolic access only" attribute disabled, so you can use
both symbolic and absolute addressing. The STEP 7-Micro/WIN data block has tab sections
which selects a data group in the data block. All tabs that are unprotected will be converted
into a single STEP 7 Basic data block DB1. Data block tabs that are password protected as
"read only" will not be converted. If a data block tab was generated and protected by a STEP
7-Micro/WIN wizard, then you cannot remove the protection and the tab's data group is not
converted.

Program structure conversion
3.5 Interrupt events
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Manual, 1/2010 19
Symbol names for S7-200 V memory addresses as defined in the STEP 7-Micro/WIN
Symbol table are converted to data names in the S7-1200 DB1.
STEP 7-Micro/WIN allows the creation of symbols with overlapping V memory data
addresses. When a S7-200 symbol is assigned a four byte double word V memory address,
you can also create separate symbols for bit, byte, and word addresses contained within the
four bytes.
STEP 7 Basic does not allow symbolic access to overlapping data block addresses. If the
STEP 7-Micro/WIN Symbol table has groups of V memory symbols with overlapping data
addresses, then the symbol name for the largest sized data element is put in the converted
DB1 data block. All other overlapping symbol references are discarded. You must assign
discarded symbol names to new DB1 addresses.
The STEP 7 Basic data block supports an array data type (Array [lo..hi] of type).
Data arrays are created for S7-200 V memory data addresses where:
● No symbol name was assigned.
● There is a V memory address gap between symbolic declarations.
Table 3- 8 V memory to DB1 data conversion examples
Data description S7-200 data block format Converted S7-1200 DB1 format
Decimal value 255 255
Binary value 2#1010 2#1010
Hexadecimal value 1 16#FFFF w#16#FFFF
Floating Point 7.77 7.77
ASCII characters
Byte size
Word size
Dword size
1, 2, or 4 bytes
'a'
'ab'
'abcd'
'a'
'ab'
'abcd'
Multiple ASCII
characters 2
3, 5, or more bytes
‘abcde’
‘abcde’
String 3 "abcde" ‘abcde’
1 Size descriptor ("w") depends upon data type
2 Converted to S7-1200 string format
3 The S7-1200 string storage format requires one byte more than the S7-200 string storage format.
The extra byte is used to store the maximum string length.
3.5 Interrupt events
The S7-200 interrupt attach (ATCH) and detach (DTCH) instructions are converted to
generic box instruction placeholders. You must enable S7-1200 interrupt events with the
CPU device configuration. Then, replace the generic box instructions with S7-1200 ATTACH
and DETACH instructions that use a configured interrupt event.
STEP 7-Micro/WIN program INT interrupt routines are converted to hardware interrupt OBs
or cyclic interrupt OBs, as shown in the following tables.

Program structure conversion
3.5 Interrupt events
SIMATIC S7-200 to SIMATIC S7-1200 software conversion tool
20 Manual, 1/2010
Table 3- 9 Conversion of S7-200 highest interrupt priority (communication)
S7-200
event
number
S7-200 Interrupt event S7-1200 Interrupt OB conversion result
8 Port 0: Rcv character Hardware interrupt OB
9 Port 0: Xmt complete Hardware interrupt OB
23 Port 0: Rcv msg complete Hardware interrupt OB
24 Port 1: Rcv msg complete Hardware interrupt OB
25 Port 1: Rcv character Hardware interrupt OB
26 Port 1: Xmt complete Hardware interrupt OB
19 PTO 0 complete interrupt Hardware interrupt OB
20 PTO 1 complete interrupt Hardware interrupt OB
Table 3- 10 Conversion of S7-200 middle interrupt priority (discrete input)
S7-200
event
number
S7-200 Interrupt event S7-1200 Interrupt OB conversion result
0 Rising edge, I0.0 Hardware interrupt OB
2 Rising edge, I0.1 Hardware interrupt OB
4 Rising edge, I0.2 Hardware interrupt OB
6 Rising edge, I0.3 Hardware interrupt OB
1 Falling edge, I0.0 Hardware interrupt OB
3 Falling edge, I0.1 Hardware interrupt OB
5 Falling edge, I0.2 Hardware interrupt OB
7 Falling edge, I0.3 Hardware interrupt OB
12 (HSC0) CV=PV Hardware interrupt OB
27 (HSC0) direction changed Hardware interrupt OB
28 (HSC0) external reset Hardware interrupt OB
13 (HSC1) CV=PV Hardware interrupt OB
14 (HSC1) direction changed Hardware interrupt OB
15 (HSC1) external reset Hardware interrupt OB
16 (HSC2) CV=PV Hardware interrupt OB
17 (HSC2) direction changed Hardware interrupt OB
18 (HSC2) external reset Hardware interrupt OB
32 (HSC3) CV=PV Hardware interrupt OB
29 (HSC4) CV=PV Hardware interrupt OB
30 (HSC4) direction changed Hardware interrupt OB
31 (HSC4) external reset Hardware interrupt OB
33 (HSC5) CV=PV Hardware interrupt OB