QUESTION:
How can I port programs with packed I/O addresses to a IM 151-7
CPU?
ANSWER:
The IM 151-7 CPU (6ES7 151-7AA10-0AB0) can only work with unpacked
I/O addresses. Programs or FBs with packed I/O addresses have
to be rewired which equivalent to "unpacking". How a
user program is ported depends on the operands used in the user
programm that access these packed addresses:
- If you only access packed I/O with bit
operands (e. g. O0.1; I1.5;...) the rewiring is made
automatically in SIMATIC Manager. For this highlight folder
"Blocks" and execute command "Extras > Rewiring...". In field
"Rewiring" enter now in the table the desired replacements (old/
new operand). More details on "rewiring" can be found under "Notes
on rewiring operands" - Entry ID: 11791432).
Example:
Use a standard IM 151-1 (6ES7 151-1AA03-0AB0) with
a power module and four electronic modules 2-DO. The output
adresses of the four 2-DO electronic modules (6ES7 132-4FB00-0AB0)
were "packed":
- 1st electronic module: O 0.0..0.1
- 2nd electronic module: O 0.2..0.3
- 3rd electronic module: O 0.4..0.5
- 4th electronic module: O
0.6..0.7
The user program, in which bit operands access the packed
outputs, is meant to be ported to a CPU IM151-7. Thus, the
packed address area of O0.0 - O0.7 is no longer available. The
"unpacked" address assignment could therefore be as follows:
- 1st electronic module: O 0.0..0.1
- 2nd electronic module: O 1.0..1.1
- 3rd electronic module: O 2.0..2.1
- 4th electronic module: O 3.0..3.1
In this case, the table of dialog "Rewiring" is to be
filled with the subsequent data:
|
Old Operand |
New Operand |
| 1 |
O0.2 |
O1.0 |
| 2 |
O0.3 |
O1.1 |
| 3 |
O0.4 |
O2.0 |
| 4 |
O0.5 |
O2.1 |
| 5 |
O0.6 |
O3.0 |
| 6 |
O0.6 |
O3.1 |
Table 1: Example for Item "Rewiring..."
- If, in addition to bit operands, operand areas
(e.g. BYTE, WORD, DWORD) are also used that access to packed I/O
data, then rewiring has to be done manually.
Example:
You use a IM 151-1 Standard (6ES7 151-1AA03-0AB0)
with a power module and four 2-DI electronic modules. Input
addresses of the four 2-DI electronic modules (6ES7 131-4FB00-0AB0)
were "packed":
- 1st electronic module: I 0.0..0.1
- 2nd electronic module: I 0.2..0.3
- 3rd electronic module: I 0.4..0.5
- 4th electronic module: I 0.6..0.7
In the user program those inputs are then retrieved e. g. via
the command "L IB 0 " and processed.
It is now intended to be ported to a IM151-7 CPU. The packed
address area of I0.0 - I0.7 (IB 0) is therefore no longer
available. The "unpacked" address assignment could therefore be as
follows:
- 1st electronic module: I 0.0..0.1
- 2nd electronic module: I 1.0..1.1
- 3rd electronic module: I 2.0..2.1
- 4th electronic module: I 3.0..3.1
In this case, the command "L IB 0 "
either has to be split into bit operands with new address areas or
the input addresses are grouped to a new marker byte at the
beginning of the OB 1 (e. g. MB 0) for further
processing.
For details, please see
- manual "ET 200S Interfacemodul IM 151-7 CPU, edition 11/2003,
Chapter 12.2", available under Entry-ID: 12714722
- online help of STEP 7, key word "Rewiring"
|
german
