
100 CoDeSys 2.3 Runtime Environment
WAGO-I/O-SYSTEM 750
758-874/000-131
WAGO-I/O-IPC-C6
Manual
Version 1.0.0
Table 52: Memory Areas for the Input and Output Data of CoDeSys
Memory
Area
Description
Access via
MODBUS-
TCP
Access via
PLC
Logical Address Space
Word
%MW0 to
%MW 4095
Flag variables 8 kB residual memory in
the SRAM.
Declared with "AT
%M<Address>".
(Expandable to 24 kB)
Read/
Write
Read/
Write
Byte
%MB0 to %MB8190
(%MW12287)
Retain
variables
Symbolic addressable
retain memory in the
SRAM: 1023 kBytes
Read/
Write
*
The use of up to 250 I/O modules is possible with the WAGO internal data bus extension
modules.
**
O
nly for I/O-IPC with fieldbus connections
The total memory size for flag and retain variables is 1023 kB). Use bit-oriented
addressing and observe that the base address is word-oriented. The bits are in the
areas 0 to 15.
Activating "Control Mode" in WAGO-IO-CHECK!
Using WAGO-IO-CHECK, you can overwrite parameters and process data in
"Control Mode" regardless of whether the fieldbus or PLC functionalities are
enabled or disabled. By doing so, machine components may be placed in a
dangerous state and personnel and machines may be at risk.
Before changing parameters and process data, ensure that the machine
components are in a safe and defined state and switch off the higher-level
controller. Also ensure before start-up that no personnel remain in the danger area
of the machine components.
Adaptation of the remanent memory area
When creating a project, a configuration window for the selection of the
destination system appears (see section "Designing a Project and Selecting the
Target System").
1.
To adapt the remanent memory area, click on the "Memory Layout" tab in
the "Target Settings" configuration window.
2.
Enter the following values in the "Memory" and "Retain" field: