280 Run-time System CODESYS 2.3
WAGO-I/O-SYSTEM 750 XTR
750-8212/040-010 PFC200 G2 2ETH M12 RS XTR
Manual
Version 1.0.0, valid from FW version 03.01.07(13)
8.7
Access to Process Images of the Input and Output
Data via CODESYS 2.3
The following tables describe the possibilities with which you can access the
address ranges of the process image for the inputs and outputs connected to the
local bus.
Table 205: Access to the Process Images of the Input and Output Data – Local Bus
Memory Area
Description
Access
via PLC
Logical Address Space
Local bus input
process image
Map of the local input modules
(I/O module 1 to 64
*
) in the RAM
Read
Word
%IW0 to %IW999
Byte
%IB0 to %IB1999
Local bus output
process image
Map of the local output modules
(I/O module 1 to 64
*
) in the RAM
Read/
Write
Word
%QW0 to %QW999
Byte
%QB0 to %QB1999
* The use of up to 250 I/O modules is possible with the WAGO local bus extension modules.
Table 206: Access to the Process Images of the Input and Output Data – Modbus
Memory area
Description
Access via
PLC
Logical Address Space
Modbus input
process image
Modbus input variables,
addressed by word via Modbus
Read
Word
%IW1000 to %IW1999
Byte
%IB2000 to %IB3999
Modbus input variables,
addressed by bit via Modbus
Read
Bit
%IX1000.0 …%IX1000.15 to
%IX1384.0 … %IX1384.15
Modbus output
process image
Modbus output variables,
addressed by word via Modbus
Read/
Write
Word
%QW1000 to %QW1999
Byte
%QB2000 to %QB3999
Modbus output variables,
addressed by bit via Modbus
Read/
Write
Bit
%QX1000.0 …
%QX1000.15 to %QX1384.0
… %QX1384.15
Table 207: Access to the Process Images of the Input and Output Data – Flags
Memory Area
Description
Access via
PLC
Logical Address Space
Flag variables
Total of 128 kB remanent
memory (65536 words).
Read/
Write
%MW0 to
%MW65535
104 kB addressed by word via
Modbus (53248 words)
Read/
Write
Word (Modbus)
%MW0 to %MW3327
6.5 kB addressed by bit via
Modbus (3328 words).
Read/
Write
Bit (Modbus)
%MX0.0 … %MX0.15 to
%MX3327.0
…
%MX3327.15
Retain variables Retain memory addressed by
symbols in the NVRAM: 128 kB
Read/
Write
-
* The use of up to 250 I/O modules is possible with the WAGO local bus extension modules.
The total size of the memory for flag and retain variables is 128 kB (131060
bytes). The size of these two sections can be customized as required, provided
the total (permissible) size is not exceeded.