Fieldbus coupler/controller
• 75
Review
Modular I/O System
L
ON
W
ORKS
®
Attention
Enter the absolute address character strings without blanks!
Fig. 3-6: Examples for absolute addresses
g912203e
Note
For the number of input and output bits or bytes of the individual I/O modules
please refer to the corresponding I/O module description.
The data width of the PFC variables depends on the according data type.
3.2.6.2.1 Addressing the I/O modules
Upon switching on the supply voltage, the data of the I/O modules are mapped
into the process image.
The PFC functions simular to that of a PLC’s CPU enable the bus modules da-
ta and PFC variables to be processed within the IEC 61131-3 environment as
internal applications, such as linking DIs with DOs. With absolute addresses,
the CPU directly accesses the bus module data in the respective memory range
(word 0 to 255).
Following this, the linking results can be directly written in the output data via
absolute addressing.