5221C1 Phoenix Contact GmbH & Co. Postfach 1341 32819 Blomberg Germany
12
User-Defined Combination of Module Address Areas:
You can set the address area or parts of the address area of a module to any address of the control
or computer system. Byte limits must not be exceeded.
Modules can be distributed anywhere in the INTERBUS ring.
Automatic Combination of the Address Areas of Modules in One Word (Automatic Filling of
Words) With the Generation 4 Firmware:
When combining automatically, the firmware groups together the address areas of consecutive
modules with the same data direction according to the following principles:
- Two consecutive modules on the INTERBUS ring with up to four bits are grouped together in one
byte.
The first module occupies the lower bits of the byte, the second module occupies the higher bits.
In a word the higher byte is occupied first.
- Each byte module occupies a new byte address.
The higher byte is occupied first (see Tables 6 and 7).
- Each word module occupies a new word address.
When several modules are used in combination with one of the above controller
boards, the addresses of two or more modules can be combined in one word per data
direction. This avoids gaps in the address area of the control or computer system.
Addressing by the user (user-defined combination) and default addressing by the
control system (automatic combination) have to be differentiated:
© Phoenix Contact 01/2000 TNR 94 08 49 6
