BECKHOFF M2510 - Manual (Page 5)

M2510 Analog Input Beckhoff II/O Lightbus System
Date: 20.08.93 Version : 2.0 Page 5 of 11
2. Function Description - Software
The 4 ADCs work in stand alone mode. They are triggered by the 'CYCLE' signal, when the
telegram is received.
When the twelve bit of data are read, the transformation result of the previous cycle is used.
There is no need for selection or other communications, since all control signals needed are
created by the hardware.
As there are always 2 ADCs read in a 32 bit telegram, two addresses in the II/O system have
to be reserved for the whole module.
II/O Lightbus
Address 1
ADC 2 ADC 1
Port D3 Port D2 Port D1 Port D0
LSB DDDD DDDD DDDD DDDD
MSB xxxx DDDD xxxx DDDD
II/O Lightbus
Address 2
ADC 4 ADC 3
Port D3 Port D2 Port D1 Port D0
LSB DDDD DDDD DDDD DDDD
MSB xxxx DDDD xxxx DDDD