JerryH
Member
Hi all,
I am going to change an existing Beckhoff I/O system that currently is using CanOpen to Devicenet. I've been trying to figure out the layout of the data I will see on devicenet coming from a rack of Beckhoff I/O through a BK5220 Bus Coupler. The analog I/O makes sense, two bytes for each channel. The digital I/O makes no sense to me. They are allocating a bit for each channel of digital.
Taken from their manual:
Any have any experiance with this and can help me understand?
thanks,
Jerry
I am going to change an existing Beckhoff I/O system that currently is using CanOpen to Devicenet. I've been trying to figure out the layout of the data I will see on devicenet coming from a rack of Beckhoff I/O through a BK5220 Bus Coupler. The analog I/O makes sense, two bytes for each channel. The digital I/O makes no sense to me. They are allocating a bit for each channel of digital.
Taken from their manual:
When the last analog output terminal in the terminal strip has received its
data, the digital outputs are served. Data is always transferred in the form
of bytes, so the next byte from the data string contains data for 8 digital
outputs. Bit 0 and bit 1 are assigned to channels 1 and 2 of the first digital
output terminal after the Bus Coupler. Other types of terminal which are
located in between are ignored.
Bits 2 and 3 go to the 2 channels of the second digital output terminal, bits
4 and 5 to the third and bits 6 and 7 to the fourth.data, the digital outputs are served. Data is always transferred in the form
of bytes, so the next byte from the data string contains data for 8 digital
outputs. Bit 0 and bit 1 are assigned to channels 1 and 2 of the first digital
output terminal after the Bus Coupler. Other types of terminal which are
located in between are ignored.
Bits 2 and 3 go to the 2 channels of the second digital output terminal, bits
Any have any experiance with this and can help me understand?
thanks,
Jerry
Last edited:
