Publication 20D-UM002C-EN-P - November 2003
7-22 Communicating with Devices on a ControlNet Link
Determining the API
The API (actual packets per interval) is related to the RPI for the connection
and the NUT of the network. Use this table to select the API to enter in the
above worksheet:
Example 1: DriveLogix
Controller and Remote I/O
In the following example, one DriveLogix controller controls remote I/O
through a 1794-ACN15 module.
If: Enter this value for the API:
RPI ≥ NUT and RPI < 2∗NUT NUT
RPI ≥ 2∗NUT and RPI < 4∗NUT 2∗NUT
RPI ≥ 4∗NUT and RPI < 8∗NUT 4∗NUT
RPI ≥ 8∗NUT and RPI < 16∗NUT 8∗NUT
RPI ≥ 16∗NUT and RPI < 32∗NUT 16∗NUT
RPI ≥ 32∗NUT and RPI < 64∗NUT 32∗NUT
RPI ≥ 64∗NUT and RPI < 128∗NUT 64∗NUT
RPI ≥ 128∗NUT 128∗NUT
DriveLogix controller
(DriveLogix1)
ControlNet
1794-ACN with remote I/O
(Remote1)
