Figure 10: FX-PCA3611 with cover removed showing EOL switch and jumper positions
Setting the End-of-Line (EOL) switch
Each controller has an EOL switch, which, when set to ON, sets the controller as a terminating
device on the bus. See Figure 10 for the EOL switch location. The default EOL switch position is Off.
Figure 11: End-of-Line switch positions
To set the EOL switch on a PCA3613 controller, complete the following steps:
1. Determine the physical location of the controller on the FC bus.
2. Determine if the controller must be set as a terminating device on the bus.
Note:
For detailed information regarding EOL termination rules and EOL switch settings
on FC buses, refer to the following documents depending on your system (FX or BCPro):
MS/TP Communications Bus for the BCPro System Technical Bulletin (LIT-12011908)
or
FX-PC
Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670)
.
3. If the controller is a terminating device on the FC bus, set the EOL switch to ON. If the
controller is not a terminating device on the bus, set the EOL switch to Off.
When a controller is connected to power with its EOL switch set to ON, the amber EOL LED on
the controller cover is lit.
PCA3613 Advanced Application Programmable Controller Installation Instructions
24