National Instruments NI-FBUS - Manual (Page 110)

© National Instruments Corporation B-1 NI-FBUS Configurator User Manual
B
Troubleshooting and
Common Questions
Mode Problems
A function block alternates between Iman and Auto modes.
The status of the input parameter is Bad::No comm .
The function block and communication schedules do not have enough time
between them. Complete the following steps:
1. Edit the schedule to add more time between the function block and
communication schedules. To edit the schedule, double-click the
Schedule icon in the configuration tree.
For more information about editing the schedule, refer to the View and
Edit a Schedule section of Chapter 2, Using the NI-FBUS
Configurator .
2. After you edit the schedule, select Configure»Download
Configuration to download the changes.
For more information about downloading the configuration, refer to
the
Download a Project Configuration section of Chapter 2, Using the
NI-FBUS Configurator .
The PID does not transition to Auto mode.
If the status of an OUT or BKCAL_OUT parameter on an AI or AO block is
Bad::Not Connected or Bad::No Comm , or the downstream block is
not in cascade mode, complete the following steps:
1. Use the Monitor mode to make sure that the AI and AO blocks are
publishing correct values.
2. Make sure that the LAS executes the communication schedule. Use
monitoring mode to view the modes, inputs, and outputs of the block.
If the LAS is not executing the schedule, select Configure»Download
Configuration to download the configuration.