Vicor PI33XX-2X I2C Digital Interface Guide - Manual (Page 21)

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PI33XX-2X I
2
C Digital Interface Guide
Error Messages
Missing or Malfunctioning I2C Interface Error:
The error message shown in Figure 27 occurs only at the first boot of the Picor Buck GUI each time the program is
executed. During program initialization, the software determines the existence of the LinkM USB interface. If the
hardware or software interface from the computer USB port to the LinkM is either not connected, missing or
malfunctioning, Picor Buck GUI will display this error message. If some error occurs with this interface during
program execution, a different error message will be displayed. This error ONLY applies to the USB portion of the
LinkM and does not indicate any problem with the PI33XX-2X or the LinkM I
2 C bus interface.
Figure 27 - Fatal Error Message at Picor Buck GUI Boot
Incorrect I2C Address or Missing Unit Error:
The error message shown in Figure 28 occurs during Picor Buck GUI program execution if either the PI33XX-2X or
LinkM I
2 C interface is malfunctioning. It will also occur during program execution if the PC to USB or LinkM USB
hardware or software interface is malfunctioning. If the USB portion of the interface is at fault, Picor Buck GUI can
not recover and will continue to display this error even if the USB interface problem is corrected. Picor Buck GUI
will need to be closed and restarted to reestablish USB connectivity with Picor Buck GUI. If the I
2
C interface is the
problem, the error will clear without restarting Picor Buck GUI once the problem is corrected. It is very important
to note that a failure of the critical interface to either the LinkM or the PI33XX-2X during a programming operation
can result in the incorrect or unintentional programming of parameters. If the user encounters this error during a
programming operation:
1. Remove input power to the PI33XX.
2. Exit Picor Buck GUI.
3. Restore power to the PI33XX-2X
4. Restart Picor Buck GUI.
Figure 28 - I
2
C Bus or USB Error Message During Picor Buck GUI Execution