X-Ray Generation Error Codes

At power-up the PPC kV control performs its own initialization, checks its memory integrity (checksum of program and NVRAM) and starts the communication with its peripherals as well as the system. Communication is permanently checked afterwards. It then initializes the Rotation board and Heater board with their respective database parameters and loads PPC kV control FPGA. Eight LEDs (from DS17 to DS24) on PPC kV control board show the software status. During power-on, the Heater board and the Rotation board CPUs are initialized and check their memory integrity and hardware. If a problem is encountered, a PRD error is reported to the PPC kV control.

Under application mode the generator continuously monitors the correct operation of its functions. Faults are reported through an error code and associated message. Some are straightforward and convey the root cause. Refer to the recommended action in the error list and troubleshooting guide.

On the generator we can also perform test to check its functions independently.

• heating function

• rotation function

• inverter gate command diagnostic

• inverter in short circuit diagnostic

• no load HV function diagnostics

• Fan diagnostics

These tests are referred to as manual diagnostics or diagnostics. Diagnostics are usually implemented in the system console or in the service software (executed from the service laptop).

Application self tests and diagnostics generate errors. The error code structure described in this section applies to JEDI error detection and logging. The JEDI error log file can be accessed from the system through the system console or a laptop (JEDI error log upload functionality).

When an error is detected, it is sent to the system and is logged in parallel in the JEDI error log file. The file contains a maximum of sixty-four logs.

Each log shows the following structure:

The fields are described in the following sections.

The simplified error code is a grouping of the JEDI error codes. This field gives a rapid understanding of which part of JEDI is faulty.

The generator phase field contains the state of the generator when the error occurred.

There are five classes of errors that correspond to different levels of impact to the system. The class of errors corresponds to the seriousness of the error and the system software will manage operations.

Each error code comprises two fields (which cannot be generated and used separately);

• the first field describes the JEDI function which is faulty (referred to as the function code)

• the second field describes the error detected.

Example: error code 0306 means:

• 03: high voltage generation function;

• 06: no kV feedback on anode.

The field data associated with the error code shows detailed information over the state of the generator when the error occurred.

Examples: rotation high speed acceleration state, small focus preheat.

The field number of occurrences is used to log the same error occurring several times consecutively. Instead of filling the error log file with the same error, which has occurred consecutively several times, the first error is logged and successive errors are recorded through increasing the ”number of occurrences” field.

The field date & time stores the date and time when the error occurred. This is the JEDI internal date and time, which may be different form the system date and time. In the case of logging the same error several times, the field indicates the date and time of the first occurrence.

Not Applicable to Jedi 60DC and Lite.

Not Applicable to Jedi 60DC and Lite.

Not Applicable to Jedi 60DC and Lite.