Servotronix CDHD, User Manual

Page: 45 / 50

CDHD Troubleshooting
User Manual 39
6 Troubleshooting
6.1 Drive Status 7-Segment Display
The 7-segment display provides various indications of drive status, such as
operation modes, drive enable status, and fault conditions.
The display uses the following conventions:

Decimal point – indicates the drive’s Enable/Disable status; if displayed, the
drive is enabled.

Steadily lit digit – indicates the specific operation mode (OPMODE) currently
in effect.

Steadily lit letter – indicates a warning

Flashing sequence of letters and digits – indicates a fault

Flashing letter or digit – a special case (such as encoder initialization, motor
setup).
In the event of concurrent faults, only one fault code is displayed on the
7-segment display. The display shows the code of the fault with the highest
priority.
Refer to Table
6-1 for a complete list of fault codes, names and descriptions.
6.2 Faults and Warnings
If the CDHD is connected to a host computer via the USB or RS232 ports, it
communicates fault codes to the computer by means of a text message. This
message is saved in a fault history log (FLTHIST) in the drive’s non-volatile
memory, so that the fault history is not lost when power is removed from the
drive.

Warnings are not considered faults and do not disable operation. The
system automatically clears the warning state when the condition that
generated the warning no longer exists.

Faults automatically disable the drive and a fault status is indicated on the
drive’s display. The drive fault status is generally latched, and the drive
cannot be enabled until the fault status is explicitly cleared. Only if the fault
condition no longer exists can the fault status be cleared. It is done by
either of the following:

Toggling the drive enable. This is done either by executing a drive
disable command (K) followed by the enabled (EN) command or by
toggling the Remote Enable line (REMOTE).

In some systems, a specific drive input is defined as Alarm Clear. In this
case, toggling this input will clear the fault.
If the fault condition no longer exists, the drive is re-enabled.

Some faults are referred to as Fatal faults since they disable almost all
drive functions (including communications) and prevent the drive from being
enabled. This condition is typical of faults due to internal failures, such as a