Delta Tau 3Ax-602646-xUxx LED Fault Indicator, Global Fault Only, Global and Axis-Specific Faults

Quad Amp Hardware Reference Manual

Note:

Jumpers E1A, E1B, E2A, E2B, E3A, E3B, E4A, E4B must be installed on the current sense board so that the 4-bit fault code can be accessed at PMAC2 Gate Array Registers.

Once such a condition occurs, the PLC notifies the user with an on-screen message and then disables itself. Note that C is a hex fault code for Bus under voltage and its decimal representation is 12.

LED Fault Indicator

The fault information is reported as a 4-bit value (0-15 decimal, 0-F hex). A value of 0 indicates no fault. A value greater than 0 specifies a fault and the number indicates which fault.

Global faults are numbered in the range 8-F (hex). Axis-specific fault codes are numbered in the range 1- 7 (hex). In the case of multiple faults, the higher-numbered fault condition is reported.

If there is no fault condition, the display will indicate a 0. With a 0 in the display, the left decimal point shall be lit if any of the axes is enabled. The right decimal point shall be lit if the internal shunt is active.

The LED fault indicator will provide a following common fault code for the Quad Amplifier:

0	Everything O.K.
1	General firing module fault
2	Module over temperature
3	Ground fault
4	Over current (surge) fault
5	Motor over temperature
6	TBD
7	TBD
8	Heat-sink over temperature fault
9	High PWM frequency fault
A	DAC (nonPWM) fault
B	Bus over voltage
C	Bus under voltage
D	General Power Supply/Soft Start fault
E	TBD
F	TBD

Global Fault Only

In the case of a global fault only, the display will indicate the fault number from 8-F (hex). In the case of multiple global faults, the higher numbered fault will be displayed. The decimal point shall be off (pending possible future use).

Global and Axis-Specific Faults

In the case of an axis-specific fault and a global fault, the global fault shall be indicated.

Axis-Specific Fault Only

In the case of an axis-specific fault on any axis, the display will indicate the fault number from 1-7. The two decimal points shall be used to indicate which axis has the fault in the following manner:

Axis 1:	Left off	Right off
Axis 2:	Left off	Right on
Axis 3:	Left on	Right off
Axis 4:	Left on	Right on

30 Troubleshooting