Over-Voltage Protection
If the voltage supply to the amplifier rises above 94 VDC, then the amplifier will automatically disable. The
amplifier will re-enable when the supply drops below 90 V.
The over voltage condition will not permanently shut down the amplifier or trigger the #AMPERR routine. The
amplifier will be momentarily disabled; when the condition goes away, the amplifier will continue normal
operation assuming it did not cause the position error to exceed the error limit.
WARNING
If this error occurs, it is indicative of a problem at the system level. An Over-Voltage error is usually
due to regeneration from the motor and load. Consider using a shunt regulator if this occurs
during normal operation.
Over-Current Protection
The amplifier also has circuitry to protect against over-current. If the total current from a set of 2 axes (ie A and B
or C and D) exceeds 40 A, the amplifier will be disabled. The amplifier will not be re-enabled until there is no longer
an over-current draw and then either SH command has been sent or the controller is reset. Since the AMP-43240
is a transconductance amplifier, the amplifier will never go into this mode during normal operation. The amplifier
will be shut down regardless of the setting of OE, or the presence of the #AMPERR routine.
WARNING
If this error occurs, it is indicative of a problem at the system level. An Over-Current error is usually
due to a short across the motor leads or a short from a motor lead to ground.
Over-Temperature Protection
The amplifier is also equipped with over-temperature protection.
If the average heat sink temperature rises above 80°C, then the amplifier will be disabled. The over-temperature
condition will trigger the #AMPERR routine if included in the program on the controller.
The amplifier will not be re-enabled until the temperature drops below 80°C and then either an SH command is
sent to the controller, or the controller is reset (RS command or power cycle).
WARNING
An Over-Temperature error is usually due to insufficient heat dissipation from the amplifier. Heat
must be drawn away from the base of the controller with forced air flow or a heat sink.
A3 – AMP-43240 (-D3240) ▫ 201 DMC-41x3 User Manual
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