Error Monitoring and Protection
The amplifier is protected against Over-Current, Over-Voltage, Over-Temperature, and Under-Voltage conditions.
These conditions are reported as amplifier errors via the TA command and are cleared with the AZ command.
The user has the option to include the automatic subroutine #AMPERR in their program to handle amplifier errors.
As long as the #AMPERR label is included in the program that is on the controller, the program will jump to the
label when an amplifier error is detected and begin executing the user defined routine.
TA n is used to monitor amplifier errors with n = 0-3. The command will return an eight bit bitmask representing
specific error conditions. It will also report whether an amplifier error is latched for the bank of axes A - D or the
bank of axes E - H. See the TA command in the Command Reference for detailed information on bit status during
error conditions.
Over-Current Protection
If there is a short circuit in the amplifier or motor, an Over-Current error will be reported and the amplifier will be
disabled. Since the AMP-43547 is a trans-conductance amplifier, the amplifier should not encounter this error
during normal operation. The Over-Current amplifier error is a latching error, see the Clearing Latched Amplifier
Errors section for details.
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-Voltage Protection
If the voltage supplied to the amplifier rises above its rated supply voltage, an Over-Voltage error will be reported.
While the amplifier is experiencing this condition, current is no longer commanded and the motor phases are
shorted together. This results in a drag on the motors causing them to coast to a stop. The amplifier will resume
commanding current when the voltage drops below the maximum rated supply voltage. The Over-Voltage
amplifier error is not a latching error.
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-Temperature Protection
If the average amplifier temperature rises above 80°C, an Over-Temperature error will be reported and the
amplifier will be disabled. The error cannot be cleared until the temperature drops below 80°C. The Over-
Temperature amplifier error is a latching error, see the Clearing Latched Amplifier Errors section for details.
NOTE: 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.
Under-Voltage Protection
If the voltage supplied to the amplifier drops below its rated supply voltage, an Under-Voltage error will be
reported and the amplifier will be disabled. The error cannot be cleared until the supply voltage raises above its
minimum rated supply voltage. The Under-Voltage amplifier error is a latching error, see the Clearing Latched
Amplifier Errors section for details.
A5 – AMP-43547 (-D3547, -D3527) ▫ 215 DMC-41x3 User Manual
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