Troubleshooting

This controller has an alarm function to protect against temperature rise, poor connection, operating error, and the like.

If an alarm is generated, the ALM-A output is turned ON and the ALM-B output is turned OFF to stop the robot. At this time, the motors remain in an excitation state. At the same time, the ALM LED blinks in red.

The alarm that is being generated can be checked via communication, using the MRC Studio software, or by counting the number of blinks of the ALM LED.

Refer to the USER MANUAL of the MRC01 controller for the alarm list or timing chart.

Alarm reset

Before resetting an alarm, always correct the cause of the alarm and ensure safety, and perform any of the reset operations listed below.

Note

Some alarms can only be reset by turning the power off and on again.
  • Turn the ALM-RST input from OFF to ON. (It is enabled at the ON edge. )
  • Execute the alarm reset by the maintenance command via communication.
  • Execute the alarm reset using the MRC Studio software.
  • Turn the power off and on again.

Alarm history

Up to 10 generated alarm items are stored in non-volatile memory in order from most recent to oldest. The stored alarm history can be read or cleared if any of the following operations is performed.

  • Read the alarm history with the monitor command via communication.
  • Clear the alarm history with the maintenance command via communication.
  • Read or clear the alarm history using the MRC Studio software.

The controller is equipped with a function to generate information output before an alarm is generated. This function can be used for periodic maintenance of equipment by setting an appropriate value in the parameter of each information.

Refer to the USER MANUAL for details on the related parameters and information list.

Status when information is generated

Information bit output

If information is generated, a bit output (INFO-** output) of the corresponding information is turned ON. A desired output signal can be assigned to the INFO-USRIO output among the bit outputs and used. If the assigned output signal is turned ON, the INFO-USRIO output is also turned ON.

INFO output

If information is generated, the INFO output is turned ON.

Operation of robot

The robot continues to operate even while information is being generated, unlike in the case of an alarm. However, in some information, the robot may stop operating when information is generated.

Clearing information

How to clear the information can be set with the “Information auto clear” parameter.

When the “Information auto clear” parameter is set to “1: Enable” (initial value)

The generated information will be automatically cleared if the condition for clearing the information is met.

When the “Information auto clear” parameter is set to “0: Disable”

Even if the condition for clearing the information is met, the information remains generated. The information can be cleared if any of the following is performed in a state where the condition for the clearing information is met.

  • Execute the clear information with the maintenance command via communication.

  • Execute the clear information on the information monitor of the MRC Studio software.

  • Turn the INFO-CLR input ON.

  • Turn the power off and on again.

Information history

Up to 16 generated information items are stored in RAM in order from most recent to oldest. The information stored as the information history is the information code, the time of generation, and the information content.

The stored information history can be read or cleared if any of the following operations is performed.

  • Read the information history with the monitor command via communication.

  • Clear the information history with the maintenance command via communication.

  • Read or clear the information history using the MRC Studio software.

Tip

The information history is cleared when the power supply of the controller is turned off, as it is stored in RAM.