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TECHNICAL NOTE

ALARM RESET Function Block

Function block for MP2000 series

<ALRMRST> Function Block Summary

The “ALARMRST” block is used to reset any servo alarm as well as RDA errors in MW3**81 and

MW3**82. Not all errors can be cleared from the reset clock. Some errors will require cycling the power.

Function block diagram

<ALRMRST> Function block Operation Notes

• To use the function block, the EXECUTE input must see a rising edge. The reset

bit (ACR) will go on as long as the EXECUTE input is on.

• Related Function Blocks: Errors that can be reset with this block can be

detected by Read Error Function Block (RDERROR).

• Alarm Indication and Reset Registers Used:

o ACR (OBxx00F): Alarm Clear, used to clear alarms in system

o Warning (Ilxx02): Warning information on the axis displayed in the bit.

o Alarm (Ilxx04): Alarm information on the axis displayed in the bit.

o Servo driver alarm (IBxx2C0): Servo driver alarm

o Servo alarm code (IWxx2D): Refer to the manual of the servo amplifier for

details of the servo amplifier alarm code.

o CPU error (SW00041): CPU Error Status System Register. This is not

used for the detection purpose, but can be used to help the user

determine more information about the alarm. This register indicates

bitwise: Serious failure, Program memory error, User operation error, I/O

error, and Transmission errors. Refer to Chapter 10 of the user's manual

(Trouble shoot) for details.

• The servo alarm: This block will set ACR to initiate alarm clear. The ACR bit is

reset request of the alarm to the controller. If the alarm is not cleared within

500msec, the block will error out and the ERROR output will turn on. If the alarm

is cleared, the DONE output will be latched on.

• RDA alarms: : This block will set MW3xx81(ERRID1) and MW3xx82(ERRID2)

both to zero.

File: MP2000_IndividualFunctionDocument_RevC 122/168

Doc Number: eng.MCD.05.101 11/17/2005

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Yaskawa MP2000 Manual do Utilizador Página 122