HMM Purge old alerts on power on

Anyone have an easy way to purge old alerts on power on ?
I am using unitronics V120 series and there doesn't seem to be an obvious way to do this on the very first power on scan

SB 2 is the power-up bit in V120 Unitronicsland.

Could you explain what a "power-up bit" is?

JoeTauser said:

SB 2 is the power-up bit in V120 Unitronicsland.

Click to expand...

A "power-up" bit is a special internal bit (SB stands for "system bit") that is on only for the first scan when power is applied to the PLC. It can be assigned to a contact like any other internal bit.

It is really useful for initializing and clearing logic to a known state when the PLC is turned on.