Some Johnson control systems generate, deliberately long instance numbers that the field techs can’t change.
I can’t interface with two RTUs on a current project because of the long instance numbers.
The workaround that tech support offers is to purchase their hardware HMI and rework shorter instance numbers from the HMI and interface with the HMI?
Bummer, but the big corporation squeezed out the smaller competitors because we can’t do long instance numbers.