Voltage Regulator for Multiple Transformers?

[pg18]

I'm trying to setup a voltage regulator for two transformers that are connected in parallel. I'm trying to control the voltage on the secondary of these transformers (note m0, shown below).

These are the parameters I'm aiming for:

~ vreg=248
~ band=4.96
~ delay=0.02
~ ptratio=60
~ tapnum=0

How would I be able to implement this for the two transformers defined here? I have tried defining two RegControl objects, one for each transformer, but end up with very odd values when doing this.

new transformer.sub1 Phases=3 Windings=2 
~ wdg=1 bus=sourcebus conn=delta kv=120 kva=47000
~ wdg=2 bus=m0 conn=wye kv=25 kva=47000
~ %Noloadloss=3
~ %Loadloss=0.6
~ XHL=18.5
~ numtaps=32
~ mintap=0.9
~ maxtap=1.1

new transformer.sub2 Phases=3 Windings=2 
~ wdg=1 bus=sourcebus conn=delta kv=120 kva=47000
~ wdg=2 bus=m0 conn=wye kv=25 kva=47000
~ %Noloadloss=3
~ %Loadloss=0.6
~ XHL=18.5
~ numtaps=32
~ mintap=0.9
~ maxtap=1.1

Thank you!

[Roger Dugan]

Keep both RegControl devices the same. OpenDSS should keep them synched up then.

Try this script:

Clear

New Circuit.TestReg
~ BasekV=120 pu=1.08  MVASC3=3000  MVASC1=2700

new transformer.sub1 Phases=3 Windings=2 
~ wdg=1 bus=sourcebus conn=delta kv=120 kva=47000
~ wdg=2 bus=m0 conn=wye kv=25 kva=47000
~ %Noloadloss=3
~ %Loadloss=0.6
~ XHL=18.5
~ numtaps=32
~ mintap=0.9
~ maxtap=1.1

new transformer.sub2 Phases=3 Windings=2 
~ wdg=1 bus=sourcebus conn=delta kv=120 kva=47000
~ wdg=2 bus=m0 conn=wye kv=25 kva=47000
~ %Noloadloss=3
~ %Loadloss=0.6
~ XHL=18.5
~ numtaps=32
~ mintap=0.9
~ maxtap=1.1

New RegControl.Reg1 Transformer=sub1 winding=2
~ vreg=248
~ band=4.96
! looks weird ~ delay=0.02
~ ptratio=60

New RegControl.Reg2 Transformer=sub2 winding=2
~ vreg=248
~ band=4.96
! looks weird ~ delay=0.02
~ ptratio=60

New Load.m0  Bus1=m0 kW=30000 PF=.98

Set voltagebases = [120 25]
CalcVoltageBases

Solve
Show V ln nodes

[pg18]

In what situation, if any, would OpenDSS not keep them synced together?

Is this something I should be validating (checking tap position) after every itiration?