Experimental Physics and
Industrial Control System

Hello all.

I have an IOC that controls a mvc3 pressure gauge controller and retrieves its information. Between many PVs, the IOC has one that is responsible for taking the pressure values and one that is responsible for taking the units in which these pressures are expressed. Both use the stream module to send commands to the gauge and retrieve its response. I want to make the units end up automatically in the _Pressure.EGU field, but i dont know how.
I've tried:
record(mbbi, "$(BEAMLINE):$(DEVICE_NAME):PressureUnit") {
record(ai, "$(BEAMLINE):$(DEVICE_NAME):_Pressure") { }

But, although cagets to PressureUnit and to _Pressure do return their values, any call to $(BEAMLINE):$(DEVICE_NAME):_Pressure.EGU returns no actual value.

Are there any suggestions? I also tried FLNK or DOL but im not sure if im using them correctly. Thanks in advance.