I'd check what type the script is actually trying to pass down, see what you put it, and if that's already truncated, or if the problem starts inside setValue.

value = -2147483648

print(value.__class__.__name__)

print(value)

pvs[0].setValue( value )

Then try passing different types like so:

from java.lang import Long, Double

value = Long.valueof(-2147483648 )

print(value.__class__.__name__)

print(value)

pvs[0].setValue( value )

.. or so:

value = Double.valueof(-2147483648 )

print(value.__class__.__name__)

print(value)

pvs[0].setValue( value )

Other question is the native type of your PV:

print(pvs[0].getValue().__class__.__name__)

Knowing the PV type and the actual data type passed in it'd be easier to figure out how the value is handled.

-Kay