One can from e.g. mec-daq do
grep_pv HVDD_DELTA
to get a list of PVs containing the string. Then e.g.
[mec-daq:~] mecopr> caget MEC:EPIX2M:01:Q0:HVDD_DELTA
MEC:EPIX2M:01:Q0:HVDD_DELTA 0.2
One can adjust this directly doing
caput MEC:EPIX2M:01:Q0:HVDD_DELTA 1