Re: Only integer value from CAEN VME protocol

[Christopher Wells Heidt <cheid001@ucr.edu>]

On Wed, May 27, 2015 at 5:13 PM, Eric Norum <wenorum@lbl.gov> wrote:

On May 27, 2015, at 8:49 AM, Christopher Wells Heidt <cheid001@ucr.edu> wrote:

I'm relatively new to epics and writing protocols, so please forgive 
me if I muddle up my terminology.

I'm trying to communicate with a CAEN VME8100 over a network.  I
would like to be able to read out the various channels and write
them into epics to be displayed in an edl panel. I have most of
this done, however, I am only reading out integer values.  So for
example, rather than reading the voltage as 5.23 V I am readding 5 V.
It appears that this is not a rounding error, instead I am only
reading the first digit of the output.

My protocol calling in the voltage looks something like:

​​

readVMON0 {
    out "$CMD:MON,CH:0,PAR:VMON";
    in  "#CMD:OK,VAL:%(PV_NAME.RVAL)f";

RVAL is an integer value.  Hence the complaint about not matching the ‘f’ format.

You should read into VAL.

-- 
Eric Norum
wenorum@lbl.gov

​

Switching VAL in for RVAL results in the PV reading 0.00.  Looks like the solution

is to remove the PV_NAME completely from the protocol.  It should read:

​

readVMON0 {
    out "$CMD:MON,CH:0,PAR:VMON";
    in  "#CMD:OK,VAL:%f";
}

-Chris​