Experimental Physics and
Industrial Control System

Douglas Henrique C. de Araújo <[email protected]> · Tue, 8 May 2018 16:27:26 -0300

Hi,

I installed the support mca7-7 to use a X-123SDD Detector using the MCA

Amptek Driver. The IOC starts correctly and the medm screen Amptek.adl

works perfectly, but I'm having problem to read a PV mca1.

In the medm screen mca.adl the graph don't show any data and return the

follow message: The requested data transfer is greater than available

memory or EPICS_CA_MAX_ARRAY_BYTES. If I use "caget" in this PV, I have

the same problem.

But, if I limit the number of elements of array until 4095 using: caget

-# 4095 mcaTest:mca1 for example, the pv return a correct value.

I put a very high value in variable

EPICS_CA_MAX_ARRAY_BYTES="999999999999", but it still didn't work.

Has anyone had this kind of problem? Any idea how to debug/solve this?

Best Regards

--
Douglas Henrique C. de Araujo
Software de Operação das Linhas de Luz
Laboratório Nacional de Luz Síncrotron – (LNLS)
Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)
[email protected] | +55 (19) 3512 1228
www.lnls.br

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System