Experimental Physics and
Industrial Control System

Is it possible to use labCA to retrieve arrays larger than 16K?

Yes - I routinely use that.
You have to make sure EPICS_CA_MAX_ARRAY_BYTES is set
in the environment *before* you start matlab or scilab (RTM).

On the IOC, too, you need EPICS_CA_MAX_ARRAY_BYTES but
since you tested with caget that's obviously set up correctly.

I have EPICS_CA_MAX_ARRAY_BYTES set to a large number and verified that caget will retrieve a large array but labCA 3.1 returns an error.

data= lcaGet('IBLEMS01_data', 120000);

Initializing labCA Release '$Name: labca_3_1 $'...
Author: Till Straumann <[email protected]>
??? Error using ==> lcaGet
multi_ezca_get - ezcaGetWithStatus(): get_callback() : The requested data transfer is greater than



John Dobbins

Cornell University
Laboratory for Elementary-Particle Physics

Replies:

Re: labCA and EPICS_CA_MAX_ARRAY_BYTES emmanuel_mayssat

References:

labCA and EPICS_CA_MAX_ARRAY_BYTES John Dobbins

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