No, there is no limit, just set EPICS_CA_MAX_ARRRAY_BYTES. We are sending 16MB images over CA with no problem.
Amd 16K of doubles is not 1K values, it is 2K. A double takes 8 bytes on every architecture I know of.
Mark
________________________________
From: [email protected] on behalf of [email protected]
Sent: Tue 5/25/2010 4:15 PM
To: Till Straumann
Cc: EPICS Tech-Talk
Subject: Re: labCA and EPICS_CA_MAX_ARRAY_BYTES
Is there still a limit on the length of arrays?
I understand that the client and ioc needs to be configured with
EPICS_CA_MAX_ARRAY_BYTES
Note that the number of bytes is not the numbers of values.
16K of double variables is only 1K values....
is this still a limitation in 3.14.11?
--
E
On 10:27 Tue 25 May , Till Straumann wrote:
> On 05/25/2010 09:55 AM, John Dobbins wrote:
>> 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.
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