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Knauer pump RS232 communication

Knauer pump RS232 communication

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Functions for communicating with Knauer pumps via RS232.

knauerpumpobjreadminpress(serialObject, pumpHeadSize)
function minPress = knauerpumpobjreadminpress(serialObject, pumpHeadSize)
% KNAUERPUMPOBJREADMINPRESS returns the minimum pressure of Knauer pumps
% minPress = knauerpumpobjminpress(serialObject, pumpHeadSize) returns
% the minimum pressure of Knauer pumps connected to a valid serial object,
% as numbers.  If no pump head size is supplied, it will try and retrieve
% it, but if one is supplied, then will retrieve the minimum pressure set
% for that pump head size.

% checks the number of arguments
error(nargchk(1, 2, nargin))

% if a pump head size was supplied...
if nargin >= 2
    
    % check the input
    if ~isvalidknauerpumpheadsize(pumpHeadSize)
        
        % complain
        error('Must supply a valid pump head size - 10 or 50 [mL].')
    end

else
    
    % fetch it
    pumpHeadSize = knauerpumpobjreadpumpheadsizefast(serialObject);
end

% forms and writes command, adding the pump head size to the command
% because there are different values for this
minPress = knauerpumpobjcomm(serialObject, 'read', sprintf('PMIN%d?', pumpHeadSize));

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