Hi Aditya,
Your current code is structured to plot only one channel of data ("data1A") on your UI Axes. To plot multiple channels including trip and alarm lines, its important to use "hold on" and "hold off" to ensure that all the lines are plotted without erasing the previous ones. Here's a modified version of your code which demonstrates plotting for trip and alarm values.
i = 1;
data1A=[];
data1T=[];
data1Al=[];
while strcmp(app.Switch.Value, 'On')
% Generating random values for trip,alarm & process
tripM1A = 80 + rand(1)*20;
alarmM1A = 50 + rand(1)*10;
processM1A = rand(1)*100;
fullscaleM1A = 100;
% To plot data in UI Axes
data1A(i) = processM1A;
data1T(i) = tripM1A;
data1Al(i) = alarmM1A;
if i <= 60
plotRange = 1:i;
else
plotRange = (i-59):i;
end
% Ensuring previous plots are not erased
hold(app.UIAxes, 'on');
plot(app.UIAxes, plotRange, data1A(plotRange), 'LineWidth', 1.5, 'Color', 'b'); % Process data
plot(app.UIAxes, plotRange, data1T(plotRange), '--', 'LineWidth', 1.5, 'Color', 'r'); % Trip line
plot(app.UIAxes, plotRange, data1Al(plotRange), ':', 'LineWidth', 1.5, 'Color', 'g'); % Alarm line
% Hold off after plotting
hold(app.UIAxes, 'off');
title(app.UIAxes, 'Simulated Live Trend');
xlabel(app.UIAxes, 'Time in seconds', 'Color', 'k');
ylabel(app.UIAxes, 'Amplitude', 'Color', 'k');
ylim(app.UIAxes, [0 fullscaleM1A]);
grid(app.UIAxes, "on");
pause(0.1);
i = i + 1;
end
Please note I have used random data values since I do not have access to Modbus serial connection.Also the "hold" commands need the axes as a parameter. I have also attached the demo app containing the above implemention for your reference.For more information please refer to:
Hope this helps.
