show multiple variables TM71

[otrotabi]

I would like to be able to quickly see several variables of a chiller on the display of a TM171, so I have defined a variable I call iDisplay which is type INT and has no units.

Then I define a local key to cycle through the different variables I need to see, basically input temperature, output temperature and low and high pressure.

In simulation, I am able to set SysLocalLeds[5] which is the thermometer icon and SysLocalLeds[3] which is the barometer icon and then something like this:

CASE usiDisplay OF

   0: iDisplay := iInputtTemp;
      SysLocalLeds[5] := 1;
      SysLocalLeds[3] := 0;

.  1: iDisplay := iOutputtTemp;
      SysLocalLeds[5] := 2;
      SysLocalLeds[3] := 0;

.  2: iDisplay := iLowPressure;
      SysLocalLeds[5] := 0;
      SysLocalLeds[3] := 1;

.  3: iDisplay := iHighPressure;
      SysLocalLeds[5] := 0;
      SysLocalLeds[3] := 2;

END_CASE;

This code simulates fine, but will not show the icons on the real target.

The manual has a Note that reads: NOTE: Some of the LEDs (for example 0, 1, 3, 5, and 7) cannot be used in the IEC application when BIOS menu is active.

So the question is: Is it possible to drive these icons this way ? Is the BIOS menu active ? 

On the other side, If I do set units for iDisplay for example °C the thermometer icon does show on display (but is misleading in case pressure is actually being shown).

An alternate approach would be being able to change the fundamental display state but I have not found anything saying this is possible.

[Bastian_Schmitz]

In your case you need to design your own UI via the FC "OverwriteLocalDisplay"

The input dp means deciamal point

[FedericoM · Accepted solution]

Hi,

try the attached example, it shows how to use OverwriteLocalDisplay(), main view is changed using up/down buttons

[otrotabi]

Thank you both and many thanks for the example. The comments helped me to understand how the overwriteLocalDisplay function works far better than the rather criptic help available.