How can a make or set the Y-axis of a processanalyst pen dynamically, based on an argument when I call the cicode function to be implemented

I believe you want the PutVerticalAxisSpan method in the Process Analyst. See this help page for more info and brief examples.

See also TN6374: https://softwaresupportsp.aveva.com/#/knowledgebase/details/000028548?lang=en_us

It has an example of how to add pens to process analyst and set a bunch of properties. It enables auto scale mode, but your could use PutVerticalAxisSpan in place of that.

Basically, you just need to get Process Analyst object handle, get the pane handle, get the pens group handle, create a pen within that group, then set the pen's properties:

hPA = ObjectByName(sPaObjectName);
hPane = GetPane(hPA, sPane);
hPens = _ObjectGetProperty(hPane, "Pens");
hPen = _ObjectCallMethod(hPens, "Create", nPenType, nNameMode);
_ObjectSetProperty(hPen, "DataPoint", sPen);
_ObjectSetProperty(hPen, "VerticalAxisAutoscale", TRUE);

Thanks for the quick response.

I'll try next week, but looking at this information and link I'm sure I'll make it work.

Hello Eric,

I took a look at the code and was a little bit overwhelmed.
I'm quit a noob in coding with aveva scada ci-code.

Maybe you can help me getting started.

This is what I am trying to chart:


6 pens, all in one pane, stacked.

In this example I added the pens manually but I want this to be set in the up-command line like I did in the normal trending code (see above)
I call the function from a button and in the input property of the button - up action - up-command like:

loadTrend_PA("TR_201_FluxHeight", S201_fh_Min, S201_fh_Max, "TR_201_LineSpeed", S201_ls_Min, S201_ls_Max,"TR_201_BeltSpeed", S201_bs_Min, S201_bs_Max, etc etc );

The max and min values for the Y-axis are the ' S201_* ' arguments where as the ' "TR_201_ *" ' arguments are the pens to trend.

What would be best?
Save this layout as a .pav file, load it, add the pens to the pane and adjust the Y-axis or start from scratch in, not loading a view ( *.pav file ), adding the pane, change to the correct background color, add pen, change the pencolor, adjust Y-axis etc etc.?

Much obliged for your assistance.

If you're not familiar with writing Cicode functions and working with ActiveX objects in Cicode, then it is a lot to learn at once. However, it is much easier to manually create the layout you want in the runtime and save it to a PAV file. You can then use the built-in command ProcessAnalystLoadFile() to re-open it from a button.

I think the question is: do you need to have variable scales for each of the trend pens? PlantSCADA is designed so that you set the variable min and max values in the variable tag properties. Or, if needed, you can set a different range in the trend tag properties. Also, in Process Analyst you can set pens to be auto-scaled according to the min/max values currently displayed.

If you really need variable setpoints, you would need to write a Cicode function to add the pens and set the scales and other properties. Or you could just load a PAV file with the pens preconfigured, then use a Cicode function to loop through all the currently-displayed pens and edit their scales.

Hello Eric, 

I would like to have less pages, that's why I want to make the PA charting as flexible, and dynamically as possible so I can call one page or function to do it all. That's why I want to use the arguments in the input property of the button.

Therefor I would like to have the y-axis dependant on the arguments for it. 

Maybe I am asking to much. 

It's the perfectionist in me.

The issue is that every product we make has a different setpoint and I would like to have this setpoint in the middle of the chart. 

If I do not do it like this I must make 50 pages for 50 recipes and that's not the way I think do do this. 

been a while since we wrote this, but check out the below, it auto-scales every 30 seconds while the graphic is active by setting the span to be PV + / - 5.  The intent is to show the PV with an upper and lower tolerable band, and then have an upper and lower (wider) alarm band

FUNCTION PAPageAutoScale(INT nSleepTime = 30) !Called while page active

PAAutoScaleEnable=1;

WHILE 1 DO

PAAutoScale("AN39", 1);
PAAutoScale("AN39", 2);
PAAutoScale("AN39", 3);
PAAutoScale("AN39", 4);
PAAutoScale("AN40", 1);
PAAutoScale("AN40", 2);
PAAutoScale("AN40", 3);

Sleep(nSleepTime);

END

END

FUNCTION PAAutoScale( STRING sPAName = "", INT nPane = 1)

OBJECT hPen1;
OBJECT hPen2;
OBJECT hPen3;
OBJECT hPen4;
OBJECT hPen5;
OBJECT hAnalyst;
OBJECT hPanes;
OBJECT hPane;
OBJECT hPens;
STRING sHiAlmMax;
STRING sLoAlmMin;
STRING sPVMax;
STRING sPVMin;
REAL rHiAlmMax;
REAL rLoAlmMin;
REAL rPVMax;
REAL rPVMin;
REAL rSpanHi;
REAL rSpanLo;

hAnalyst = ObjectByName(sPAName);
hPanes = _ObjectGetProperty(hAnalyst,"Panes");
hPane = _ObjectCallMethod(hPanes,"get_Item",nPane);
hPens = _ObjectGetProperty(hPane,"Pens");

hPen1 = _OBJECTCallMethod(hPens, "get_item", 1);
hPen2 = _OBJECTCallMethod(hPens, "get_item", 2);
hPen3 = _OBJECTCallMethod(hPens, "get_item", 3);
hPen4 = _OBJECTCallMethod(hPens, "get_item", 4);
hPen5 = _OBJECTCallMethod(hPens, "get_item", 5);

sHiAlmMax = _ObjectCallMethod(hPen1, "GetStatistic", "Maximum");
sPVMax = _ObjectCallMethod(hPen3, "GetStatistic", "Maximum");
sPVMin = _ObjectCallMethod(hPen3, "GetStatistic", "Minimum");
sLoAlmMin = _ObjectCallMethod(hPen5, "GetStatistic", "Minimum");

rHiAlmMax = StrToReal(sHiAlmMax);
rLoAlmMin = StrToReal(sLoAlmMin);
rPVMax = StrToReal(sPVMax);
rPVMin = StrToReal(sPVMin);

IF rHiAlmMax > rPVMax THEN
rSpanHi = rHiAlmMax + 5.0;
ELSE
rSpanHi = rPVMax + 5.0;
END

IF rLoAlmMin < rPVMin THEN
IF rLoAlmMin = 0 THEN //when LowDevAlm is deactivated by user
rSpanLo = 0;
ELSE
rSpanLo = rLoAlmMin - 5.0;
END
ELSE
rSpanLo = rPVMin - 5.0; //be sure that PV is visible
END

_OBJECTCallMethod(hPen1, "PutVerticalAxisSpan", rSpanLo, rSpanHi);
_OBJECTCallMethod(hPen2, "PutVerticalAxisSpan", rSpanLo, rSpanHi);
_OBJECTCallMethod(hPen3, "PutVerticalAxisSpan", rSpanLo, rSpanHi);
_OBJECTCallMethod(hPen4, "PutVerticalAxisSpan", rSpanLo, rSpanHi);
_OBJECTCallMethod(hPen5, "PutVerticalAxisSpan", rSpanLo, rSpanHi);

END

Hello Greg,

I tried to incorporate your code into my code and ended up with this:

FUNCTION
loadProcessAnalyst_advAS (STRING strFileTag)

	PageDisplay("1_Recorder_PA_print");
	SleepMS(20);
	ProcessAnalystLoadFile(strFileTag, 0, 483, "AN139");
	OBJECT hProcessAnalyst = ObjectByName("AN139");
	_ObjectCallMethod(hProcessAnalyst, "SynchroniseToNow");
	SleepMS(20);
// END

// FUNCTION PAPageAutoScale(INT nSleepTime = 10) !Called while page active

PAAutoScaleEnable=1;

WHILE 1 DO

PAAutoScale("AN139", 1);
Sleep(5);

END

END

FUNCTION PAAutoScale( STRING sPAName = "", INT nPane = 1)

OBJECT hPen1;
OBJECT hAnalyst;
OBJECT hPanes;
OBJECT hPane;
OBJECT hPens;
STRING sPVMax;
STRING sPVMin;
REAL rPVMax;
REAL rPVMin;
REAL rSpanHi;
REAL rSpanLo;

hAnalyst = ObjectByName(sPAName);
hPanes = _ObjectGetProperty(hAnalyst,"Panes");
hPane = _ObjectCallMethod(hPanes,"get_Item",nPane);
hPens = _ObjectGetProperty(hPane,"Pens");

hPen1 = _OBJECTCallMethod(hPens, "get_item", 1);

sPVMax = _ObjectCallMethod(hPen1, "GetStatistic", "Maximum");
sPVMin = _ObjectCallMethod(hPen1, "GetStatistic", "Minimum");

rPVMax = StrToReal(sPVMax);
rPVMin = StrToReal(sPVMin);

rSpanHi = rPVMax + 5.0;
rSpanLo = rPVMin - 5.0; 

_OBJECTCallMethod(hPen1, "PutVerticalAxisSpan", rSpanLo, rSpanHi);

END

But during compilation I get:

referring to:

Any idea what I am doing wrong?

PAAutoScaleEnable is likely to be either a local or global variable (or tag) designed to turn autoscaling on or off for their project (e.g. attached to a button or something on the page).

The function Greg gave you doesn't actually use it, so you can delete it.

Hello Bradley,

After removing PAAutoScaleEnable=1; it compiled correctly but the trend will not autoscale.
I am missing some command to execute the 2nd function every 5 seconds, I think.

The intension should be that when this page is visible (loaded/displayed) every 5 seconds the trend Y axis is updated based on the max and min values