M172 HMI message pop-up

[otrotabi]

I am trying to make alarms visible on a "pop-up" screen in M172 HMI. I do it by using a "Message" instead of a regular page.  An example code is available here .

I define a couple of status variables to do this and use them in a GlobalOnTimer procedure. ActiveAlarm is ON whenever at least one alarm is active, and AlarmIgnore is used to tell the PLC to stop sending alarms for some time:

//ActiveAlarm : at least one alarm is active


uiret:=Video_GetParam(0,Addr_ActiveAlarm,0,?ActiveAlarm,tyBool); // See if alarms are active

//AlarmIgnore : tell the PLC not to cycle alarms
uiret:=Video_GetParam(0,Addr_AlarmIgnore,0,?IgnoreAlarm,tyBool); // See if alarms are acknowledged

//Alarm Pop Up screen

IF ActiveAlarm THEN
	IF NOT AcknowledgeAlarm THEN 
		msg_id_opened:=1; //Make sure what page number is loaded
		uiret:=Video_SendEvent(kWM_MSG,msg_id_opened);  
	END_IF;
ELSE	
	IF HMI_usiPosition = 1 THEN
		msg_id_opened:=0; 
		uiret:=Video_SendEvent(kWM_KEY,kKEY_VK_F3); //Close pop up
		//Define global virtual key VK_F3 as close
	END_IF;	
	AcknowledgeAlarm := FALSE;
END_IF;	

There´s a couple of minor corrections needed but the code works both in simulation and on a physical target (TM172PDG18R), as long as I connect to the target and "Download all" the project.

However, if I need to correct the HMI code or screens, I can connect to the PLC but when I finish the process of downloading the new HMI code, PLC hangs and I get either WDT3 or HMI can not be loaded error when the PLC starts. 

So, the problem lies on the GlobalOnTimer procedure. If I remove the Video_SendEvent function and open the screen with a button instead, there are no issues.

Any comments on how to improve this will be welcome.

[Bastian_Schmitz]

 

Hi,

So far I remember exactly for this purpose is the Target function sysHMI_Message in Programming integrated. 

[otrotabi]

Thanks Bastian for the tip.

Do you remember if there´s anyway to close the popup from programming ? I tried setting the input to a not valid value but it does not close it. Or do I need to write an OnTimer procedure in the message screen ?

[FedericoM]

Hi,

the limit of sysHmi_Message() is that it works only on local display and not on the remote TM17xDGRP.

The reason of the watchdog I think is that the code tries to open infinite time the popup.

I haven't tested it, but try to modify the code more or less in this way:

GLOBAL TIMER SCRIPT: 

//ActiveAlarm : at least one alarm is active

uiret:=Video_GetParam(0,Addr_ActiveAlarm,0,?ActiveAlarm,tyBool); // See if alarms are active

//AlarmIgnore : tell the PLC not to cycle alarms

uiret:=Video_GetParam(0,Addr_AlarmIgnore,0,?IgnoreAlarm,tyBool); // See if alarms are acknowledged

//Alarm Pop Up screen

IF ActiveAlarm THEN

        IF NOT AcknowledgeAlarm AND NOT(xMsg1Open) THEN

                 msg_id_opened:=1; //Make sure what page number is loaded

                 xMsg1Open:=TRUE;

                 uiret:=Video_SendEvent(kWM_MSG,msg_id_opened); 

        END_IF;

ELSE   

        AcknowledgeAlarm := FALSE;

END_IF;

ONTIMER SCRIPT of the Message: 

IF NOT(ActiveAlarm) THEN

        xMsg1Open:=FALSE;

         uiret:=Video_SendEvent(kWM_KEY,kKEY_VK_F3); //Close pop up

END_IF;      

Close button of the Message must call the same script linked to OnTimer