How do you pulse an IO point from a button?

AppStudio
1

I want to pulse a specific IO point when a button is pressed. Is there an example available that shows how to do this?

2

Go to the control panel on the pendant. There you will find programmable keys. Set up the key you want to use and select pulse and the DO to pulse.

3

As you’ve posted in the AppStudio section, I presume you mean using an AppStudio button, not a flex pendant physical button.

This functionality doesn’t appear to have been implemented for the TComponents.Button

It should be!
There should be on option to pulse a DO in “onClick” or toggle it on/off in onPointDown and onPointRelease so that you have a momentary switch operation.
At present we can only use a TComponents.Switch which is not momentary.

The best work around I can suggest is the create a procedure which in turn calls PulseDO
You can then use the “Execute procedure” function in the OnClick behaviour to call that procedure.

EDIT:
I’ve found that you can create a function in AppStudio ans set the DO in that.
There appears to be pulse functionality but I can’t find any documentation on the parameters.
I’m able to set a DO but unsure how to pulse it.

Something like this

async () => {
API.RWS.SIGNAL.setSignalValue(“doFr1ErrorQuit”, 1,{activePulse:1,passivePulse:0,pulses:10});
}
But this just sets the signal high. I don’t know if activPulse and passivePulse are supposed to be the state, the duration or what?

4

After finding the documentation I was able to pulse a signal by creating this function in the button “onClick” behavior

API.RWS.SIGNAL.setSignalValue(“doMySignal”, 1,{mode:“pulse”,activePulse:500,passivePulse:100,pulses:2});

setSignalValue(signalName, value, mode:, pulses:, activePulse:, passivePulse:, deviceType, networkType, attr)Modify signal’s value

Parameters:
Name Type Description
signalName string
value number
mode: string value
pulses: number Number of pulses.Pulses is required if mode is toggle/pulse.
activePulse: number Active pulse length, in ms
passivePulse: number Passive pulse length, in ms
deviceType string
networkType string
attr *
5

You can write code within the function, for example:

await API.RWS.SIGNAL.setSignalValue("ACOK", "", {mode: "pulse", passivePulse: 1000});

The current AppStudio has this interface, but there is a value attribute in the input parameters of this interface, which causes the pulse phenomenon to be somewhat abnormal. We are still working on solving this issue.