Question iec 104 digital output point

[Johnny07]

Hello,

I have an IEC 104 digital output point. When I control this point from GeoSCADA and set it to '1', the point is successfully updated both in GeoSCADA and in the PLC—everything works as expected.

However, if the point is changed to '0' directly in the PLC (for any reason), will the digital output point in GeoSCADA also be updated accordingly, even though it's defined as a digital output point?

[sbeadle · Accepted solution]

Hi Johnny,

not sure why this didn't get some kind of answer. Generally, most drivers supporting controls will enable their value to be read from the device, so when you send a 'Control to 1', you get a 'Value is 1' coming back. This does depend on device functionality, which we're not in (erm) control of.

Steve

[Johnny07]

Hello Steve, thanks for your answer, i will discuss this with our PLC programmer. i think it has something to do with the 104 type used for this point.