Switch polarity appears to be inverted...?

[petesmart]

Hi all,

Has any one come across an issue with v5 with the active state being inverted,ie active low is active high and vice versa..have not had a chance to investigate to any depth yet. Had to complete a project that I was having difficulty with the switch inputs not working as they should ie +ve for active.. Switched to active low and the swicth behaved as active high....confirmed with switch eblock

All the best

Pete

[JonnyW]

Hi. We haven't seen any unusual behavior like this here. Could you post any sample or tell us what steps to reproduce this (and your setup) and we'll take a look.

Cheers,

Jonny

[petesmart]

Thanks Jonny,

The config is a ECIO40p with a MM switch eblock. Using read switch macro, read state. The flowchart simulated as it should, however when compiled the active state of the switch is inverted, ie active high was actually active low. Checked the pin and the pulldown resistor on the eblock was as expected.

What I was expecting was a logic one when the switch is closed..ie 5 volts on the input pin...instead the chip was expecting an active low state, which when using the eblock meant that the switch was always on via the pulldown resistor...

Changing the active state in the switch config window to active low sorted the issue

This of course could be me doing something stupid, it's happened before..or am I going mad?

All the best

Pete