Yes, by using the update data member. The update member goes low when Lookout sends a request and goes (and remains) high when it receives a reply. Lots of ways to accomplish this, one example is:
text(now(Modbus1.update), "yyyy-mm-dd hh:mm")
so do I just create an expression using the example you gave me? Also, is there an easy way to manually poll a site? Thank you so much for your help.
Yes, an expression object would work. That would be good if you display it more than one place. I work mostly with Modbus objects but I think most if not all PLC objects behave the same. There are two polling writable data members (yellow fields) - pollrate and poll. pollrate is a time interval and poll is a discrete. A pushbutton (or any true condition) could be used to poll the device.