Access to the OPSUP bit in the alarm field

I was thinking of using the suppress check mark on the detail faceplate as an access to a temporary bypass for a low flow interlock. When it is checked, I would like to display that there is a bypass in use. But I don't see how to gain access to this part of the Alarm word. It would look like it might be something like alarm(1).F_OPSUP, but that doesn't work in a calc block.

Is this something that is not accessible? 

Thanks in advance...Gary