ACS-880. Function Block Programming - Need a Bi-Directional FlipFlop

Hello, Geof
Even though I put this question in the general list, I'm directing it to you because you are probably the closest to my time zone.

Been doing lots of function block programming in the Adaptive Programming feature of an ACS-880 drive. (I do not have any advanced firmware version).

But now I’m stuck. How can I lock the output of a “Greater Than” block when it becomes true or false? Using a SR block (connected to the output of the > block) with the Reset fixed at zero works if the input is initially 1. Thus the output stays at 1. But if the initial input is zero, and then later becomes 1, then the output becomes 1. In this case, I want the output to stay at zero.

The only available function blocks I have are found in the ABB document: Application Guide, Adaptive Programming, ABB, 3AXD50000028574

Any suggestions?

Many Thanks!