I'm not familiar with the F1 (what's a '660 counter'?), but I'll take a stab at a possible workaround...
Assuming that when the counter reaches the preset it inhibits counting down, just prevent the counter from reaching it's preset!
Set the preset higher than it's currently set to, then inhibit the 'count up' input when the current value reaches the 'high limit'
COUNTER
| INC INHIBIT +------+
|----] [-------]/[--------| UP |
| | |
| DEC | |
|----] [------------------| DN |
| +------+
| COUNTER
| VALUE > Knnnn
|-------] [----------------(INHIBIT)
.
For that matter, why use a counter? Just increment/decrement a variable. Better yet, post what you have so far. It will make it a lot easier to offer a suggestion.
beerchug
-Eric