PLC-5 counter ACC values

[dogleg43 1]

This would be easy to figure out if I had a processor to test it on but I don't so I'll ask it here: With respect to a PLC-5/40E processor, can a counter's accumulated value ever exceed its' preset value? I'm looking at an existing program where the CTU has a preset of 3 but it is not reset until the ACC value is 1440. The counter is enabled once a minute. I'm trying to determine if the ACC will freeze at 3 or continue to increment. I know the done bit will energize at count 3 and stay on as long as the counter's ACC value is greater than or equal to the PRE value, but does the ACC value continue to increment even though the done bit is on? =========================== Thanks in advance for your responses.

[TechJunki 0]

YES

[Ken Moore 23]

The done bit is set when the .acc >= to .pre. However the counter will continue to count up to +32767, then the overflow bit .ov (bit 12) will be set and the .acc will roll over to -32768 and count up from there.