See Oregon statute 107.434, which allows for make up parenting time. If a parent wrongfully withholds parenting time from the other parent, he or she could be deemed in contempt of the court order/judgment. Consider mediation to discuss modalities of contact and consequences for failure to abide by those modalities and the effect on the child.
Lake James Perriguey
There is no entitlement to so-called "make-up time." In the absence of specific language in a judgment or order, my position would be that the other party's right to "make-up time" simply does not exist.
As a practical matter, imagine the result if "make-up time" were allowed. A party would then be able to cancel scheduled parenting time and then show up to claim that a cumulative number of hours are now "owed," and may be "redeemed" at whim.
Respectfully, I would disagree that you should rely on contempt statutes (at ORS chapter 33) or ORS 107.434 and its provisions for expedited parenting time enforcement. I believe the appropriate remedy is modification.
If this issue is particularly troublesome, you may consider requesting an order modifying the parenting plan or clarifying its provisions. With these additional provisions you could have certainty.