Nh1971 (Customer) asked a question.
This is mostly a vent. I am using Do-More designer in simulation mode. I am learning, but I do have some experience. Basically I have Do-More and I am using modbus to use it with Node-Red and some of Weintek's HMI software. Honestly, this is all to make a virtual simulator so I can continue my learning. Good old Rockwell clamped down on their simulation software.
In any case.... ONDTMR in Do-More...has all of these useful fields such as Reset. However I can not find a way to use that field---as the error tells me, that is "Read Only". I have tried SET for it. I have tried MOV to put a 1 into it. I have tried RSET T0. What I want to do is have a counter count to a preset time. Then stop. Then reset. The conditional to the left of the timer can turn off and the timer keeps on going.
This is the simplest of tasks. This is the "Hello World" of the ladder logic realm. (I've forced myself to get past the fact that you cant use the status of an actual output as a conditional and other guardrails, but I think I would quit the field if I had to use Do-More all the time.) DoMore? Is that because you have to do more to do anything? Sorry I couldn't resist.
That is a STATUS bit (hence why it is readonly), not a command bit. To reset an ONDTMR, just remove power flow into the box, although it's not really a timer with enable/reset like you are thinking. That's probably why you are having problems with it.
I recommend you use a regular TMR and them maybe try the TMRA behavior. If you look at the timing diagrams in the common timer editor, determine which instruction behavior is the one you are wanting. I bet you want TMR or TMRA for "hello, world" behavior.