sequencer is an overated move instruction
I am not familiar with the Omron, but wouldn't this work for any PLC.
What ever fires your Sequencer Ouput instruction, have it pulse an instruction that adds one to itself . in the Omron. Depending on the value of the counter word, move the proper bit sequence (word value) into the output word. Make sure to set the counter word back to its starting value when you exceed the max count value.
clear as mud?