OMRON C200H-MD215

24-VDC inputs; w/high-speed input; 0.1-A, 4-VDC outputs (useable as 128-point dynamic input unit) 16 input and 16 output pts

The first thing that must be assessed is the number of input and output points that the controlled system will require. This is done by identifying each device that is to send an input signal to the PC or which is to receive an output signal from the PC. Keep in mind that the number of I/O points available depends on the configuration of the PC. Refer to notes on the IR Area for details on I/O capacity and the allocation of I/O bits to I/O points.

Special I/O Units are allocated 1000 or 1600 words in the DM Area depending on the value set in word DM 6602 of the PC Setup. The DM 6602 setting determines whether the Special I/O Unit Data area is setup for 10 or 16 Units and whether the data is stored in read/write DM (DM 1000 to DM 2599) or read-only DM (DM 7000 to DM 8599).