The 1746-SMPTE Machine is a linear timecode (LTC) reader and generator for Allen Bradley SLC500 PLCs. It reads and generates SMPTE or EBU, and allows the PLC's ladder logic to ctronl and monitor the timecode. All standard frame rates are supported -- 23.976, 24, 25, 29.97, 30, and 30 drop. It also regenerates received SMPTE, dropout free, at its generate output.