The PCL511 programmable controller is an economical single axis step motor controller containing 2 Kbytes of non volitale stored programming space. The user can write the program and then have the PCL511 programmable controller autostart the program on power up. It provides flexible, independent control of step motors from computers or any machine controller with a serial port. It is also capable of stand-alone operation making it an embedded machine controller. The easy to use Windows software, SMC50WIN, can be used to directly control motion and to program the PCL511 programmable controller. The PCL511 programmable controller also has the ability for real time functions. A "Direct Mode" is used to directly control motion for Real Time Movements through serial communication. The PCL511 programmable controller has 18 commands which are easy-to-remember for direct movement of a step motor. The PCL511 programmable controller communicates via RS485 communication and up to 32 PCL511 programmable controllers can be networked from one communications port on your PC or PLC. The PCL511PC programmable controller is for single unit communication. It is a RS232 version of the PCL511 programmable controller. The PCL511PC programmable controller has 2 programmable open drain outputs and 4 TTL compatible inputs and can be powered with DC (5-24VDC) or AC (8-16VAC) voltages.