Chapter
4
SerialCommunications
Serial communications with the State Logic Processor (SLP) is provided through one of the two serial ports. Each of these ports can send and receive serial data independent from the other. Port 1 is an
ECLiPS and OnTOP must communicate with the SLP through the programming port. Either port can be the programming port, but port 1 is the default programming port. When ECLiPS or OnTOP is not connected to the SLP, the programming port can be used to communicate with some other serial device. To properly set the programming port to communicate with another device, exit ECLiPS or OnTOP normally before disconnect- ing from the SLP.
Either of these ports may also be a CCM port. The CCM port uses the GE Fanuc CCM2 protocol for all communications. This protocol is used for connecting the SLP with a host computer which collects data and changes data in the SLP. Typical CCM uses are con- necting to a graphical user interface program such as CIMPLICITYr or for custom host interaction with the SLP.
The SLP is always a slave to the host, i.e., all communications are initiated by the host computer. The SLP may be one of several devices on a CCM network. The CCM port is always the port that is not designated as the programming port. The CCM port is a nor- mal
rCIMPLICITY is a registered trademark of GE Fanuc Automation North America, Inc.