Thursday, April 14, 2011

Connecting to the GE Fanuc PLC





The SOI may be linked to the GE Fanuc PLC via the programming port or one of the SNP capable ports in an optional GE Fanuc Communications Coprocessor Module (Contact Spectrum Controls for information on interfacing to the CMM using Modbus protocol.)

Series 90-30 Resistor Termination:
The port of PLC communication Receive Data differential pair must be terminated as indicated if the PLC is either the first or last drop on the SNP bus. This is always the case in a point-to-point configuration. However, PLCs may be connected as multiple drops. Do not link the resistor termination if the PLC is not the first or last drop on the SNP bus.

Shield Ground:
The shield has to be grounded at the first drop on the SNP bus. Connect the SOI communication port pins 5 and 9, if the SOI is the first drop on the bus. Link pins 1 and 7 on the PLC port, if the PLC is the first drop on the bus. Do not link the shield to ground on more than one unit (SOI or PLC) on the SNP bus.

SOI Resistor Termination:
The port of SOI communication Receive Data differential pair must be terminated as indicated if the SOI is either the first or last drop on the SNP bus. This is always the case in a configuration of point-to-point n. However, multiple PLCs may be linked to the SNP bus. Do not link the resistor termination if the SOI is not the first or last drop on the SNP bus. The SOI will only link to and communicate with a PLC regardless of how many are attached to the SNP bus.

Outputting Printer Forms (SOI-260 only)
You can use the SOI-260’s optional printer port to output Printer Forms to a printer or other serial device, such as a large ASCII display unit. Printer forms are created in the SOI-SPS programming software and may include production reports, alarm messages, instructional text, etc.


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