Serial I/O Commreq Commands - GE PACSystems RX7i Reference Manual

Chapter 6. Serial I/O, SNP & RTU Protocols

6.2.4 Serial I/O COMMREQ Commands

The following COMMREQs are used to implement Serial I/O:
■ Local COMMREQs - do not receive or transmit data through the serial port.
Initialize Port (4300)

Set Up Input Buffer (4301)

Flush Input buffer (4302)

Read port status (4303)

Write port control (4304)

Cancel Operation (4399)

■ Remote COMMREQs - receive and/or transmit data through the serial port.
Autodial (4400)

Write bytes (4401)

Read bytes (4402)

Read String (4403)

210 PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222AD