Example Commreq Data Block For Configuring Serial I/O Protocol - Emerson PACSystems RX3i User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual
GFK-2222AK
Address + 19 Count of 100 µs units (0 = 3.5 character times)
Address + 20 not used
Address + 21 not used
Address + 22 Count of 10 ms units (range 0-255)
6.1.9 Example COMMREQ Data Block for Configuring Serial
I/O Protocol
Values
Address 12
Address + 1 0 = No Wait (WAIT mode not supported)
Address + 2 0008 = %R, register memory
Zero-based number that gives the address of the
Address + 3 COMMREQ status word (for example, a value of 99
gives an address of 100 for the status word)
Address + 4 not used
Address + 5 not used
Address + 6 FFF0H
Address + 7 5 = Serial I/O
Address + 8 not used
Address + 9 See COMMREQ Command Block Parameter Values.
Address + 10 0 = None, 1 = Odd, 2 = Even
Address + 11 0 = Hardware, 1 = None, 2 = Software
Address + 12 not used
73 The End-of-frame timeout and Receive-to-transmit delay values were added in Release 6.70 for the RX3i. They are discussed in the RTU Slave
Protocol section.
Serial I/O, SNP & RTU Protocols
End-of-frame timeout 73
Receive-to-transmit delay
Meaning
Data Block Length
WAIT/NOWAIT Flag
Status Word Pointer Memory
Type
Status Word Pointer Offset
Idle Timeout Value
Maximum Communication Time
Command Word (serial port
setup)
Protocol
Port Mode
Data Rate
Parity
Flow Control
Turnaround Delay
Section 6
October 2019
73
140