Commreq Command Block Parameter Values - GE PACSystems RX7i Reference Manual

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

6.1.5 COMMREQ Command Block Parameter Values

The following table lists common parameter values that are used within the COMMREQ command blocks
for configuring a serial port. All values are in decimal.
Parameter
Protocol Selector
Data Rate
Parity
Flow Control
Bits Per Character
Stop Bits
Duplex Mode
Turnaround Delay (SNP only)
Timeout (SNP only)
204
Values
1 = SNP
3 = RTU
5 = Serial I/O
7 = Message Mode
0 = 300
1 = 600
2 = 1200
3 = 2400
4 = 4800
5 = 9600
6 = 19200
7 = 38400
8 = 57600
9 = 115200
0 = None
1 = Odd
2 = Even
0 = Hardware [RTS / CTS]
1 = None
2 = Software [XON / XOFF] (Serial I/O only)
0 = 7 bits
1 = 8 bits
0 = 1 stop bit
1 = 2 stop bits
0 = 2-wire
1 = 4-wire
2 = 4-wire transmitter always on
0 = none
1 = 10ms
2 = 100ms
3 = 500ms
0 = Long (8 sec)
1 = Medium (2 sec)
2 = Short (500ms)
3 = None (200ms)
PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222AD