Specifications

PA/4000 User’s Manual
Appendix C, PA/4000 Remote I/O
Page 7
Bank S3 Switch 3
Bit 1 Bit 2 Baud Rate
ON* ON* 19200 bits/sec
OFF ON 9600 bits/sec
ON OFF 2400 bits/sec
OFF OFF 1200 bits/sec
Bit 3 Stop Bits
ON* 1 Stop bit
OFF 2 Stop bits
Bit 4 Data Bits
ON 7 data bits
OFF* 8 data bits
Bit 5 CTS/RTS
ON CTS/RTS handshaking enabled
OFF* CTS/RTS handshaking disabled
Bits 6-8 Not Used
RIO Status LEDs
The RIO board has seven LEDs that report the status of communications between the
PLC and the RIO board. Use the listing below to monitor their signals and identify any
irregularities.
Red LED Indicates a reset. It flashes when a reset occurs and goes out when
reset is complete. Normal state is off.
Green LEDs 1 & 4 Signals a handshake. If enabled, they flash during a handshake. If
disabled, they remain off. Normal state is off.
Green LEDs 2 & 5 Signals communication to the PLC from the PA/4000. It flashes
during send or receive. LED 5 blinks when communication occurs
between the RIO board and the controller.
Green LED 3 Indicates when power is on.
Green LED 5 Communication state.
Green LED 6 Indicates the state of the PLC- it stays on steadily when the RIO is in
RUN mode and flashes when it is in the PROGRAM mode.
During normal operation, LED 3 and 6 will be on. LED 3 will change to a flash when
the system goes into programming mode.