Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 754)

Section 15A
Troubleshooting The Control
15A-44
Figure 15A.19
Serial I/O Diagnostics Screen
START REPEAT STOP
XMIT
SINGLE
XMIT
SERIAL I/O SETUP MODE
SERIAL PORT: A
DEVICE: ALLEN-BRADLEY 1770-SB
PORT TYPE RS232C PIN INP OUT
BAUD RATE: 1200
PROTOCOL: LEVEL 2 4 RTS
PARITY: NONE 5 CTS
STOP BITS: 1 6 DSR
The serial I/O parameters shown will vary for each peripheral device. If
the parameters displayed for a specific peripheral device do not match the
default parameters for that device, the message “PARAMETERS DO NOT
MATCH THE DEFAULTS” are displayed on the screen.
If the protocol parameter is set to LEVEL_1, RAW, or DF1, pressing the
{START} softkey will highlight the CTS output signal. Pressing the
{STOP} softkey changes the CTS output signal back to normal display.
If the protocol parameter is set to LEVEL_2 and the control is receiving
data, pressing the {START} softkey displays DC1 on the screen. Pressing
the {STOP} softkey displays DC3.
If the protocol parameter is set to LEVEL_2 and the control is transmitting
data, pressing the {START} softkey displays DC2 on the screen. Pressing
the {STOP} softkey displays DC4.
Important: For more information on protocol, refer to page 8-9.
When the {REPEAT XMIT} softkey is pressed, the control highlights this
softkey and transmits a string of characters that corresponds to last key
pressed on the operator panel keyboard. Pressing any of the softkeys stops
transmission.