Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 56)

Chapter 5
Configuration Menus
5–15
6–Comm Receive Test
When Enter is pressed while 6–Comm Receive Test is showing on the
display, the following prompt appears on the display:
DTR: ON CD: ON
Pressing will turn on DTR.
Pressing < - (LEFT ARROW) will turn off DTR.
For any communications to occur, Data Carrier Detect (DCD) must be high.
If DCD is high, and another workstation has been set to run Diagnostic
5–Comm Transmit Test, the following test pattern will be received through
the communications port (single 80 column line):
0123456789 ––lazy dog.–– 9876543210 []
While operating this test, characters received will be echoed to the top line of
the display. The bottom line displays:
DTR: ON CD: ON
Pressing will terminate the test and display 6–Comm Receive Test.
Note: This test will not operate on a workstation which is currently set up as
a Submaster, Alternate Submaster or Concentrator.
7–Comm Loop Test
When Enter is pressed while 7–Comm Loop Test is showing on the display,
the following prompt appears on the display:
DTR: ON CD: ON
Pressing will turn on DTR.
Pressing < - (LEFT ARROW) will turn off DTR.
The Comm Loopback test is used to verify proper operation of the
communications line. The same pattern used by the transmit test is sent, and
the test expects to receive this pattern from the comm line. To use this test, a
LOOPBACK PLUG must be made or acquired.
Menu 6: Diagnostics
Menu Parameters (cont’d)