Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 62)

Chapter 5
Configuration Menus
5–21
E–RS232 Block Transmit
This test and its counterpart, the RS232 Block Receive must be used only
with asynchronous modem lines. It is used for testing the Concentrator
Submaster connection ONLY.
This test causes a continuous stream of test records to be transmitted out the
RS-232 port of the workstation on which it is running.
The workstation at the other end of the Concentrator/Submaster connection
must be placed in RS232 Block Receive mode in order to verify that the
cabling between the workstations in this test is properly wired, connected and
is functioning.
When this test is enabled, the following appears on the display:
Tx=nnnnn ERRS=nnnnn –––contents of transmitted block–––––
The Tx indicates the number of blocks transmitted by this workstation,
ERRS indicates the number of errors encountered.
What follows is a cable verification procedure:
Place the workstation at the Concentrator’s location into RS232 Block
Transmit test mode (Diagnostic Test E).
Place the Submaster workstation attached to the Concentrator into RS232
Block Receive mode (Diagnostic Test D). The Submaster should show the
test block being received. If the block does not display the count of received
blocks, it is indicative of a cable fault. Correct any cable faults before
proceeding.
Place the Submaster workstation into RS232 Block Transmit mode. Now
place the Concentrator into RS232 Block Receive test mode. The
Concentrator workstation should show the test block being received. If the
count of received blocks is not displayed, it is indicative of a cable fault.
Correct any cable faults.
Pressing <EXIT> will exit the Block Transmit mode.
Note: This test must never be performed on a network operating in an actual
application. All other network activity must cease while this test is being run.
Menu 6: Diagnostics
Menu Parameters (cont’d)