Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 60)

Chapter 5
Configuration Menus
5–19
B–RS485 Block Receive
This RS485 Block Receive Test is used in conjunction with diagnostic test
C–RS485 Block Transmit to test the cabling integrity of the network.
When this test is enabled, the following appears on the display:
Rx=nnnnn ERRS=nnnnn –––contents of a block–––––
The Rx indicates the number of blocks received by this workstation, the
ERRS indicates the number of errors encountered.
If the Rx count does not change on the display, then the cable is probably
not connected, is shorted or has a break.
If the Rx Error count is more than 1% of the received blocks (Rx count), then
there are cabling problems present which must be corrected for proper
operation of the network. See Chapter 2. This test is terminated by pressing
<EXIT>.
C–RS485 Block Transmit
This RS485 Block Transmit Test is used in conjunction with diagnostic test
B–RS485 Block Receive to test the cabling integrity of the network. It causes
a continuous stream of test records to be transmitted out the RS-485 port of
the workstation on which it is running.
Other workstations may be placed in RS485 Block Receive mode in order to
verify that the cabling between the workstations in test are properly wired,
connected and are 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, the
ERRS indicates the number of ERRS encountered.
Menu 6: Diagnostics
Menu Parameters (cont’d)