Rockwell Automation 2708-DH5B2L_DH5B4L Attended Workstation - Manual (Page 37)

Chapter 4
Status Displays
4–7
C Count Of Records Lost From Host – This count is incremented
whenever a data record arrives from the network, before the
previous one was read by the A-B VBASIC program.
The lower line contains:
H Host Output Blocked Flag.
Data collected by the application is not being forwarded to the
network, because the Host device is not currently OPEN by an A-B
VBASIC program. Unless some action is taken to OPEN “Host”,
this data will be stranded. The condition can be cleared by an:
OPEN “Host”
KILL “Host”
KILL “QUE”
L Lost Data Flag
Data has been lost. This could be because the Host sent a record
and the workstation was not ready to receive it, or the Host is
sending faster than the workstation can process the data.
RC Record Count From Network – This is a count of the records which
have been transmitted to the Host from the A-B VBASIC program.
S Size Of Host Queue – This is the number of bytes currently in the
que for transmission to the Host. Data in this queue can be
prevented from going to the Host by:
1. A Host computer which has stopped polling (when the Master is in polled
mode).
2. A Host computer which has issued a XOFF, (any mode).
3. The device Host being closed. This condition is associated with the Host
Output Blocked Flag.
4. The workstation being offline.
Network Que Status
(Status Display 5) (cont’d)