BRONKHORST FlowDDE, Инструкция по эксплуатации

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BRONKHORST
®
Page 13 FlowDDE 9.17.067

Show date , time , msec. in main window of FlowDDE for each line.
Several advanced settings are available for troubleshooting purposes. Some applications do not support enabling
these settings. If you experience problems, disable these options:

Enable indirect polling : each FLOW ‐ BUS instrument keeps track of which parameters are changed by itself or
any other instrument. Parameter 81 shows the process in which a parameter is changed. When this option is
enabled, FlowDDE reads parameter 81 and polls the processes that are changed, so applications don’t need
to poll the parameters themselves. Note: this option slows down communication, as much more data is read
from the FLOW ‐ BUS.

Enable communication to unavailable parameters : DDE items are created for parameters above number 237
when the instrument does not contain the parameter. Close and open the communication after changing this
setting.

Ignore database restrictions : FlowDDE doesn’t generate errors based on the parameter information in its
database (see chapter 3 and 6), but reads and writes all command to the instrument. When the instrument
returns an error, that error is shown.
4.3.3 Simulation mode
In simulation mode only DDE ‐ communication with a virtual system stored in the database is possible. This can be used
when you don’t have a FLOW ‐ BUS system available. Parameter values can be read and write through DDE by your
client. Only controllers are simulated in this mode. Sending a setpoint will result in the same value for measure after a
few seconds.
Simulation start ‐ up:
-
Start ‐ up FLOWDDE.EXE, by clicking the icon
-
Select [Server][Simulate]
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Wait until message "Simulation=ON"
‐ Start ‐ up your client application
4.4 V
IEW AND EDIT PARAMETERS
All parameters any Bronkhorst® instrument can have are stored in the database of FlowDDE, which is used for correct
communication to the instruments. The contents of this database can be viewed and edited.
4.4.1 View parameters and values
The list of parameters and its properties as described in chapter 3 can be viewed by Info >> Parameter list . The
meaning of the values of several parameters, can be viewed by Info >> Parameter value list .
To view the parameters that a module (instrument) can have, open the View modules/parameters window from the
FLOW ‐ BUS menu. Select the correct module and click the View parameters button.