About Obtaining Flow Data - Omron ZS Series Communication Command Reference

Section 4
How to Obtain Flow Data

About Obtaining Flow Data

About Obtaining Flow Data

What is flow data?
In the ZS series, a high-speed sampling measurement at a maximum of 110
microseconds is implemented. To handle the measurement data with external
devices, it is necessary to obtain a large volume of data. The ZS series provides a
system to handle measurement data as a bunch of any number of data items and to
obtain data in units of bunches. A bunch of data is called flow data.
Process to obtain flow data
A data items bunch is transmitted as flow data output upon full data accumulation
specified by buffer size (a maximum of 1000 data items) if a flow data obtaining
command has been received. A data recipient (such as a personal computer) must
issue a command in advance of full measurement data accumulation specified by
buffer size to the ZS controller.
Commands and data items are exchanged between a data recipient and the ZS
controller as shown in the flow chart below:
Command issuance
Command issuance
Command issuance
Data reception
Command issuance
The previous data is overwritten upon full measurement data accumulation specified
by buffer size in the ZS controller if no command has been received.
In this case, an error flag appears as buffer overflow occurs. A data recipient (such as
a personal computer) must confirm whether or not a command is properly issued in
time by observing this flag.
4-2 ZS Series
CompoWay/F Communication Command Reference
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Specified buffer size data
obtaining at once
Data reception
Specified buffer size data
obtaining at once
Data reception
Specified buffer size data
obtaining at once
Controller
Data is being
accumulated
Output of result
Data is being
accumulated
Output of result
Data is being
accumulated
Output of result
Data is being
accumulated