Yokogawa PC-Based MX100 - Manual (Page 244)

3-9
IM MX190-01E
MX100 - Visual C
3
Flow of the Process
The flow chart shown below omits the declaration section.
Connect
Start the FIFO
Get the time
information
Disconnect
END
START
Get the data range
that can be retrieved
Declare the retrieval
of the measured data
Last data
number?
Last data
number?
Get the
measured data
Stop the FIFO
closeMX
getTimeDataMX
startFIFOMX
getFIFODataNoMX
openMX
talkFIFODataMX
getChDataMX
stopFIFOMX
Communication Process
First, make a connection. After making the connection, the functions become
available. As a termination procedure, disconnect the communication.
Note
• If there is no access for approximately three minutes, the MX100 drops the
connection. Drop the connection if you are not accessing the MX100 for an extended
time. Make the connection only when necessary.
• If you want to keep the connection open, run status retrieval.
Communication Connection
openMX("192.168.1.12" &rc)
The IP address of the MX100 is specified.
This statement implicitly specifies the communication constant for the
communication port number of the MX100.
FIFO Start
startFIFOMX(comm)
Starts the FIFO.
Retrieval of Data Range
getFIFODataNoMX(comm, 0, &startNo, &endNo)
Retrieves the range from the next data following the data retrieved last to the most
recent data of the specified FIFO number using data numbers.
3.2 Program - MX100/Visual C -