Omron SYSMAC FH Series User Manual page 126

2 Methods for Connecting and Communicating with External Devices
Additional Information
Saving All of the Measurement Results
If you output data from more than one Data Output Unit or for repeatedly measured output data
(e.g., for continuous measurements), the same Data Output Area will be overwritten.
To save all of the output data, adjust the Output period and Output time that are set in the
EtherCAT settings so that all of the output data is output and either receive all of the output data
by using the Result Notification signal or use handshaking control.
Handshaking lets you control data output by using the Result Notification signal turning ON as a
trigger for the data output timing and turning ON the Result Set Request to read the output da-
ta.
Each time that data is output (from the second output on), read the output data and move it to a
different part of I/O memory in the PLC.
For more information on handshaking, refer to Data Output Control with Handshaking on page
1 - 25.
You can compare the received number of output data and the number of measurements for
continuous measurements to check if all of the measurement results have been received.
Use the following method to check the number of measurements that was actually executed.
• Application Example
Set a calculation to count the number of measurements that are executed in the measure-
ment flow.
If you set something like [DO+1], each time a measurement is executed (each time the meas-
urement flow is executed), 1 will be added to DO, so the present value of DO will give you the
actual number of measurements.
2 - 64
FH/FHV Series Vision System User's manual for Communication Settings (Z342-E1)