Omron FH-3 Series Reference Manual page 864

7. The controller (master) sets the command code and command parameters to be executed during
measurement, and turns ON the measuring command execution signal (Flow Command Request signal).
(In the above example, this is the Set Unit Data command.)
8. The sensor controller (slave) turns ON the measuring command executing signal (Flow Command Busy
signal).
9. After setting the echo back of the command code executed during measurement, the response code, and
response data, the sensor controller turns ON the flow command completion signal (Flow Command
Completion signal), and turns OFF the flow command busy signal (Flow Command Busy signal).
10. The controller (master) turns OFF the flow command execution signal (Flow Command Request signal). If
the signal does not turn OFF within the set timeout time, the control flow advances directly to step 13.
11. The sensor controller (slave) turns OFF the measuring command completion signal (Flow Completion
Busy signal).
12. The controller (master) sets the command code and command parameters to be executed during
measurement, and turns ON the measuring command execution signal (Flow Command Request signal).
(In the above example, the wait state is cleared by Set Unit Data command.)
After this, steps 8 through 11 are performed.
13. When the processing unit finishes measurement processing, the sensor controller (slave) turns OFF the
measuring command standby signal (Flow Command Wait signal).
14. When execution of the measurement flow ends, the sensor controller (slave) turns OFF the Command
executing signal (Busy signal).
Flow Control in EtherNet/IP Communication
The basic timing chart when Control Flow Fieldbus is used with EtherNet/IP communication is shown below.
Example: The measurement command is executed by EtherNet/IP, and the Set Unit Data command is executed
by Flow Control Fieldbus processing during measurement.
ON
CMD-CODE
Command code
OFF
ON
CMD-PARAM
Command parameter
OFF
ON
CMD-EXE
Control command execution signal
OFF
ON
CMD-FLG
Command execution completion signal
OFF
ON
BUSY
Busy signal
OFF
ON
CMD-CODE
Command code
OFF
ON
RES-CODE
Response code
OFF
ON
RES-DATA
Response data
OFF
ON
CMD-XWAIT
Flow command wait signal
OFF
ON
CMD-XEXE
Flow command execution signal
OFF
CMD-XBUSY ON
Flow command busy signal
OFF
CMD-XFLG ON
Flow command completion signal
OFF
862
Control Flow Fieldbus
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FH/FZ5 Processing Item Function Reference Manual
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