Timing Chart (Control Flow Fieldbus Flow) - Omron FH-3 Series Reference Manual

No. Data name
123 Unit judgement in timeout
5000 Wait state clear command

Timing Chart (Control Flow Fieldbus Flow)

To execute a command using a Control Flow Fieldbus processing item during a measurement flow, control the
sensor controller paying attention to the timing of the signals from the external device. Refer to the timing chart
below.
Flow Control in EtherCAT Communication
The basic timing chart when Control Flow Fieldbus is used with EtherCAT communication is shown below.
EtherCAT communication can only be used on the FH.
Example: A measurement trigger is input by EtherCAT, and the Set Unit Data command is executed by Flow
Control Fieldbus processing during measurement.
ON
Trigger
Measurement trigger
OFF
ON
Trigger Ack
Trigger acknowledgement signal
OFF
ON
Command Code
OFF
ON
Command Parameter
OFF
ON
Command Request
Command execution signal
OFF
ON
Command Completion
Command completion signal
OFF
ON
Command Ready
Command ready signal
OFF
ON
Busy
Busy signal
OFF
ON
Command Code Echo Back
OFF
ON
Response Code
OFF
ON
Response Data
OFF
ON
Flow Command Wait
Flow command wait signal
OFF
ON
Flow Command Request
Flow command execution signal
OFF
ON
Flow Command Busy
Flow command busy signal
OFF
ON
Flow Command Completion
Flow command completion signal
OFF
1
1. The controller (master) turns ON the measurement trigger signal (Trigger signal).
2. The sensor controller (slave) turns ON the trigger acknowledge signal (Trigger Ack signal).
3. The controller (slave) turns OFF the measurement trigger signal (Trigger signal).
4. The sensor controller (slave) turns OFF the trigger acknowledge signal (Trigger Ack signal).
5. The sensor controller (slave) turns ON the processing signal (Busy signal).
6. When the processing unit is executed inside the measurement flow, the sensor controller (slave) turns ON
the flow command wait signal (Flow Command Wait signal).
FH/FZ5 Processing Item Function Reference Manual
Set/Get
Set/Get
Set only
2 3 4 5 6 7 8
0: NG
1: OK
1: Clear the wait state
9 10 11 12
Data range
13 14
Control Flow Fieldbus
5
861