Control Flow FieldbusFH/FZ5 Processing Item Function Reference Manual
861
5
Branch
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, an
d the Set Unit Data command is executed by Flow
Control Fieldbus processing during measurement.
1. The controller (master) turns ON the measur
eme
nt 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
th
e measurement flow, the sensor controller (slave) turns ON
the flow command wait signal (Flow Command Wait signal).
123 Unit judgement in timeout Set/Get
0: NG
1: OK
5000 Wait state clear command Set only
1: Clear the wait state
No. Data name Set/Get Data range
ON
OFF
ON
Command Parameter
Command Ready
Command ready signal
Response Data
Flow Command Wait
Flow command wait signal
Flow Command Request
Flow command execution signal
Flow Command Busy
Flow command busy signal
Flow Command Completion
Flow command completion signal
Command Code Echo Back
Response Code
Command Request
Command execution signal
Command Completion
Command completion signal
Busy
Busy signal
Command Code
Trigger Ack
Trigger acknowledgement signal
Trigger
Measurement trigger
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
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