Timing Chart For Plc Link Communications - Omron FQ2-S/CH Series User Manual

Timing Chart for PLC Link Communications

 Command/Response Communications
ON
Command code
OFF
ON
Command parameters
OFF
ON
Control Command
Execution Bit (EXE)
OFF
signal
ON
Command code
OFF
ON
Command
Execution Active
(BUSY) signal
OFF
ON
Trigger Input Ready
(READY) signal
OFF
ON
Response code
OFF
ON
Response data
OFF
ON
Control Command
Completed (FLG)
signal OFF
FQ2-S/CH User's Manual
for Communications Settings
Control Command
Execution Active
(1) (2) (3)
(4)
Controlling Operation and Outputting Data with PLC Link Communications
1. The command code and command
parameters are set from the PLC.
2.The PLC turns ON the Control
Command Execution Bit (EXE) signal.
The execution command is sent to the
Vision Sensor.
3. When the Vision Sensor receives the
execution command, the Command
Execution Active (BUSY) signal turns
ON, the Trigger Input Ready
(READY) signal turns OFF, and the
command is executed.
*
4. The command code, response code,
and response data are set when the
Vision Sensor completes execution of
the command.
5. The Control Command Completed
(FLG) signal turns ON.
6. When the PLC detects that the Control
Command Completed (FLG) signal is
ON, it turns OFF the Control Command
Execution Bit (EXE) signal.
7. When the Vision Sensor detects that
the Control Command Execution Bit
(EXE) signal is OFF, it turns OFF the
Control Command Completed (FLG)
signal and the Command Execution
Active (BUSY) signal, and turns ON the
Trigger Input Ready (READY) signal.
* If the PLC does not turn OFF the
Control Command Execution Bit (EXE)
signal within the time that is set for the
retry interval in the PLC Link settings,
the Control Command Completed
(FLG) signal and Command Execution
Active (BUSY) signal will be forced
OFF.
(5) (6) (7)
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