Timing Chart For Plc Link Communications - Omron FQ2-S4 User Manual

Timing Chart For PLC Link Communications

● Command/Response Communications
Command code
Command parameters
Control Command
Execution Bit (EXE)
signal
Command code
Command
Execution Active
(BUSY) signal
READY signal
Response code
Response data
Control Command
Completed (FLG)
signal
398
PLC Link Connections
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Control Command
Execution Active
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
(1) (2) (3)
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 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 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)
(4)
FQ2-S4 User's Manual