Communication Between The Sensor Controller And An External Device - Omron FH series User Manual

Communication between the Sensor Controller and an External Device

Communication between the Sensor Controller and external device takes place as shown below.
The following figure shows the flow when a communications command is used to start a measurement and then
output data.
(2) The data at this
point is output to the
Communications
Module.
An Output Unit processing item is required to
perform data output. (Multiple Output Unit items
can be used.)
(1) When the Sensor Controller receives a command from a PLC or other external device, it executes the
command and returns a response.
(2) The data obtained after the measurement is performed is output via the Communications Module by
the Output Unit (an abbreviation for Results Output Unit) processing item in the measurement flow.
(3) The measurement data is output when the Output Unit is executed, not when the measurement is
actually finished.(*2)
*2: If handshaking is used for output control, the measurement data will remain in the Communications Module in a standby state
until a data output request (DSA signal) is received from an external device. Refer to
(p.32).
IMPORTANT
To output data, you must place an Output Unit processing item in the measurement flow.
You can place multiple Output Unit processing items in the measurement flow. Refer to
Data Output (p.29).
16
Communicating with an External Device
PLC or other external device
(1) Command
Example: Starting a
measurement, etc.
Sensor Controller
Measurement
Communications processing
flow
Camera Input
Search
Communications
Output Unit
Data output request
(DSA signal)*1
Response (3) Data
Communications
processing
Module
Result Completion signal (GATE signal)*1
*1: When output control is set to [Handshaking]
(data output is controlled by the DSA and
GATE signals). Refer to
Control Signals and Status Signals (p.22).
Vision System FH/FZ5 Series User's Manual
output
Control with
Data Output Control with Handshaking
Settings Required for
for Communications Settings (Z342)