Preventing Mutual Interference Of Multiple Sensors - Omron FQ-CR2 User Manual

3-4 Preventing Mutual Interference of Multiple Sensors

When the same trigger signal is input to multiple Sensors, the lighting from one Sensor may affect the
measurements of the other Sensors. This is called mutual interference. This kind of interference can be
prevented offsetting the image input timing of each Sensor from when the trigger signal is received.
Example:
A trigger (i.e., the TRIG signal) is input to Sensor 0 and Sensor 1 at the same time.
Trigger Sensor
1
Change to the setup for to Sensor 1.
p. 34
2
Press [Image] – [Trigger setup] – [Trigger delay].
3
Set the trigger input delay time for Sensor 1.
p. 41
Important
• The delay time for preventing mutual interference must be longer than the shutter time.
When the lighting built into the Sensor is used, the shutter time is 4 ms max. Therefore make the delay at
least 4 ms.
FQ-CR2 User's Manual
Sensor 0
Sensor 0
Sensor 1
Sensor 1
Sensor 0 immediately begins image input when the trigger is input.
Sensor 1 begins image input after the specified time has passed.

Preventing Mutual Interference of Multiple Sensors

TRIG signal
Timing of taking the image
No trigger delay
Timing of taking the image
Sensor 1
trigger delay
43