Omron F3SG-SRB Series - Pre-Reset; Overview

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Chapter2 Pre-Reset
F3SG-SR
User’s Manual
System Operation and Functions
2-9. Pre-Reset
Install the pre-reset switch always in the hazardous zone and where it cannot be activated from
outside the hazardous zone.
2-9-1. Overview
An operator may enter and work in the hazardous zone for maintenance.
Under such a circumstance, another operator may press the reset switch to restart the machine
without recognizing the operator working in the hazardous zone, posing a danger. The Pre-Reset
function ensures safety for an operator working in the hazardous zone by adding another reset switch
(pre-reset switch) in the hazardous zone.
If the Pre-Reset function is enabled, an operator can work in the hazardous zone and press the pre-
reset switch installed in the hazardous zone, pass the sensor, and press the reset switch to restart the
machine.
Shown below is overview of restarting the machine using the Pre-Reset.
(Example of the maximum number of times the F3SG-SR can be blocked is set at 1)
1. Press the pre-reset switch. (Input a PRE-RESET signal.)
2. Pass and block the F3SG-SR.
3. Press the reset switch to restart the system. (Input a RESET signal.)
Refer to 2-1. Combination of Functions for more information on the use in conjunction with other functions.
F3SG-SRA 
F3SG-SRB 
F3SG-SR
Operator
Pre-reset switch
Reset switch
Hazardous area
2.
3.
1.