IDEC FS1A Controller - Manual (Page 40)

4-7
Cancelling the Protection state
SafetyOne transitions to the Protection state if a failure is detected in an external device or an
error is detected in external wiring, such as when different operations are performed between
dual channel inputs or two muting inputs, or when the EDM input is OFF while the safety
outputs are transitioning from OFF to ON by output control. In the Protection state, the safety
outputs are turned OFF and a "1" is displayed in the error LED display. The Protection state can
be cancelled by the following methods.
• Cancellation by the connected control devices
•In case of an error with the dual channel input, the Protection state is cancelled by turning OFF
the appropriate dual channel input. (For example: Press an emergency stop switch or open a
guard equipped with an interlock device.) But cancellation is only achieved during OFF-delay
operation of safety outputs (Y0 to Y3).
•In case of an error with muting input (Logic 4 only), the Protection state is cancelled by turning
OFF of the appropriate muting input. But cancellation is only achieved during OFF-delay
operation of safety outputs (Y0 to Y3).
•In case of the error with mode select input (Logic 6 only), the Protection state is cancelled by
turning OFF 1 of the appropriate 2 inputs. But the cancellation is only achieved during
OFF-delay operation of safety outputs (Y0 to Y3).
•In case of an error with the EDM input, the Protection state is cancelled by turning ON the
appropriate EDM input. When 1 of EDM inputs causes an error, the corresponded safety output
is not turned ON, but the another safety output can be turned ON and after approximately 1s
turned OFF. For the relationship between EDM inputs and safety outputs, refer Table 4.3 shown
below.
Table 4.3 EDM inputs and corresponded safety outputs
EDM inputs
(External Device Monitor inputs) Safety outputs
T14-X14 Y0, Y1
T15-X15 Y2, Y3
• Cancellation by resetting power to SafetyOne
The Protection state is cancelled by restart of power to SafetyOne after removing the error
factor.
If the error factor that caused the change to the Protection state has been not removed, the unit
returns to the Protection state again.
• Cancellation by transition to Protection state
By the changing the configuration of a logic or timer switch, the state changes from Protection
state to Configuration state.
Warning
Turn OFF the power to SafetyOne before inspection and/or connecting of the wires.