IDEC FS1A Controller - Manual (Page 46)

BASIC OPERATIONS
4-8
Canceling 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, when the EDM input is OFF while the safety outputs
are transitioning from OFF to ON or the EDM input is ON while the safety outputs are
transitioning from ON to OFF by output control. In the Protection state, the safety outputs are
turned OFF and "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 not achieved during OFF-delay
operation of safety outputs.
•In case of an error with muting input, the Protection state is cancelled by turning OFF of the appropriate
muting input. But cancellation is not achieved during OFF-delay operation of safety outputs.
•In case of an error with mode select input, the Protection state is cancelled by turning OFF 1 of the
appropriate 2 inputs. But the cancellation is not achieved during OFF-delay operation of safety outputs.
•In case of an error with the EDM input, the Protection state is cancelled by turning ON the
appropriate EDM input. When an EDM input causes an error, the corresponded safety output is
not turned ON, but the other 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
Safety output types
EDM inputs
(External Device Monitor inputs)
Safety outputs
T14-X14 Y0, Y1
Dual channel outputs
T15-X15 Y2, Y3
T12-X12 Y0
T13-X13 Y1
T14-X14 Y2
Single channel outputs
T15-X15 Y3
• Cancellation by resetting power to SafetyOne
The Protection state is cancelled by restarting 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.