IDEC FS1A Controller - Manual (Page 94)

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●External device monitoring inputs： X14 and X15 (T14 and T15)
X14 and X15 (T14 and T15) function as external device monitoring inputs.
X14 and T14 are used as contact monitors for external devices connected to Y0 and Y1.
X15 and T15 are used as contact monitors for external devices connected to Y2 and Y3.
Warning
Safety check signals (pulses signals) are transmitted from the drive terminals (T14, T15) to
diagnose external devices and monitor circuits. Safety check signals can not be used as the
power for connected devices.
Note: If there are unused safety outputs, short between the external device monitoring terminals
(Xn) corresponding to the unused safety outputs and the drive terminals (Tn). If they are not
shorted, the SafetyOne detects an input monitoring error. As the result, the error LED displays “1”
and the state changes to the Protection state.
● Start inputs： X16 and X17
X16 is used in teach mode, and it is used to control the start of the safety outputs as an “auto
start”, which does not use the start switch, or “manual start”, which does not detect welding of the
start switch.
X17 is used to control the start of the safety outputs as a “control start” which detects welding of
the start switch.
In teach mode: When X16 is ON (the ON state of X16 must be longer than 0.1s) the device
connected to safety input 2 is in a safe state, function output of self-hold function circuit 1 is turned
ON. When X17 changes from OFF→ON→OFF (the ON state of X17 must be kept on from
between 0.1s to 5s) while the devices connected to safety input 5 and 6 are in a safe state,
functional output of self-hold function 3 is turned ON. As the result of being turned ON the
functional outputs self-hold function 1 and 3, the start condition is established.
In auto mode: When X17 changes from OFF→ON→OFF (the ON state of X17 must be on
between 0.1s to 5s) the devices connected to safety inputs 3 to 6 are in safe state, functional
output of self-hold function 2 and3 are turned ON, and the start condition is established.
●Safety outputs (with OFF-delay timer): Y0 to Y3
Y0 to Y3 function as safety outputs with the OFF-delay timer. When the timer is set to “0s”
(indication “1”), the safety outputs shut OFF immediately.
Y0 and Y1: Safety output 1
Y2 and Y3: Safety output 2
Warning
Although teach mode is selected, the preset OFF-delay timer must be added to the reaction time
of the SafetyOne.