3 - 33
3 Part Names and Functions
NX-series Safety Control Unit User’s Manual (Z930)
3-3 Safety I/O Functions
3
3-3-1 Safety Input Functions
Precautions for Correct Use
If an OFF delay is used, the OFF delay time affects the safety reaction time. Add the OFF delay
time to the safety reaction time. (Refer to 4-1 Safety Reaction Times on page 4-2.)
Operation with an ON Delay
You can filter out ON pulses for the width that is set with the ON delay time.
*1. This is the time that the error status (control data, status data, and indicator status) is held (1 s min.).
Operation with an OFF Delay
You can filter out OFF pulses for the width that is set with the OFF delay time.
*1. This is the time that the error status (control data, status data, and indicator status) is held (1 s min.).
Safety input terminal
Internal timer
Safety input data
I/O indicator (yellow)
I/O indicator (red)
ON OFF ON
ON OFF
OFF
ON OFF
OFFON Error
ON
*1
ON
delay
Counter
cleared.
ON
delay
Counter
cleared.
Counter
cleared.
OFF delay
Safety input terminal
Internal timer
Safety input data
I/O indicator (yellow)
I/O indicator (red)
OFF ON OFF
OFF ON OFF
ON
OFF ON
OFF Error
ON
*1
Counter
cleared.
Counter
cleared.