KEYENCE LK-3100 - Manual (Page 15)

15
Alarm hold function
• Setting DIP switch 1 to the upper position (HOLD)
The sensor does not produce the 12 V (approx. 21 mA) analog output
during alarm output (range over/light quantity alarm), but retains the
analog output value just prior to the alarm output. This function is
canceled when measurement is again possible.
• Setting DIP switch 1 to the lower position (12 V)
The sensor produces the 12 V (21.6 mA) analog output during alarm
output.
Note: The alarm output is produced in the alarm condition even if the
alarm hold function is used.
USING EACH FUNCTION DIP SWITCHES
The condition in which the measurement is
impossible can be ignored, eg. the detection
of holes in a target.
Key-lock function
• Setting DIP switch 2 to the upper position
The sensor locks the shift adjustment, span adjustment, ZERO/RESET
and RESET keys so that each function cannot change. The shift (AUTO
ZERO) and span values are fixed just prior to the lock operation.
Use this function to prevent the output voltage from being acciden-
tally reset to zero.
• Setting DIP switch 2 to the lower position (FREE)
The key-lock function is set to FREE and the lock operation is canceled.
Reference: The AUTO ZERO input through the external input terminal is
effective regardless of the LOCK or FREE setting. (However, with the
LOCK set, the data will not be stored when the power is turned off.)
HOLD
12V
3 2 1
DIP switch
Analog output
Analog output
• DIP switch to lower position (12V)
• DIP switch to upper position (HOLD)
LOCK
FREE
3 2 1