10.3 Normal Operation
10.3.1 System Power-Up
The EZ-SCREEN LPM powers up in one of two ways, depending on the trip/latch output configuration. If it is set for trip
output, it powers up and resets automatically; if it is set for latch output, it requires a manual reset procedure after the
power-up and sensor alignment.
Trip Output Power-Up: When power is applied, each sensor conducts self-tests to detect critical internal faults, determine
configuration settings, and prepare the EZ-SCREEN LPM for operation. If either sensor detects a critical fault, scanning
ceases, the receiver outputs remain Off and diagnostic information displays on the sensor’s Diagnostic Display. If no faults
are detected, the EZ-SCREEN LPM automatically enters Alignment mode, and the receiver looks for an optical sync pattern
from the emitter. If the receiver is aligned and receives the proper sync pattern, it enters Run mode and begins scanning to
determine the blocked or clear status of each beam. No manual reset operation is required.
Latch Output Power-Up: When power is applied, each sensor conducts self-tests to detect critical internal faults, determine
configuration settings, and prepare for operation. If either sensor detects a critical fault, scanning ceases, the receiver
outputs remain Off and diagnostic information is displayed on the sensor’s Diagnostic Display. If no faults are detected, the
EZ-SCREEN LPM automatically enters Alignment mode, and the receiver looks for an optical sync pattern from the emitter.
If the receiver is aligned and receives the proper sync pattern, it begins scanning to determine the blocked or clear status of
each beam. When all beams are aligned, the Yellow Reset indicator double-flashes to indicate the EZ-SCREEN LPM is
waiting for a manual reset. After a valid manual reset, the EZ-SCREEN LPM enters Run mode and continues scanning.
10.3.2 Run Mode
Trip Output Configuration: If any beams become blocked while the EZ-SCREEN LPM is running with trip output selected,
the receiver outputs turn Off within the stated EZ-SCREEN LPM response time (see
then become clear, the receiver outputs come back On. No resets are needed. All required machine control resets are
provided by the machine control circuit.
Latch Output Configuration: If any beams become blocked while the EZ-SCREEN LPM is running with latch output
selected, the receiver outputs turn Off within the stated EZ-SCREEN LPM response time (see
(p. 14)). If all
the beams then become clear, the receiver Zone indicators will all be Green and the Reset indicator single-flashes,
indicating the EZ-SCREEN LPM is waiting for a manual latch reset. In latch output operation, the outputs come back On
only when all beams are clear and after a manual reset. The EZ-SCREEN LPM will wait for a manual reset; when a valid
reset signal is received and all beams remain clear, the receiver outputs turn On.
Internal Faults (Lockouts): If either sensor detects a critical fault, scanning ceases, the receiver outputs turn Off and
diagnostic information displays on the sensor’s Diagnostic Display. For resolution of error/fault conditions, see
(p. 76).
EZ-SCREEN Low-Profile System with Integral Muting
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