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EZ-SCREEN LS Safety Light Screen
p/n 190579 Rev A 1
Receiver Indicators
Emitter Indicators
System Operation, Diagnostics and Troubleshooting
Both emitter and receiver feature 7-segment Diagnostic Displays and individual Status LEDs to provide continuous
indication of operating status, configuration and error conditions. Active Alignment (Segment) Indicators provide for
beam block information and easier installation.
Run Mode: Indicated by the sensor’s status LEDs:
•Solid RED (Blocked condition, OSSDs OFF),
•Solid GREEN (Defined area clear, OSSDs ON; Emitter transmitting)
•Flashing GREEN (Blanking enabled, Defined area clear, OSSDs ON);
Lockout condition: Indicated by the sensor’s status LED
•Flashing RED (Lockout, in conjunction with displayed error code, see below)
See EZ-SCREEN LS instruction manual p/n 179480 for complete installation, operational, and troubleshooting
information, and applicable cautions and warnings.
Receiver
Status Indicators
•A single red/green Status indicator shows when the OSSD outputs are ON (GREEN) or OFF (RED),
blanking is enabled (flashing GREEN), or the System is in Lockout status (flashing RED).
•An amber RUN Mode indicator shows when the system is operational (not in lockout).
Diagnostic Display
(Multiple-digit codes are sequential, followed by a pause)
Operational Codes (RUN Mode, amber LED is ON)
Code
Description
-
RUN Mode (single dash)
C 1
Sensor configured for Scan code 1
C 2
Sensor configured for Scan Code 2
Note: both emitter and receiver must be configured for the same Scan Code
C H 1
The first sensing beam (CH1 synchronization beam) at the display end of sensor is blocked (must
remain clear) or the receiver Scan Code does not match the emitter Scan Code.
n n n
The number of blocked beams.
H
Cascade Stop Input open (stop command)

EZ-SCREEN LS Safety Light Screen
p/n 190579 Rev A 2
Error Codes (with flashing RED status indicator)
Code
Problem
Solution
1
Output Error
Error is caused by:
•one or both outputs being shorted to a power supply (high or low)
•by shorting OSSD 1 to OSSD 2
•by an overload (greater than 0.5 A)
Possible corrective action(s):
•Disconnect the OSSD loads and cycle power to the receiver.
•If the error clears, the problem is in the OSSD load(s) or in the load wiring.
•If the error continues with no load connected, replace the receiver.
4
Receiver Error
This error occurs because of either excessive electrical noise or an internal failure.
This error can also occur when the remote fixed blanking RUN/PROGRAM switch is
in the PROGRAM position during power-up.
Possible corrective action(s):
•Cycle power, See Recovery Procedures in the instruction manual.
•If the error clears, perform a Daily Checkout procedure (per EZ-SCREEN
Checkout Procedures: Shift and Daily Checkout Procedure; Daily Checkout
Card) and if the System checks out, resume operation. If the System fails
the Daily Checkout procedure, replace the receiver.
•If the error continues, check the ground connection (pin 7).
•If the sensor has a good earth ground connection to pin 7, perform the Initial
Checkout procedure (per Initial Checkout Procedure in the instruction
manual).
•If the error clears, check the external connections and configuration settings.
•If remote fixed blanking is used, ensure RUN/PROGRAM is in the RUN
position and cycle power.
•If the error continues, replace the receiver.
7
Receiver Error
This error can be caused by intermittent connections between cascaded receivers or
excessive electrical noise.
Possible corrective action(s):
•Verify the cordset connections between the cascaded receivers.
•If the error continues, replace the cordset(s).
•If the error still continues, replace the receiver with the error code.
8
EDM Error
This error can occur when the EDM input is open at power up or if the signal fails to
respond within 250 ms of the OSSDs changing state (On to Off).
Possible corrective action(s):
•Verify that the EDM wiring is correct and that the external devices meet the
requirements described in Machine Primary Control Elements and EDM
Input in the instruction manual
•If the error continues, remove power to the guarded machine, disconnect the
OSSD loads, disconnect the EDM input signals, configure EDM for No
Monitoring (per Machine Primary Control Elements and EDM Input in the
instruction manual) and conduct the Initial Checkout procedure
•If the error clears, the problem is in the External Device contacts or wiring,
or is a response-time problem of the external devices. Verify that the EDM
wiring is correct and that the external devices meet the requirements
described in Machine Primary Control Elements and EDM Input in the
instruction manual.
•If the error continues, check for noise on the EDM inputs (see Electrical and
Optical Noise in the instruction manual).
1 0
Fixed Blanking
Error
This error occurs when beam(s) that have been blanked (programmed to ignore a
fixed object) become clear when the object is removed or moved.
Possible corrective action(s):

EZ-SCREEN LS Safety Light Screen
p/n 190579 Rev A 3
Code
Problem
Solution
•Reposition the object and cycle power.
•Re-program (teach) the fixed blanked object(s), see Remote Fixed Blanking
Programming Procedures in the instruction manual.
1 2
Programming
Timeout Error
This error occurs when the Fixed Blanking programming mode (teach) exceeds the
ten minute limit.
Possible corrective action(s):
•Re-program (teach) the fixed blanked object(s), see Remote Fixed Blanking
Programming Procedures in the instruction manual.
1 3
Cascade Error
This error occurs when a cascade receiver is not terminated properly or if the EDM
wiring to a cascade receiver is not terminated properly
Possible corrective action(s):
•Verify that the last receiver in the cascade is terminated properly (see
Cascadeable EZ-SCREEN LS in the instruction manual).
•Verify that the EDM wiring is correct.
•Verify the cordset connections between cascaded receivers.
•If the error continues, replace the receiver.
NOTE: In a cascaded system, all receivers are connected together, and all emitters
are connected together.
6 4
Excessive Noise
Error – Cascade
Input
This error can occur due to excessive levels of electrical noise.
Possible corrective action(s):
•Cycle power (see Recovery Procedures in the instruction manual).
•If the error clears, perform the daily checkout procedure (per EZ-SCREEN
Checkout Procedures: Shift and Daily Checkout Procedure; Daily Checkout
Card) and if the System checks out, resume operation. If the System fails
the Daily Checkout procedure, replace the receiver.
•If the error continues, check the ground connection (pin 7).
•If the sensor has a good earth ground connection to pin 7, perform the Initial
Checkout procedure (Trip Test) in the instruction manual.
•If the error clears, check for sources of electrical noise (see Electrical and
Optical Noise in the instruction manual).
•If the error continues, replace the receiver.
H
Cascade Input
Simultaneity
Operation of channels A and B mismatch > 3 seconds.
Possible corrective action(s):
•Check operation of Channel A and Channel B of cascade input.
•Cycle power or cycle the input. See Emergency Stop Buttons in Cascaded
Systems and Interlock Switches in Cascaded Systems in the instruction
manual.
Emitter
Status Indicators
•A single bi-color red/green Status indicator shows when the emitter is in RUN mode (GREEN transmitting),
or the System is in Lockout status (flashing RED).
Diagnostic Display
(Multiple-digit codes are sequential, followed by a pause)
Operational Codes (RUN Mode, amber LED is ON)
Code
Description
-
RUN Mode (single dash)

EZ-SCREEN LS Safety Light Screen
p/n 190579 Rev A 4
Code
Description
C 1
Sensor configured for Scan code 1
C 2
Sensor configured for Scan Code 2
Note: both emitter and receiver must be configured for the same Scan Code
2 7
Emitter LED Problem - This is not an error that would immediately result in a lockout. This
indication can occur due to a potential problem with an LED and is provided as an early warning
indicator.
Error Code (with flashing RED status indicator)
Code
Problem
Solution
2 5
Emitter Error
This error can occur if the ID Input (pin 3, Orange) is not connected to +24 V dc.
Excessive electrical noise or an internal failure can also cause this error.
Possible corrective action(s):
•Verify that the ID Input (ID_in) wiring is connected to +24 V dc. See Generic
Wiring Diagram—5-pin and 8-pin Emitter in the instruction manual
•Cycle the power to the emitter per Recovery Procedures in the instruction
manual
•If the error clears, perform the daily checkout procedure (per EZ-SCREEN
Checkout Procedures: Shift and Daily Checkout Procedure; Daily Checkout
Card). If the System checks out, resume operation. If the System fails,
replace the emitter
•If the error continues, check the ground connection (see Cordsets in the
instruction manual)
•If the sensor has a good earth ground connection, check for electrical noise
(see Electrical and Optical Noise in the instruction manual)
•If the error persists, replace the emitter