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Shows OSSD outputs ON (GREEN) or OFF (RED), blanking enabled, or system in Lockout status.
Multiple-digit codes are sequential, followed by a pause for status indication.
Codes indicating system status when the amber RUN Mode LED is ON.
Error caused by shorted outputs, OSSD short, or overload.
Occurs due to electrical noise, internal failure, or incorrect blanking switch setting.
Occurs when EDM input is open at power up or fails to respond within 250 ms.
Occurs when blanked beams become clear after object removal or movement.
Fixed Blanking programming mode (teach) exceeds the ten minute limit.
Cascade receiver or EDM wiring not terminated properly in a cascaded system.
Occurs due to excessive levels of electrical noise in a cascaded system.
Operation of channels A and B mismatch by more than 3 seconds.
Shows emitter in RUN mode (GREEN transmitting) or Lockout status (flashing RED).
Multiple-digit codes are sequential, followed by a pause for status indication.
Codes indicating system status when the amber RUN Mode LED is ON.
Early warning for potential LED problem, not immediate lockout.
Occurs if ID Input is not connected, due to noise, or internal failure.
The EZ-SCREEN LS Safety Light Screen is a safety device designed to protect personnel from hazards in industrial environments by creating a sensing field. It consists of an emitter and a receiver, both equipped with diagnostic displays and status LEDs that provide continuous feedback on the system's operational status, configuration, and any error conditions. The device also features Active Alignment (Segment) Indicators to assist with installation by providing beam block information.
The primary function of the EZ-SCREEN LS is to detect the presence of an object within its defined sensing area. When an object, such as a person's hand or body, interrupts the light beams between the emitter and receiver, the system signals a "blocked" condition, which typically results in the machine being guarded to stop or prevent hazardous motion.
The system operates in various modes, indicated by the status LEDs. In "Run Mode," a solid RED light signifies a blocked condition with the OSSD (Output Signal Switching Device) outputs OFF. A solid GREEN light indicates that the defined area is clear, the OSSDs are ON, and the emitter is transmitting. If blanking is enabled, the status LED will flash GREEN, still indicating a clear defined area with OSSDs ON.
A "Lockout" condition, indicated by a flashing RED light, signifies a system fault and is accompanied by a displayed error code on the diagnostic display. This condition requires attention and troubleshooting to restore the system to safe operation.
The EZ-SCREEN LS is designed for ease of use and installation, with several features that enhance its functionality and maintainability:
Diagnostic Displays: Both the emitter and receiver incorporate 7-segment diagnostic displays. These displays show operational codes during normal "Run Mode" and error codes during a "Lockout" condition. Operational codes include a single dash for "Run Mode," "C1" or "C2" to indicate the sensor's configured scan code (both emitter and receiver must match), "CH1" if the first sensing beam is blocked or scan codes don't match, "nnn" to show the number of blocked beams, and "H" if the Cascade Stop Input is open. Error codes, displayed sequentially followed by a pause, provide specific information about system faults, aiding in quick identification and resolution.
Status Indicators: Individual bi-color (red/green) status LEDs on both the emitter and receiver offer immediate visual feedback. On the receiver, the status indicator shows OSSD output status (GREEN for ON, RED for OFF), blanking status (flashing GREEN), and lockout status (flashing RED). An amber RUN Mode indicator on the receiver confirms the system is operational and not in lockout. On the emitter, the status indicator shows RUN mode (GREEN transmitting) or lockout status (flashing RED).
Active Alignment Indicators: These indicators provide real-time beam block information, simplifying the alignment process during installation and ensuring optimal performance.
Scan Code Configuration: The system allows for configuration of scan codes (C1 or C2). It is crucial that both the emitter and receiver are set to the same scan code for proper operation.
Fixed Blanking: This feature allows specific beams to be intentionally ignored, typically for fixed objects within the sensing field that should not trigger a safety stop. The system provides error codes (e.g., "10 Fixed Blanking Error") if a blanked beam becomes clear, indicating that the object has been removed or moved, which could compromise safety. Programming for fixed blanking involves a "teach" mode, with a timeout limit to prevent extended programming states.
Cascading Capability: The EZ-SCREEN LS can be cascaded, meaning multiple receivers and emitters can be connected together to create a larger sensing field. The system provides specific error codes (e.g., "13 Cascade Error," "7 Receiver Error," "64 Excessive Noise Error - Cascade Input," "H Cascade Input Simultaneity") related to issues with cascaded connections, such as improper termination, intermittent connections, or excessive electrical noise.
The diagnostic and status indicators are key to the maintainability of the EZ-SCREEN LS, enabling efficient troubleshooting and reducing downtime:
Error Code Diagnostics: A comprehensive list of error codes (e.g., "1 Output Error," "4 Receiver Error," "8 EDM Error," "10 Fixed Blanking Error," "12 Programming Timeout Error," "13 Cascade Error," "25 Emitter Error," "27 Emitter LED Problem," "64 Excessive Noise Error - Cascade Input," "H Cascade Input Simultaneity") is provided, each with a detailed description of the problem and potential solutions. These solutions often involve checking wiring, cycling power, performing checkout procedures, or replacing components.
Troubleshooting Guidance: The manual provides specific corrective actions for each error code. For example, an "Output Error" (Code 1) suggests checking for shorted OSSD outputs or overloads. A "Receiver Error" (Code 4) might require cycling power, checking ground connections, or performing daily/initial checkout procedures. An "EDM Error" (Code 8) points to issues with the External Device Monitoring input, requiring verification of wiring and external device response.
Early Warning Indicators: The "27 Emitter LED Problem" is an example of an early warning indicator. This code suggests a potential issue with an emitter LED that, while not immediately causing a lockout, could lead to one in the future, allowing for proactive maintenance.
Recovery Procedures: The manual references "Recovery Procedures" for certain errors, indicating a structured approach to restoring the system to operation after a fault. Similarly, "Daily Checkout Procedures" and "Initial Checkout Procedures" are mentioned as part of the troubleshooting process, emphasizing routine checks to ensure continued safe operation.
Wiring and Connection Verification: Many troubleshooting steps involve verifying wiring, ground connections, and cordset connections, particularly in cascaded systems, highlighting the importance of proper electrical installation for reliable performance.
By providing clear visual indicators and detailed diagnostic codes with corresponding solutions, the EZ-SCREEN LS Safety Light Screen simplifies the process of monitoring, configuring, and maintaining the safety system, contributing to a safer and more efficient work environment.
General| Housing Material | Aluminum |
|---|---|
| Operating Voltage | 24V DC |
| Frame Color | Yellow |
| Type | Safety Light Screen |
| Protection Rating | IP65 |
