Safety Light Curtain Systems Owner's manual

P/N 68413 rev. A 43
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: [phone]
EZ-SCREEN Point
Instruction Manual
Troubleshooting and Maintenance
5.1.1 Receiver Error Codes
Refer to Figure 5-1 for a full description of receiver error codes and what to do when they occur.
Diagnostic
Display
Error Description Appropriate Action
Output Error – caused by
• one or both outputs being shorted
to a power supply (high or low),
• by shorting OSSD 1 to OSSD 2, or
• by an overload (greater than 0.5A).
• Disconnect the OSSD loads and reset 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.
Reset Input Error – occurs when
• the Reset switch is closed (or the
wiring is shorted to +24V) during
power-up.
• Verify that the Reset switch is in the open position.
• Reset the receiver per Section 4.2.
• If the error remains, disconnect the reset wire at terminal 5; remove and reapply
input power.
• If the error clears, the problem is in the Reset switch or in the wiring.
• If the error continues when the reset wire is disconnected, replace the receiver.
EDM Input Error – caused by
• EDM wiring configuration does
not match the EDM switch
configuration.
• No connection to EDM terminals.
• Both EDM inputs fail to respond
within 200 ms of the OSSDs
changing state
(ON or OFF).
• Excessive noise on EDM inputs.
• Verify that the EDM configuration switches are set correctly and that the wiring is
correct for the EDM type configured (see Section 3.7.3).
• Reset the receiver.
• If the error continues, remove power to the guarded machine, disconnect the OSSD
loads, disconnect the EDM input signals, configure EDM for No Monitoring (Section
3.7.3) and conduct the Initial Checkout procedure in Section 3.6.
• If the error clears, the problem is in the external device contacts or wiring, or is a
response-time problem of the external devices. Check to see that the EDM wiring
is correct and that the external devices meet the requirements described in Section
3.7.3.
• If the error continues, check for excessive noise on the EDM inputs
(see Section 5.2).
• If the error continues after verifying electrical noise is not present, replace the
receiver.
Receiver Error – caused by
• either excessive electrical noise or
an internal failure.
• Perform a reset per Section 4.2.
• If the error clears, perform a Daily Checkout procedure (per Section 6.4) and if OK,
resume operation. If the system fails the Daily Checkout procedure, replace the
receiver.
• If the error continues, check the ground connection (terminal 1).
• If the sensor has a good earth ground connection to terminal 1, perform the Initial
Checkout procedure (per Section 3.6).
• If the error clears, check the external connections and configuration settings.
• If the error continues, replace the receiver.
Excessive Noise Error – caused by
• excessive levels of electrical noise.
• Perform a reset per Section 4.2.
• If the error clears, perform a Daily Checkout procedure (per Section 6.4) and if
OK, resume operation. If the system fails the Daily Checkout procedure, replace the
receiver.
• If the error continues, check the ground connection (terminal 1).
• If the sensor has a good earth ground connection to terminal 1, perform the Initial
Checkout procedure (Section 3.6).
• If the error clears, check for sources of electrical noise (see Section 5.2).
• If the error continues when performing the Initial Checkout procedure, replace the
receiver.
Figure 5-1a. Receiver error codes