Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 46)

page 46
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Troubleshooting and Maintenance
EZ-SCREEN Grid
Instruction Manual
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.
Error
Description
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, or
• by an overload (greater than 0.5A).
Reset Input Error
This error occurs when the Reset switch
is closed (or the wiring is shorted to
+24V) during power-up.
EDM Input Error
Can occur for the following reasons:
• 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.
Receiver Error
This error can occur due to either
excessive electrical noise or an internal
failure.
Appropriate Action
• 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.
• 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.
• 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.
• 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.
Diagnostic
Display
Figure 5-1a. Receiver error codes
Excessive Noise Error
This error can occur due to 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.