Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 32)

30
P/N 133487
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Overview
30
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
EZ-SCREEN
Instruction Manual
Installation and Alignment
3.4 Light Screen Initial Checkout
The initial checkout procedure must be performed by a Qualified
Person (see Section 4.1). It must be performed only after
configuring the System and after connecting the emitter and
receiver per Section 3.3.
Configuring the System for Initial Checkout
Verify that Test input is jumpered (if used) and the System is set
to the factory defaults for initial checkout and optical alignment.
(Factory defaults are for Trip Output, 2-Channel EDM, Reduced
Resolution OFF, and Scan Code 1. See Figure 4-1.)
The procedure is performed on two occasions:
•
To ensure proper installation when the System is first installed,
and
• To ensure proper System function whenever any maintenance
or modification is performed on the System or on the
machinery being guarded by the System. (See Section 6.1 for
a schedule of required checkouts.)
For the initial checkout, the EZ-SCREEN System must be
checked without power being available to the guarded machine.
Final interface connections to the guarded machine cannot
take place until the light screen system has been checked
out. This may require lockout/tagout procedures (refer to
OSHA1910.147, ANSI Z244-1, or the appropriate standard
for controlling hazardous energy). These connections will be
made after the initial checkout procedure has been successfully
completed.
Verify that:
•
Power has been removed from (or is not available to) the
guarded machine, its controls or actuators; and
• The machine control circuit or the Interface Module is not
connected to the OSSD outputs at this time (permanent
connections will be made later); and
• EDM is configured for No Monitoring, per Section 3.3.2.
3.4.1 Initial Power-Up and Optical Alignment
1. Inspect the area near the light screen for reflective
surfaces, including work pieces and the guarded machine.
Reflective surfaces may cause light beams to reflect around
a person in the light screen, preventing the person from being
detected and not stopping the machine motion. See Section
3.1.6.
Eliminate the reflective surfaces as possible by relocating
them, painting, masking or roughening them. Remaining
problem reflections will become apparent during step 5.
2. Verify that power is removed from the EZ-SCREEN
System and from the guarded machine and that the OSSD
safety outputs are not connected. Remove all obstructions
from the light screen.
Leaving power to the guarded machine OFF, make power and
earth ground connections on both the emitter and receiver
cables (see Figures 3-20 to 3-23) and then power up the
EZ-SCREEN System (only).
Verify that input power is present to both emitter and
receiver. At least one indicator on both emitter and receiver
should be ON and the start-up sequence should cycle.
3. Observe both the emitter and the receiver System Status
indicators and the receiver Zone indicators to determine light
screen alignment status:
• A Lockout condition (emitter or receiver) – the System Status
indicator single-flashing Red, and the receiver Zone and Reset
indicators OFF. Proceed to Section 5 for diagnostic information.
• Normal operating mode (emitter) – the System Status
indicator ON Green.
• TEST mode (5-pin emitters only) – a flashing Green System
Status indicator (Test input open, see Figure 3-20 and Section
5.2).
• A Latch condition (receiver), all optical beams clear – the
receiver System Status indicator ON Red and the Reset
indicator double-flashing Yellow; Zone indicators ON Green.
When the receiver is configured for Latch Output, the outputs
are ON only when all beams are clear and after a manual
reset (see Section 1.4.7). If a reset routine can cause a Clear
(RUN) condition, optimize the alignment as described in step 4.
If a Clear (RUN) condition can not be achieved, see “Blocked
condition” below.
• A Clear (RUN) condition (receiver) – the System Status
indicator ON Green (or flashing Green if Reduced Resolution
is enabled), and the Reset indicator ON Yellow. All Zone
indicators ON Green.
To optimize alignment and maximize excess gain, slightly
loosen the sensor mounting screws (x4) and rotate one sensor
left and right, noting the positions where the Status indicators
turn Red (Blocked condition); repeat with the other sensor
(see Figure 3-11). Center each sensor between those two
positions and tighten the end cap mounting screws, making
sure to maintain the positioning as the screws are tightened.
The sensor lenses should directly face each other. Proceed
to System Configuration (Section 3.4.2) once optimum optical
alignment is verified.
• A Blocked condition (receiver) is indicated by the System
Status indicator ON Red, the yellow Reset indicator ON, and
one or more Zone indicator(s) ON Red, identifying the location
of the blocked beams, and the number of blocked beams will
be displayed. Proceed to step #4.
NOTE: If beam 1 is blocked, Zone indicator 1 will be Red and all
others will be OFF. Beam 1 provides the synchronization
signal.
NOTE: If the Test input is open, the 3-digit Diagnostic Display
will indicate the total number of beams in the system
(minus one) and all Zone indicators will be Red.