7 System Operation
7.1 Security Protocol
Certain procedures for installing, maintaining, and operating the S4B must be performed by either Designated Persons or
Qualified Persons.
A
Designated Person
is identified and designated in writing, by the employer, as being appropriately trained and qualified to
perform system resets and the specified checkout procedures on the S4B. The Designated Person is empowered to:
•
Perform manual resets and hold possession of the reset key
•
Perform the Daily Checkout Procedure
A
Qualified Person
, by possession of a recognized degree or certificate of professional training, or by extensive knowledge,
training, and experience, has successfully demonstrated the ability to solve problems relating to the installation of the S4B
System and its integration with the guarded machine. In addition to everything for which the Designated Person is
empowered, the Qualified Person is empowered to:
•
Install the S4B System
•
Perform all checkout procedures
•
Make changes to the internal configuration settings
•
Reset the System following a Lockout condition
7.2 Normal Operation
7.2.1 System Power-Up
When power is applied, each sensor conducts self-tests to detect critical internal faults, determine configuration settings, and
prepare the S4B for operation.
If either sensor detects a critical fault, scanning ceases, the receiver outputs remain Off and diagnostic information displays.
If no faults are detected, the S4B automatically enters Alignment mode, and the receiver looks for an optical sync pattern
from the emitter.
If the receiver is aligned and receives the proper sync pattern, it enters Run mode and begins scanning to determine the
blocked or clear status of each beam. No manual reset operation is required.
7.2.2 Run Mode
If any beams become blocked while the S4B is running, the receiver outputs turn Off within the stated S4B response time
on page 13). If all the beams then become clear, the receiver outputs come back On. No resets are
needed. All required machine control resets are provided by the machine control circuit.
Internal Faults (Lockouts)
: If either sensor detects a critical fault, scanning ceases, the receiver outputs turn Off and
diagnostic information displays. See
on page 42 for resolution of error/fault conditions.
7.2.3 Emitter Indicators
A single Status indicator shows whether power is applied, and whether the emitter is in Run mode or a Lockout condition.
Two Scan Code indicators show the scan code assigned to the emitter.
Emitter Operating Status
Status Indicator
Scan Code Indicator
Power-up
Red on for several seconds
Two LEDs red on, then flash green, then yellow
on for 10 seconds to indicate scan code:
•
One yellow LED = Scan Code 1
•
Two yellow LEDs = Scan Code 2
Run Mode
Green
Off
Lockout
Flashing Red
Off
S4B Safety Light Curtain
40
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