Section 3 -- System Operation; Operating States; Machine Run; Machine Stop - Omron MiniSafe 4800 Series Installation And Operating Manual

3 S O
YSTEM
The MS4800 system is a microprocessor-controlled, infrared, transmitted-beam safety light curtain.
The system consists of a receiver assembly and a transmitter assembly. The receiver and transmitter
assemblies are not physically interconnected.
An MS4800 system is used where personnel protection is required. Typical applications include
mechanical power presses, robotic work cells, filter presses, injection molders, food processing
equipment and automated assembly equipment.
3 . 1 O
The operating condition of an MS4800 system is described in terms of states. The following operating
states exist for an MS4800 system.

MACHINE RUN

3.1.1
The two receiver safety outputs are in the ON state, the green MACHINE RUN indicator is lit, and the
auxiliary output is in a state consistent with its configuration. The protected machine is allowed to
operate. Pressing and releasing the start button has no effect.

MACHINE STOP

3.1.2
The two receiver safety outputs are in the OFF state, the red MACHINE STOP indicator is lit, and the
auxiliary output is in a state consistent with its configuration. The protected machine is not allowed to
operate.

INTERLOCK

3.1.3
The two receiver safety outputs are in the OFF state, the red MACHINE STOP indicator and yellow
INTERLOCK indicator are lit. The auxiliary output is in a state consistent with its configuration. The
INTERLOCK state does not allow the protected machine to operate until the detection zone is clear of
obstructions and the start button is pressed and released.

ALARM

3.1.4
The two receiver safety outputs are in the OFF state, the red MACHINE STOP indicator is lit, the
yellow INTERLOCK indicator is flashing, and the auxiliary output is in the OFF state. The alarm state
does not allow the protected machine to operate. The primary difference between alarm and
INTERLOCK is that the MS4800 system will remain in the alarm state until the alarm is corrected,
regardless of power cycling.
3 . 2 O
System operating modes determine the start-up and operating behavior of an MS4800 system.
Operating mode definitions rely on the operating states presented above. Operating mode selection is
configured via switches on the MS4800S in the receiver and transmitter.
NOTE!
ALARM state with its safety outputs in the OFF state.
OMRON Scientific Technologies Inc.
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PERATION
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P ER AT I NG T A TES
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P ER AT I NG OD ES
If internal alarms are detected by the system during power-up or operation, it will enter the
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© OMRON STI 0613 PN99804-0060 Rev. B