F39-TGR-CVL-B-10-R datasheet(35/98 Pages) OMRON

35 / 98 page

SECTION 6

Diagnostic and Test Features

6-1

Individual Beam Indicators (IBI)

All MS4800 systems have a visible red LED as an Individual Beam Indicator

adjacent to each infrared beam. These IBIs are located on the receiver. The

IBI will light when the infrared beam fails to meet the conditions necessary for

the system to remain in the MACHINE RUN state. When less than 10 consec-

utive beams are clear, every other IBI will light indicating that the MS4800 is

not synchronized. IBIs are not a safety critical component. An IBI failure will

not cause an alarm condition and the system will continue to operate.

Additionally, error codes are displayed using the IBIs close to the connector

endcap.

6-2

External Device Monitoring (EDM)

EDM is an important safety function. It monitors the MS4800 system interface

to the guarded machine, checks to ensure that the control elements are

responding correctly to the light curtain and detects any inconsistency

between the two external control devices. This is necessary to detect a mal-

function within the interface which prevents a stop signal from reaching the

machine controller. The connection for the EDM is made at the receiver. On

power-up, the MS4800 system looks for a closed to 0VDC condition. If this is

found, it will enter a state consistent with the selected operating mode. When

the MS4800 system enables its safety outputs, it monitors the external

devices for a closed to open transition. This transition must occur within

300ms or the MS4800 system will then enter an alarm state. Additionally, if

the EDM connections are incorrectly wired, the system will enter an alarm

state.

Note For proper operation of the MS4800 system when EDM is not active, the EDM

input must be wired to the MS4800 system 0 VDC line.

The EDM function can be activated and deactivated using the selector

switches on the receiver unit.

6-3

Machine test signal (MTS)

Some applications require that the machine guarding system be tested by the

machine controller during a non-hazardous portion of the machine cycle to

verify that the guarding system is functioning properly. The MTS option on the

transmitter provides this capability. The MTS is provided by placing a nor-

mally-closed switch across the MTS and MTS Return lines of the transmitter.

When the transmitter recognizes a close-to-open transition on this switch a

beam block state will be simulated on the transmitter and the receiver will

enter the MACHINE STOP state. MTS is active as long as the switch is held

open.

6-4

Range selection

The MS4800 offers operating range selection: short range is 3 m and long

range is 7 m for the 14 mm models. For the 30mm models the short range is

8m and long range is 20 m. This function is useful when there are many light

curtains operating within a small space and the possibility of cross-talk is

likely.

F39-TGR-CVL-B-10-R Datasheet(PDF) 35 Page - Omron Electronics LLC

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