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OMRON Scientific Technologies Inc.
© OMRON STI 0613 PN99804-0060 Rev. B
54
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The receiver first segment uses the IBI to indicate diagnostic codes. The IBI will only indicate fault
codes, when in the Fault state. In this state the yellow INTERLOCK LED will be flashing and the first
10 IBIs are used to display the fault code, see Figure 15-1
Example of IBI LED’s used to Show Fault
Code
.
Figure 15-1 Example of IBI LED’s used to Show Fault Code
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IG HT S
1. GREEN – The MS4800 is in the MACHINE RUN state.
2. RED - The MS4800 is in the MACHINE STOP state.
3. YELLOW INTERLOCK- The light curtain is waiting for the start button to be pushed. If the LED
is blinking, the light curtain is in a alarm condition.
4. AMBER – The light curtain is operating in a reduced resolution mode: Floating Blanking, Fixed
Blanking, Monitored Blanking and Reduced Resolution.
15.3.1
R
ECEIVER
T
RO UBLES HOOTING
If the yellow INTERLOCK LED is blinking:
1. Check the configuration for MPCE Monitoring. If MPCE Monitoring is inactive (via receiver
selector switches), the input (pink wire) must be connected to system ground. If MPCE is active,
the input must be connected to the normally closed contacts of the control relays of the guarded
machine or the monitor terminal of the RM module. See Section 10 --
Connecting To The Machine
Control Circuit
for an example.
2. Make sure both selector switches in the receiver endcap have been set properly and identically. See
Table 6-2
Receiver Selector Switch Settings
in manual.
3. Verify the power supply is within specified limits, see Section 13.1 --
System Specifications
.
4. Verify the light curtain is properly connected to the control relays of the guarded machine. If the
light curtain is not intended to be connected to control relays, see Section 10.1 --
Connecting to a
Safety Monitoring Device
of the manual for instruction.
5. Verify the control relays are within operating limits of the safety outputs. See Section 13 --
Specifications and Additional Information
.
Note: The pull-in voltage requirement of the relays must be satisfied. The 4800 provides V=V
supply
–2V on
each solid-state safety output.
Next group of 4
LED are on.
4th LED is off
First 3 LED are on.
Front View of
Receiver showing the
first 8 IBIs.
IBI LEDs are turned on to
indicate fault code 34,
which means OSSD 1
shorted to ground.
Interlock LED flashing on
receiver endcap
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