RayTek MI3 Operating Instructions Manual page 115

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indicator in APDU-Status is set by the communicator and a diagnostic alarm is additionally
transmitted.
As part of the diagnosis of the fieldbus communicator, bit 2 indicates a communication error to the
pyrometer module. In this case, a diagnostic interrupt is triggered for the I/O controller.
As part of the diagnosis of the pyrometer module, bit 6 indicates a communication error to the
registered pyrometer module. In this case, a <Station problem-indicator> is sent to the I/O controller.
MI3
115
Rev. G Nov/2015

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Jeff Crabb
April 7, 2025

I am currently installing 4 modules, each with 2 of the Raytek MI3 units. 7 of the units arrived with the normal display (Bottom Unit in photo), but 1 has only a full white block in the display. Is this indicative of a failed unit, or would this require external adjustments. These units always work when received, so I am unfamiliar with the required troubleshooting.

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