T8191 ICS TRIPLEX
Description
The IRIG time source needs to be set up to output the same IRIG code as the TMR Processor is set up to receive. Some IRIG sources will output IRIG-B002 as TTL levels. This will not work with the TMR Processor, so ensure that the IRIG source is set to IRIG-B002 at 485/422 levels. Some IRIG sources will have IRIG-B123 or B003 outputs. These have the time encoded in Straight Binary Seconds (SBS) at the end of the usual B122/002 message. These can be used with the TMR Processor because it ignores the SBS part of the message if there is one. With the TMR Processor and the IRIG source set correctly, the time should be updated from the IRIG source once the module has booted. If the TMR Processor is not decoding the IRIG signal correctly for whatever reason, the System Health LED will flash red and the following will appear in the MP log: 48 IRIG: Maximum update interval exceeded Typing IRIG S from the MP diagnostics will list the status of the IRIG Port.