Anyone have any experience integrating to Liebert's DS CRAC's with modbus? I'm working on a job with 12 new CRAC's and I'm running into an issue with points going to null (specifically all the numeric points) and binary points changing state without any change on the CRAC itself. I noticed this problem when we started getting compressor #2 high pressure alarms from one of the units. When the unit was checked the compressor was not tripped, and there was history of an alarm in the CRAC's memory. The problem seems intermittant and is only solved temporarily by pulling the comms card on the CRAC and plugging it back it in. I've called their monitoring tech support and they reccoemended that I call the mechanical tech support because it may be an issue of communications between the card and the CRAC's main board. The comms cards are at the latest revision level, and the main boards are not as I understand it. When I talked to the mechanical guys at Leibert they said they've never heard of the issue, and assured me that the revision level on the board is fully compatible with the revision of the comms card.