Reliable MACH-ProComm Device Limit
Does anyone know what the maximum amount of MS/TP devices is that I can hang off a MACH-ProComm? The documentation appears to be confusing, and eludes to a 'subnetwork' of MS/TP.
It seems I can hang up to a max of 125 devices on the Main MS/TP network. Can I put more on there or is that the limit?
As I recall 125 is the limit, there also in a physical wiring limitation which is 4,000 feet . 125 elements on a single 4,000 foot bus sounds kinda scary.
Any MachProComm can be configured to use the spare rs-485 port as to create a subnet with another 125 elements, (125 x 125 = 15,625 elements in theory). If you have more then say 50 I'd recommend that because it segments the bus communication keeping it cleaner and faster.
Do you mean the Auxillar IO port can be changed to MSTP? I guess this is different than the ProSys, which reserves that port for Expandable IO devices...
The Mach-ProCom aux com port can be configured as:
2) Bacnet Sub B - MSTP
3) RCP Sub B
You need version 2 or higher of RC Toolkit.