Results 1 to 4 of 4
-
03-23-2009, 08:36 PM #1
Regular Guest
- Join Date
- Oct 2005
- Posts
- 82
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?
-
03-25-2009, 01:16 AM #2
Regular Guest
- Join Date
- Dec 2008
- Location
- sf bay area calif
- Posts
- 57
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.
-
03-25-2009, 08:39 AM #3
Regular Guest
- Join Date
- Oct 2005
- Posts
- 82
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...
-
03-25-2009, 10:20 AM #4
Regular Guest
- Join Date
- Dec 2008
- Location
- sf bay area calif
- Posts
- 57
Correct,
The Mach-ProCom aux com port can be configured as:
1)I/O Port
2) Bacnet Sub B - MSTP
3) RCP Sub B
4 Modbus
You need version 2 or higher of RC Toolkit.
Reply With Quote