- What device to use to get values form a Modbus device in to TAC Vista
- Get data from Modbus meter to BMS system running Vista.
TAC Xenta server 731/913
TAC Vista can not talk Modbus directly so you need to use a gateway controller.
Xenta firmware version 5.1.4 and earlier only two controllers had Modbus communication capabilities:
- Xenta Server 731 For details see
TAC Xenta 711/731 Web Server and Controller
- Xenta Server 913 For details see
TAC Xenta 913 LonWorks Gateway
Starting with Xenta firmware version 5.1.5, all Xenta Servers are now capable of communicating on a Modbus network both via TCP/IP and RS-485. This includes Xenta 511, 527, 701, 711, 721, 731, 913.
Note: Older Xenta Server devices built before firmware 5.1.5 have the capability of using Modbus over RS-485 once they have been upgraded even though the terminals are not labeled on the device. For information on how to wire these devices reference a newer Xenta Server that does have the RS-485 A terminals labeled or see Lessons Learned #4994.