Today is...
Saturday, February 16, 2019
Welcome to Control.com, the global online
community of automation professionals.
Featured Video...
Featured Video
Watch an animation of a conveyor stacking operation demonstrating the use of a move on a gear command.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
TOTEM Finite State Machine Information - Reading from a Input Register
I have been given a datasheet for a CHP unit. I am looking how I can get the multistates?

Hello,

I have a AO Smith / TOTEM CHP Unit, and we are interfacing with TCP/IP Modbus. I have all the values I would like to pick up (Flow & Return, Hours run etc) but there is a section named TOTEM finite state machine information. The input register is number 38 but it looks like a BACnet multistate module, but unable to use these in Modbus?

Here's an example


(State)
#3 - Engine Starting

(Step)
#1 - Fault Check
#2 - IEEE waiting time when the mains if off
#3 - Reset step motor position


How can I read these? I am using OpenSystem Solutions Broadsword. I have the options to send it an offset, slave, format & scale and readback an analogue output.