Hi Guys, I’m in the process of upgrading my heating control system system that controls a Wood-Fired boiler that provides hot water for in-floor (concrete) heating. I’m now using a standalone Autonics TZN4M-BC4 PID controller that has a RTD temperature sensor and 4-20mA output driving a Johnson Controls 0..90 deg positioner that controls the air inlet damper. I’m hoping this will provide a higher degree of control and better fail-safe capability as I did have a bit of a disaster last year…
The PID controller also has a RS485 comms port that talks a limited subset of the the Modbus protocol, but enough to read the PV and read/write the SV. I’m not sure if I can get anything else as that is all the example .Net code shows. Previously I had a DS18B20 sensing the temperature at the boiler and was recording that value using temploggerd. Now that I no longer has the DS18B20, I’m wondering if there is a way to re-inject the temperature from the PID controller (if I can get it via the RS485 link using python say) and then somehow writing it into the previous (or a new) device node so it keeps being logged by temploggerd? Any suggestions? Regards Alex Shepherd Hamilton, New Zealand ------------------------------------------------------------------------------ Monitor 25 network devices or servers for free with OpManager! OpManager is web-based network management software that monitors network devices and physical & virtual servers, alerts via email & sms for fault. Monitor 25 devices for free with no restriction. Download now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
