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About ylle

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  1. Hi, This motorized valves are in district heating boilerhouse. Im using Belimo actuators DGR230A-7, with no feedback potensiometer, but with auxiliary switches for series- connection (as it is seen in File 2). Im using Unitronics V1040 and I want to use one PID to control outgoing temperature. 1. Is this a closed loop hydronic heating system in which the temperature and pressure changes of the returning water are slower but heat load can be radically different? - Yes, this is a closed loop heating system, there is a pump which keeps pressure difference between IN&OUT (e.g OUT 3,5
  2. Hi, I have to make logic were one PID loop controls two series-connected valves (look File 2). In logic, PID SP is temperature what comes from dynamical graph (depend on the external air temp), PV is outgoing temperature (after valves), PID CV is used to activate PLC relay outputs- OPEN, CLOSE (look File 1) There is no feedback from valves, from technical data is known that OPEN position to CLOSE position takes 150 sec (both valves are same type). Actions: 1. If its needed to raise water temperature, then its activated OPEN output, which is linked to valve "Direct" (look File 2, 11GM
  3. Hi. My V350 is communicating with Modbus device. It`s quite simple becose almost all Modbus device registers are 16-bits, I have to worry about were to but comma in MI-s. But im confiused about two register. In Modbus device manual there are notes about those register and i dont know do I have to swap or just directy store those 16-bits registers into DW or ML; or make same mathematical operation... Registers are: Register number Modbus aaddress Parameter Received data scale Units Notes 40001 0 Total low 1
  4. Hi, I have OPLC V350-35-TA24 what includes onboard I/Os and configurable via wiring 2 Analog, 2 PT100/TC, and 1 HSC/ Shaft-encoder Input. So, first, i made changes in hardware project where analog input 2 and 3 were 0-10V, I connected them with potensiometer (i used voltage divider, so to analog input went 0,33-11,5 VDC, pot supply camed from same supply as OPLC +24VDC, pot signal went to analog input, pot ground went OPLC 0V). I also changed jumper setting, input 5 (analog input 3) - JP4 B, JP10 A, input 6 (analog input 2) - JP8 B, JP9 A. I made new project were was only linearization b
  5. HI! In our project computer are programs M90 Data Centre, DataXport (version 3.1.0 (DB107)) and for calling out through analog phoneline APACHE HCF V.90 56K Data Fax Voice Speakerphone PCI Modem, connected to PC - COM 3 and NOKIA MOBILE PHONE 30 DATA/FAX (GSM), connected to PC - COM 1. Computer is using Windows XP. M90 Data Centre is working very well with APACHE PCI modem but problem is with DataXport. I tried to use in DataXport also APACHE PCI modem but it wasent possible. I did all needed settings DataXport windows PC ports (COM 1, PSTN modem, type APACHE, baud rate 9600, dial type Tone)
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