7/16/2016 11:04 AM | |
Posts: 200 Rating: (6) |
Hi Have tried some of these examples in the help section under Boiler control. |
7/16/2016 11:43 AM | |
Posts: 5225 Rating: (1192) |
£56.5 / hour |
7/17/2016 4:43 AM | |
Posts: 124 Rating: (13) |
Hello Liever, Take o look. Operation in automatic. Only one bottom to start and stop. One flag by heater. In case of fault all the heaters will to state "1", step by step according the timer. After start, all time with four heaters. Case to analyse: when group (M1, M2, M3 and M4) are working, the time is larger then another group, for example (M2, M3, M4 and M5). I think that is a little dificult to solve using two Shift Register because we have a arithimetic ratio 6:8 or 3:4. Regards. AttachmentAutomatic heating 16 07 2016.zip (336 Downloads) |
Last edited by: Dinos at: 7/17/2016 5:05:46 AM |
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This contribution was helpful to1 thankful Users |
7/17/2016 11:12 PM | |
Posts: 124 Rating: (13) |
Hello Liever, I took in count four basic things: no simultaneity start, four heater in "1" condition, identical switching time and automatic operation. As the operator need to start and stop each heater, you must consider as follow: each marker permits the operator to control each heater. There are two options: 1. The operator can start and stop each heater exclusively during the marker interval. 2. The operator can start the heater during the marker interval and stop at the finish of process. I think that second option is more appropriate: when begining a process it must to go until its final. See options. Regards, AttachmentAutomatic heating complement 17 07 2016.zip (325 Downloads) |
7/18/2016 6:03 PM | |
Posts: 13 Rating: (0) |
Hello Dinos In regard of your last post 1. Any heater can be started as the first, because, for example M5 is ready to begin the process. The operator don't need wait for his time. Agreed :The sequence of the start up of the cooking procedure isn't that important. The operator has only a start and stop button for each heater . Also an emergency button is included for all 6 heaters. When the operator pushes start for heater 1 , I1 is high .When he pushes stop I2 is low. When he pushes the emergency button ,all the PID regulators are off .Q1 makes or brakes the output of PID1 . This has been already executed (See attache image) 2. A second heater begins the process after a time from the first one, for example, M3. I think this interval is necessary for eletrical reason. If not, it can be done without interval. Agreed : this is a nice feature 3. And the third and fourth heater follows this procedure. They can be, for example M6 and M1. Agreed 4. When four heaters is working, the next heater will wait until one of the four in process stops. Here we have eletric reason (current). Agreed : When four heaters are working and there is demand of 5 (I1 - incl -I5 are high) , they should alternate between them 5 . When I6 is high , they should alternate between them 6. The kettles should alternate when more than 4 inputs are active. They should alternate accordingly the inputs . I think we might need a new program Regards AttachmentIMG.pdf (317 Downloads) |
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