AlexUT

Hi bender, I recommend you to start from Data Tables Webinar: http://www.unitronics.com/Content.aspx?page=datatables Please note, you can exchange data between SD card and Data Table at OPLC: -Use Data Table functions; -Use SD Data Table functions; -Note that the main DT folder and subfolders DT1, DT2, DT3, DT4 can each contain 64 files, for a total of 320 .udt files. This way you can handle up to 320 files on SD card. You can then read information from SD files to OPLC memory. You can use also SD function Block Read/Write , but it seems a little more complicated. Answer may be more specific if you provide more information about your project requirements.

Hi julle, I recommend you start from Examples of Visilogic. Shortest way to open Examples is to go to "Help->Examples...) menu option. Then go to "Version 900->Project examples" directory. "V280_ON_off_control_with_hysteresis_and_high_and_low_alarms.vlp" project was written for heating control with hysteresis. This project will be adopted to control Pump. "V120_Variable_enter_control.vlp" project is a simple example fo Variable entry control. I hope this answers your questions.

Hi Clive, To get the most accurate measurement we highly recommend to use 3-4 wire RTD sensor. Using 2 wire sensor may lead to very unstable (sensitive to noises) and un-precise (affected by wire impedance) reading. If anyway you have two wire RTD sensor, you need to connect one of the wires to T+ and T- (both have PT label as well) and the second wire connect to CM. You need to define selected input as PT100 in hardware configuration in accordance to used PT100 type (alpha=0.0385 or, alpha=0.0392) assign MI and select C(celsius) or F. Then you will see in assigned MI raw number, which is 10xt. Example: you see raw number 247. Temperature is 24.7 C. When MI = 32767 Sensor is not connected to input, or value exceeds permissible range, or sensor is different than PT100 (for example, PT1000). When MI = -32767 Sensor is short-circuited

Hi Manville, Do you have any fan driver or just fan with two wires? What is a fan current? To drive a fan voltage, you need additional driver, as an analog inputs and output of M90-TA2-CAN is 0-10V. Analog output have 1Kohm minimum load impedance. This means that the max current you can obtain theoretically at 10 V is 10 mA. Seems far below the one you need to drive any kind of fan motor. *Digital Output have current limit 0.5A, but you need realise PWM, as Joe say. Be more specific with your specifications, then answers will be fastest and more specific as well. Best regards, Alex.