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VT6 AIR

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USER MANUAL MITOS VT6 AIR
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    USER MANUAL MITOS VT6 AIR release software 3.1   2 / 17 Summary: GENERAL DESCRIPTION ............................................................................................................................................. 3   GENERAL FEATURES ................................................................................................................................................... 3   FUNCTIONING PARAMETERS .................................................................................................................................... 4   MITOS VT6 AIR FUNCTIONING MODE ..................................................................................................................... 7   FUNCTIONING  JUST DISPLAY   ..................................................................................................................................... 7   MANUAL FUNCTIONING ............................................................................................................................................. 8   AUTOMATIC FUNCTIONING (PID CONTROL) ......................................................................................................... 9   PRESSURE / VELOCITY / FLOW RESET .................................................................................................................. 11   RESET INVERTER ALARM ........................................................................................................................................ 11   SELECTION OF SERIAL COMMUNICATION TTL/RS485 ...................................................................................... 11   CONNECTION FOR PRESSURE MEASURE / REGULATION ................................................................................. 12   CONNECTION FOR FLOW OR VELOCITY MEASURE/REGULATION ................................................................ 14   MECHANICAL DIMENSIONS .................................................................................................................................... 15   APPENDIX ..................................................................................................................................................................... 16     3 / 17 GENERAL DESCRIPTION MITOS VT6 AIR  is a measure, visualization and control device for pressure, velocity and flow. It has got a differential  pressure sensor with a +/-999mmH 2 O +/-1% F.S. range and a temperature sensor (internal). The precision of the  pressure measurement is optimized by the compensation in function of the temperature. It is equipped with 6 buttons and 1 LCD 16x2 lines display (2 lines and 16 fonts each line). It is also programmable by a menu. The control is done by a VF-S11, VF-FS1, VF-AS1 or VF-PS1 Toshiba inverter, using a simple TTL serial connection (VF-S11 inverter) or RS485 (VF-FS1, VF-AS1, VF-PS1 inverter) and it can be manual or automatic. The selection of the type of serial connection can be selected by a dip-switch placed on the back of the box. Manual control allow to command run/stop and/or the inverter frequency. The frequency sent is fixed and is  programmable from the display menu. Automatic control commands run/stop and also regulate the frequency sent to the inverter in order to keep the pressure, velocity or flow (selectable) at a fixed level, programmable from the display menu. Automatic control uses a PID regulation characterized by proportional, integrative and derivative parameters, changeable from the programming menu. MITOS VT6 AIR can also visualize some functioning parameters of the inverter, such as current and power delivered, input and output voltage, frequency, hours of functioning, historic of the last four alarms. Available scales for pressure, velocity and flow are: Pressure: mmH 2 O; mbar; Pascal; Kpascal. Velocity: second meter Flow: hundreds of cube meters per hour; cube meters per second; litres per second. GENERAL FEATURES MITOS VT6 AIR has got the following features Case : Material: ABS. IP55 protection degree Alimentation : The alimentation is directly taken by the inverter through the serial connecting cable Working temperature : From -5 to +50 °C Box dimensions : 120 x 65 x 35 mm. Weight : 350g. Input : 1 differential pressure gauge with +/-999mmH 2 O +/-1% F.S. User interfaces : Monocromatic graphic display 2x32 types, 6 buttons (START, MAN/AUTO, UP, DOWN, MON, STOP/RESET)   4 / 17 FUNCTIONING PARAMETERS The parameters programming menu is accessible in the normal functioning menu, by pushing MON button for at least 3 seconds. After the 3 seconds, it is necessary to insert a password. With UP and DOWN, you can change the number referred to the password, between 0 and 999. Once set the correct value, press MON to confirm. Each wrong password value allows to view just a part of the available parameters, the first eight in the following pattern. In the programming menu, you can select the parameter with the buttons UP and DOWN. Then, when the parameter is selected, the  parameter will flash pressing the button MON. Value can be changed through buttons UP and DOWN. To store the new value, you need to press again MON (the parameter stops flashing). To quit the programming menu, just press MAN/AUTO. Here follow all the functioning parameters of MITOS VT6 AIR. PARAMETER FUNCTION POSSIBLE VALUES Hysteresis If the PID control is enabled, this act only if: V > Set point PID + Hysteresis or V < Set point PID - Hysteresis  where V is the value measured by the controlled variable min = 0; max ( 2 ) appendix Constant PID Kp PID control proportional constant 0.0 ÷ 300.0 Constant PID Ki PID control integrative constant 0.0 ÷ 300.0 Constant PID Kd PID control derivative constant 0.0 ÷ 300.0 ACC manual Value of the ACC parameter sent to the inverter when Type command   = MANUAL. 0.1 ÷ 320.0 sec.   DEC manual Value of the DEC parameter sent to the inverter when Type command   = MANUAL. 0.1 ÷ 320.0 sec.   ACC automatic Value of the ACC parameter sent to the inverter when Type command   = AUTOMATIC. 0.1 ÷ 320.0 sec.   DEC automatic Value of the DEC parameter sent to the inverter when Type command   = AUTOMATIC. 0.1 ÷ 320.0 sec.   Mode MITOS VT6 AIR can be used as a simple display, but it can also send run and/or frequency variation commends to the Inverter COMMAND VISUALIZATOR Rotation sense Sense of engine rotation AHEAD BACK Feedback Type of variable where the control PID is  performed PRESSURE VELOCITY FLOW Pressure unit Pressure Unit of measurement mmH 2 O Pa kPa mBar Flow unit Flow Unit of measurement m 3 / h (value per 100) m 3  / s l / s Velocity unit Velocity Unit of measurement m / s PID Set point Set the set-point of the variable where the PID control is performed min = 0; max ( 2 ) appendix PID Type Type of PID control PID proport.-integr.-derivat. PI proport.-integr. P proportional PD proport.-derivat.
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