Manuale d’uso / di manutenzione del prodotto SJ 300, L100 300 del fabbricante Hitachi
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HAL100PID HITACHI INVERTER PID CONTROL USERS ’ GUIDE After reading this manual, keep it for future reference Hitachi America, Ltd. SJ/L100/300 SERIES.
SJ100/L100 / PID / 2 CONTENTS 1. OVERVIEW 3 2. PID CONTROL ON SJ100/L100 INVERTERS 3 2-1 PID Control 3 (1) P : Proportional Control 4 (2) I : Integral Control 5 (3) D : Differential Control 5 (4) PID Control 5 2-2 PID Gain Adjustments & Control Characteristics 6 3.
SJ100/L100 / PID / 3 1. OVERVIEW SJ100/L100 series inverters have an integrated PID control function as standard. They can be used for controls, such as constant flow control for fan & pump applications, and they have the following features.
SJ100/L100 / PID / 4 SJ100/L100 series inverters have integrated PID control, which is indicated by the dotted line in Fig. 2-1. You can use PID control by setting a target value and providing a feedback signal. The example in Fig. 2-2 shows a connection diagram for ventilation flow control in a fan application.
SJ100/L100 / PID / 5 (2) I: Integral Control This is a control to correct the output frequency by integrating the deviation. In the case of proportional adjustment, a large deviation will result in a large output frequency adjustment, but if the deviation is small, then the resulting adjustment of output frequency will also be small.
SJ100/L100 / PID / 6 2-2 PID Gain Adjustments & Control Characteristics The optimal gain factors of PID vary from condition to condition, and from system to system. That means it is necessary to set those parameters by taking into account the individual control characteristics of your particular system.
SJ100/L100 / PID / 7 3. HOW TO USE 3-1 Structure & Parameters (1) Control Mode Integrated operator A71 : 00 / 01 DOP, DRW F43 : PID SW ON / OFF SJ100/L100 series inverters feature the following two control modes: l Frequency control mode l PID control mode These can be selected by “ PID function selection (A71) ” .
SJ100/L100 / PID / 8 (3) Deviation Calculation Every calculation in PID control in the SJ100/L100 is based on “ % ” so that it can be used with various applications and units of measure, such as pressure (N/m 2 ), flow (m 3 /min), temperature (degrees) and so on.
SJ100/L100 / PID / 9 As you can see from Fig 3-3, if you set parameters A11 and A12 other than “0”, you should set the target value inside the valid range of the vertical axis. Otherwise it is not possible to achieve stable performance because there is no feedback value.
SJ100/L100 / PID / 10 3-2 Summary of Parameters for PID Control On the SJ100/L100 series inverters, the same function numbers are used for both frequency control mode and PID control mode. The function name for each function is based on frequency control mode, which is normally used for general application.
SJ100/L100 / PID / 11 3-3 Example of Set Up (1) Parameter Set Up under Frequency Control Mode Before driving the system in PID mode, you set up each required parameter under frequency control mode. Pay particular attention to the following items. l Acceleration ramp and Deceleration ramp The output of the PID calculation (refer to Fig.
SJ100/L100 / PID / 12 (3) Scale Conversion Factor Setting Set this factor according to your application, e.g. flow, pressure, temperature and so on. For a detailed explanation, please refer to item (6) on page 9.
SJ100/L100 / PID / 13 3-4 Example of Each Gain Adjustment ( K p & T i ) l Check the response of feedback signal or the output frequency of the inverter when making a step change in the target.
SJ100/L100 / PID / 14 4. EXAMPLE OF ACTUAL APPLICATION You can find in this chapter some typical setting examples for actual applications. 4-1 Constant Flow Control In this case (targets are 150m 3 /m.
SJ100/L100 / PID / 15 4-2 Constant Temperature Control In the case of constant flow control shown in the previous section, output frequency of the inverter increases if the feedback value is smaller than target value, and output frequency of the inverter decreases if the feedback value is bigger than the target value.
SJ100/L100 / PID / 16 5. INDEX - A - - R - acceleration ramp 11 response 6 AVR function 13 - S - - C - scale conversion 9 control mode 7, 10 steady state deviation 6 - D - - T - damped oscillation 6 t.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Hitachi SJ 300, L100 300 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Hitachi SJ 300, L100 300 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Hitachi SJ 300, L100 300 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Hitachi SJ 300, L100 300 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Hitachi SJ 300, L100 300, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Hitachi SJ 300, L100 300.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Hitachi SJ 300, L100 300. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Hitachi SJ 300, L100 300 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
