Hitachi SJ 300, L100 300 - Manuals

Page 2 - CONTENTS; EXAMPLES OF ACTUAL APPLICATION

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. HOW TO USE 7 3-1 Structure &am...

Page 4 - is too high, the system; Fan; Fig. 2-2 Wiring example for flow control application; K p

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...

Page 6 - -2 PID Gain Adjustments & Control Characteristics; Decrease Integration time (T

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...

Page 7 - Integrated operator; Frequency control mode; These can be selected by; Selectable by; Fig. 3-1 control block diagram of PID control; Target value display; Target

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...

Page 10 - -2 Summary of Parameters for PID Control

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 appl...

Page 11 - Acceleration ramp and Deceleration ramp; Table 3-2 How to Set Origins for Target and Feedback; Feedback

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 ...

Page 14 - EXAMPLE OF ACTUAL APPLICATION; -1 Constant Flow Control; In this case (targets are 150m; Fig. 4-1 Example of Constant Flow Control; Feedback value range setting

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 /min & 300m 3 /min), the settings would be as follows: Function Number Function Name Input Remarks...

Page 15 - -2 Constant Temperature Control; Constant Temperature Control

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 tha...