User manual OMRON E5 GETTING STARTED

[. . . ] H08E-EN-01 E5CN E5AN E5EN E5GN ZX-T Series Digital Temperature Controllers Getting Started Manual E5CN/E5AN/E5EN/E5GN Digital Temperature Controllers Getting Started Manual Basic Type Revised August 2010 This manual needs the H04E+E5CN(-U) and H03E+E5EN/AN datasheet for selection and installation. (This manual is a selection from the full manual H156) iv Preface The E5CN, E5CN-U, E5AN, E5EN, and E5GN are Digital Temperature Controllers. The E5CN and E5CN-U are both compact temperature controllers, with the E5CN featuring screw terminal connections, and the E5CN-U featuring socket pin connections. The E5GN can be connected using screw terminals or screwless clamp terminals. [. . . ] Select the PID ON/OFF parameter by pressing the M Key. 4. Check that the set value is onof (i. e. , the default). To return to the operation level, press the O Key for at least one second. Next, set the set point value. Setting the SP Operating Procedure Operation Level C In this example, the set point is set to 200. The set value (i. e. , the SP) is shown at the bottom of the display. Select the Process Value/Set Point parameter in the operation level. 25 100 PV/SP C 25 200 2. (In this example, it is set to 200. ) The new set value can be saved by pressing the M Key, or it will go into effect after two seconds have elapsed. Next, set the hysteresis. 41 Determining PID Constants (AT, ST, Manual Setup) Setting the Hysteresis Operating Procedure Operation Level C Section 3-8 Set the hysteresis to 2. 0°C. Press the O Key to move from the operation level to the adjustment level. 25 200 PV Adjustment Level 1. adj C Adjustment Level Display 2. The Adjustment Level Display parameter will be displayed in the adjustment level. hys 1. 0 Hysteresis (Heating) 3. Select the Hysteresis (Heating) parameter by pressing the M Key. C hys 2. 0 4. Press the U and D Keys to set the hysteresis (2. 0 in this example). Either press the M Key or wait for at least two seconds after setting the hysteresis value to confirm the setting. To return to the operation level, press the O Key. 3-8 3-8-1 Determining PID Constants (AT, ST, Manual Setup) AT (Auto-tuning) at · When AT is executed, the optimum PID constants for the set point at that time are set automatically. A method (called the limit cycle method) for forcibly changing the manipulated variable and finding the characteristics of the control object is employed. · Either 40% AT or 100% AT can be selected depending on the width of MV variation in the limit cycle. In the AT Execute/Cancel parameter, specify at-2 (100% AT) or at-1 (40% AT). · Only 100% AT can be executed for heating and cooling control. · AT cannot be executed when control has stopped or during ON/OFF control. · The results of AT are reflected in the Proportional Band (P), Integral Time (I), and Derivative Time (D) parameters in the adjustment level. Adjustment Level C (0 p i d Proportional Band Integral Time 233 Derivative Time 40 42 Determining PID Constants (AT, ST, Manual Setup) AT Operations Section 3-8 AT is started when either at-2 (100% AT) or at-1 (40% AT) is specified for the AT Execute/Cancel parameter. During execution, the AT Execute/Cancel parameter on the No. When AT ends, the AT Execute/Cancel parameter turns OFF, and the No. [. . . ] Select the Set Point Lower Limit parameter in the initial setting level. sl-l -200 Set Point Lower Limit C sl-l -100 2. Use the U and D Keys to set the parameter to -100. 4-7 4-7-1 Using the SP Ramp Function to Limit the SP Change Rate SP Ramp The SP ramp function is used to restrict the width of changes in the set point as a rate of change. When the SP ramp function is enabled and the change width exceeds the specified rate of change, an area where the set point is restricted will be created, as shown in the following diagram. During the SP ramp, control will be performed not for the specified set point but rather for the set point restricted by the rate of change set for the SP ramp function. SP SP after change SP ramp SP ramp set value SP before change Point of change SP ramp time unit (s/min) Time The rate of change during SP ramp is specified using the SP Ramp Set Value and SP Ramp Time Unit parameters. [. . . ]