Digital Temperature Controller Reference Manual

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2.4.2.1 Paddle derivative block TECHNICAL DESCRIPTION The derivative block is the same as for the spike thermocouple. The temperature response inside the tube has a delay compared to the response outside the tube. This control loop will automatically give the necessary delay to the ramping, when the paddle derivative parameter value is greater then the spike derivative value. The inputs to the paddle derivative block are the paddle thermocouple reading and the paddle derivative parameter (in seconds). The paddle P.D. output is the sum of the derivative output and the paddle setpoint deviation (setpoint reading). The output is limited to plus or minus the proportional band value. 2.4.2.2 Paddle integral block The integral block is used to make slow adjustments to the spike setpoint to bring the paddle temperature back to the setpoint. An increase in the paddle integral parameter will decrease the amount of change in the current spike setpoint. To prevent oscillation, the setpoint change per second must not exceed the maximum cooling or heating rate of the control zone. The feedback from the spike P.D. output results in no correction, if the deviation on the spike and paddle are equal in the same direction or when the deviation on both is out of the proportional band. The inputs to this block are the difference between the P.D. outputs of the paddle and spike blocks and the paddle integral parameter (in 0.1 minutes). The feedback from the P.D. output of the spike is used to dampen the cascaded control. The paddle integral output is limited to 200 oC. The D.I. output is added to the spike setpoint calculated from the profile table, which gives the new setpoint for the spike control. DIGITAL TEMPERATURE CONTROLLER REFERENCE MANUAL 2-8
3.DTC Configuration 3.1 Introduction DTC CONFIGURATION The units that can be combined to give the desired configuration are shown in Figure 3-1. All systems have to contain the Controller Unit and the Touch Screen Display. 3.2 Diffusion furnaces All Diffusion Furnaces require a data input unit (Touchscreen or TSC-II). The Controller Unit is also required, but it must be configured according to the type of furnace to be controlled. This dependents on the number of input and outputs required. 3.2.1 Furnace with DPC The DTC Controller Unit is configured with two or four input boards and one or two output boards, giving control of up to 6 zones. Automatic Profiling and paddle control is possible if one (or two) of the input boards is placed in position E (and D). Communication to the DPC is provided by the communication board. It allows reception of temperature recipe selections from the DPC and provides temperature information to the DPC. The temperature can be ramped in each zone, either independently or under master/slave control (see section 3.4). 3.2.2 Stand-alone The DTC Controller Unit is configured with two or four input boards and one or two output boards, depending on the tube configuration (3, 5 or 6 zones). For Automatic Profiling or control on the paddle thermocouples, a board has to be placed in position ‘E’ (Figure 3-1 DTC Configurations) for the first 3 zones and position ‘D’ for the zones 4, 5 and 6. Boards for the spike are in position ‘A’ for the first three zones and ‘B’ for the next. In this configuration, the DTC controls the temperature in all zones of the furnace tube. The temperature can be ramped in each zone, either independently or under master/slave control (see section 3.4). The unit can store and run a maximum of 16 recipes. 3.2.3 Furnace with source furnace, stand-alone The DTC Controller Unit is configured with three input boards and two output boards, giving control of 6 zones (3 in the main furnace and 3 in the source furnace). Automatic Profiling and paddle control is possible if one of the input boards is placed in position E. All the zones may be automatically profiled or paddle controlled. The temperature can be ramped in each zone of the main furnace and source furnace, either independently or under master/slave control (see section 3.4). DIGITAL TEMPERATURE CONTROLLER REFERENCE MANUAL 3-1
Page 1 and 2: Digital Temperature Controller Refe
Page 3 and 4: Table of Contents TABLE OF CONTENTS
Page 5 and 6: List of figures LIST OF FIGURES Fig
Page 7 and 8: HIGH ACCURACY THERMOCOUPLE CONTROL
Page 9 and 10: 1.4 Technical Specifications MAX. N
Page 11 and 12: 2.Technical Description 2.1 Introdu
Page 13 and 14: TECHNICAL DESCRIPTION Communication
Page 15 and 16: TECHNICAL DESCRIPTION A maximum of
Page 17: 2.4.1.2 Spike integral block TECHNI
Page 21 and 22: 3.3 Conveyer furnaces DTC CONFIGURA
Page 23 and 24: 4.Installation and Calibration 4.1
Page 25 and 26: STEP 1: INSTALLATION AND CALIBRATIO
Page 27 and 28: NOTE INSTALLATION AND CALIBRATION M
Page 29 and 30: 4.3 Repair INSTALLATION AND CALIBRA

Digital Temperature Controller Reference Manual

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