model 2704 controller installation and operation handbook - Soliton

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Loop Set Up 2704 Controller 9.7.2. Commissioning the Motorised Valve Controller 1. Measure the time taken for the valve to be raised from its fully closed to its fully open position and enter this as the value in seconds into the ‘Travel Time’ parameter. 2. Set all the other parameters to the default values shown in 9.7.1. The controller can then be tuned using any of the automatic, or manual, tuning procedures described in Chapter 8. As before, the tuning process, either automatic or manual, involves setting the values of the parameters in Table 9.7.1. The only difference with boundless control is that the derivative term, although present, will have no effect. 9.7.2.1. Adjusting the minimum pulse-time The default value of 0.2 seconds is satisfactory for most processes. If, however, after tuning the process, the valve activity is excessively high, with constant oscillation between raise and lower pulses, the minimum on-time can be increased. The minimum on-time determines how accurately the valve can be positioned and therefore the control accuracy. The shorter the time, the more precise the control. However, if the time is set too short, process noise will cause an excessively busy valve. 9.7.2.2. Inertia and backlash settings The default values are satisfactory for most processes, i.e. ‘Off’. Inertia is the time taken for the valve to stop after the output pulse is turned off. If this causes a control problem, the inertia time needs to be determined and then entered into the ‘Inertia’ parameter. The inertia time is subtracted from the raise and lower output pulse times, so that the valve moves the correct distance for each pulse. Backlash is the output pulse time required to reverse the direction of the valve, i.e. the time taken to overcome the mechanical backlash of the linkages. If the backlash is sufficient to cause a control problem, then the backlash time needs to be determined and then entered into the ‘Backlash’ parameter. The above two values are not part of the automatic tuning procedure and must be entered manually. 9-16 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00
2704 Controller Loop Set Up 9.8. OUTPUT PARAMETERS Table Number: 9.8. This list allows you to set up the parameters which control the control output to the plant LP1 SETUP (Output Page) Parameter Name Parameter Description Value Default Access Level Loop Mode OP Low Limit OP High Limit OP Rate Limit On/Off control output only. Allows the controller to be switched into manual Sets a low limit on an analogue output signal Sets a high limit on an analogue output signal Sets the rate at which the output value changes Auto Manual -100% to 100% -100% to 100% Off to 99.99 %/sec OP Rate Lim En Output rate limit enable Off On Forced OP SBrk OP CH1 OP Ch1 Hysteresis Sets the output value when the controller is switched to manual - alternative to bumpless transfer Sets the level of the output under sensor break conditions Reads the current value of channel 1 output Only shown if the output relay 1 is configured as on/off. It sets the difference between relay on and relay off. Ch1 Min Pulse Output minimum on time (on/off control) The above three parameters are repeated for channel 2 Deadband Deadband between ch1 and ch2 - only applies if both ch1 and ch2 are configured -100% to 100% -100% to 100% -100% to 100% Off to 9999.9 Off to 100.0 Target OP Target output power -100 to 100% Rem Lo OP Lim Remote low power limit -100% to 100% Rem Hi OP Lim Remote high power limit -100% to 100% Auto Off L1 L3 L3 L3 L3 L3 L3 R/O L3 L3 L1 L3 L3 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 9-17
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2704 Controller Contents MODEL 2704
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2704 Controller Contents 5. CHAPTER
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2704 Controller Contents 7. CHAPTER
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2704 Controller Contents 9.5.1. Int
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2704 Controller Contents 13. CHAPTE
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2704 Controller Contents 18. CHAPTE
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2704 Controller Contents B. APPENDI
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2704 Controller Contents LIST OF FI
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2704 Controller Contents Figure 18-
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2704 Controller Introduction 1. Cha
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2704 Controller Introduction 1.2. W
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2704 Controller Introduction ➃
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2704 Controller Introduction 1.4.1.
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2704 Controller Installation 2. CHA
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2704 Controller Installation 2.1.3.
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2704 Controller Getting Started 3.
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2704 Controller Getting Started 3.1
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HUMIDITY INPUT OPERS TIMER BLOCKS P
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2704 Controller The Summary Page 5.
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2704 Controller Digital Programmer
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2704 Controller Digital Programmer
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2704 Controller Analogue Operators
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2704 Controller Analogue Operators
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2704 Controller Logic Operators 15.
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2704 Controller Logic Operators 15.
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2704 Controller Digital Communicati
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2704 Controller Digital Communicati
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2704 Controller Standard IO 17. CHA
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2704 Controller Standard IO 10. Pre
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2704 Controller Standard IO To set
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2704 Controller Module IO 18. CHAPT
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2704 Controller Module IO 18.3.11.
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2704 Controller Module IO 18.4. MOD
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2704 Controller Module IO [Units] I
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2704 Controller Diagnostics 20. CHA
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2704 Controller Diagnostics Note 1.
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2704 Controller Appendix A A. APPEN
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2704 Controller Appendix A B. QUICK
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2704 Controller Safety and EMC Info
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2704 Controller Technical Specifica
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model 2704 controller installation and operation handbook - Soliton

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