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Operation 4.7 Optimization of the control data The data automatically determined during initialization for control quality are optimized for short duration commands with small overshoots. In special cases (e.g. extremely small and specially quick actuators or when operating with boosters) it can however occur that these data need to be revised to achieve quick responses or heavy damping. The following six parameters are available for this purpose: 13 Pulse length up This determines for any sense of actuation the smallest drive move- pulse length. The optimum value is dependent particularly on the 14 Pulse length downment volume of the drive.Small values will lead to small actuation increments and frequent control drive activations. Note that if the value is too small no movement will result. If drive volumes are large, then it is better to use larger actuation increments. Note also that large actuation increments will still lead to large movements for small drives. 17 Short step zone up 18 Short step zone down The short step zone is the range in which the control variation between the fast step zone and the dead band. In this zone the drive is activated in pulses. If the value is small, even small changes of setpoint will evoke relatively large positioning speeds and can thus lead to overshoots. If the value is large, the overshoots will be reduced, particularly on large changes of setpoint but will lead to slow positioning speeds, particularly as the target setpoint is approached closely. 34 Prediction up 35 Prediction down These parameters operate on the damping factor and have the effect of adjusting the control dynamics. If the value is small, responses will be quick but with overshoots. If the value is large, response will be slow but without overshoots. It is recommended that the firstly an automatic initialization is performed and only thereafter that the positioner parameters are matched to any special requirements. TIP: So as to have a fixed reference value, it is advantageous for special control optimization to set a fixed value for the dead zone (parameter DEBA) instead of ”Auto”. The above parameters are usually selected from the diagnostics menu and activated for general adjustment by pressing the increment or decrement key. Any adjustment to a parameter will be immediately effective. This means the effect of the new values on the control results can be immediately tested. On leaving the diagnostic menu the activation of the parameter for adjustment will be deactivated again. 110 SIPART PS2 Manual A5E00074631-03
Care and Maintenance Service and Maintenance 5 The positioner is largely maintenance--free. The positioners are fitted with filters in the pneumatic connections as protection against coarse particles of dirt. If the pneumatic energy supply contains particles of dirt, the filters may clog and impair the function of the positioner. In this case the filters can be cleaned as follows. Positioner in metal housing and explosion proof version 1. Switch off the pneumatic power supply and remove the pipes. 2. Remove the metal filters carefully from the holes and clean (e.g. with compressed air). 3. Insert the filters. 4. Re-connect the pipes and supply pneumatic energy. Positioner in plastic housing Removal 1. Switch off the pneumatic power supply and remove the pipes. 2. Unscrew the cover 3. Remove the three screws from the pneumatic connector strip. 4. Remove the filters and O-rings behind the connector strip. 5. Clean the filters (e.g. with compressed air). Installation 6. First insert the filters in the recesses in the plastic housing and then place the O-rings on the filters. 7. Align the pneumatic connector strip on the two lugs and screw tight with the three self--tapping screws. Important: Make sure that the same thread is used. To do this turn the screws counterclockwise until they snap into the thread audibly. Only then should you tighten the screws. SIPART PS2 Manual A5E00074631-03 111
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Manual Edition 07/2003 sipart ps2 E
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Copyright e Siemens AG 2000 All rig
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3.4.2 Connection in intrinsically s
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Information for the Operator This m
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Information for the Operator ! WARN
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Introduction Degree of protection E
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Introduction 1 2 4 3 1 Actuator 2 P
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Design and Functional Principle put
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Design and Functional Principle 2.2
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Design and Functional Principle Pos
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Design and Functional Principle 1 B
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Design and Functional Principle 5.
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Design and Functional Principle 6 1
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Design and Functional Principle The
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Design and Functional Principle 34
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Preparing for Operation 90 14 3x G1
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Preparing for Operation . NOTE The
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Preparing for Operation Assembly of
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Preparing for Operation 3.3.3 Mount
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Preparing for Operation 2 17 16 12
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Preparing for Operation 3.3.6 Assem
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Preparing for Operation 15 14 4.2 9
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Preparing for Operation fastening B
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Preparing for Operation . NOTE Use
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Preparing for Operation Current out
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Preparing for Operation Non-hazardo
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Preparing for Operation Current out
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Page 64 and 65: Preparing for Operation SIA module
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Page 68 and 69: Preparing for Operation 3. Switch o
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Page 72 and 73: Preparing for Operation The first l
Page 74 and 75: Preparing for Operation The initial
Page 76 and 77: Preparing for Operation 3.6.7 Autom
Page 78 and 79: Preparing for Operation 2 set lever
Page 80 and 81: Preparing for Operation 3.7 Copying
Page 82 and 83: Operation Figure 4-1 Meaning of the
Page 84 and 85: Operation 4.3 Operating modes The p
Page 86 and 87: Operation Manual 4-1 mode In this o
Page 88 and 89: Operation The following configurati
Page 90 and 91: Operation . NOTE After ”LWAY, ncS
Page 92 and 93: Operation y=x 100 % Positioner 1 6.
Page 94 and 95: Operation The setpoint vertex value
Page 96 and 97: Operation 40.YCDO 41.YCUP Value for
Page 98 and 99: Operation 48. TIM 49. LIM 50. STRK
Page 100 and 101: Operation 4.5 Diagnosis 4.5.1 Diagn
Page 102 and 103: Operation 4 A1CNT 5 A2CNT Alarm cou
Page 104 and 105: Operation 31 VENT1 32 VENT2 Number
Page 106 and 107: Operation Error Event code 1 Remain
Page 108 and 109: Operation 8 Monitoring of the dead
Page 110 and 111: Operation Upper line Lower line Mea
Page 114 and 115: Care and Maintenance 8. Replace the
Page 116 and 117: Technical Data ■ Technical data S
Page 118 and 119: Technical Data ■ Technical data (
Page 120 and 121: Technical Data ■ Technical data (
Page 122 and 123: Scope of delivery 7.1 Ordering data
Page 124 and 125: Scope of delivery 7.4 Scope of deli
Page 126 and 127: Index Installation positions, favor
Page 128 and 129: Appendix 9.2 Certificates 9.2.1 EC
Page 130 and 131: Appendix 9.2.3 EC Type-Examination
Page 132 and 133: Appendix 130 SIPART PS2 Manual A5E0
Page 144 and 145: Appendix 9.2.6 FM Approval Report (
Page 146 and 147: Appendix 9.2.7 FM Approval Report 1
Page 148 and 149: Appendix 9.2.8 CSA Certificate of C
Page 150 and 151: Appendix 9.2.9 Control Drawing A5E0
Page 160: Appendix 158 SIPART PS2 Manual A5E0
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