Valve-Positioner-SIPART-PS2-zm There are three keys on the positioner. Each one is described below: - Enter Key – This key is used to move between menus and to accept changes to the menu. It is also used to go between operating, manual, and menu modes. - This key is used to move down in the sub-menu selections. - This key is used to go up in the sub-menu selections. Operation Going to Menu Mode from Automatic or Manual Mode a. Press for 5 seconds and the menu mode will display. Changing a menu item a. Once you are at a menu item, use the or keys to select the sub-menu value you desire. b. Once the proper value is displayed, press the key to enter and store this value and move to the next menu item. Going back to Manual mode a. Once you are finished optimizing the menu and the positioner has been reinitialized, you exit the menu setting by pressing the key for 5 seconds. b. The display will change and you will be in manual operation. At this point you can use the or keys to move the valve trim. Going to Automatic Mode a. From the manual mode, simply press the key momentarily to get into automatic mode. Positioner will now respond to signal changes from the system. Diagnostics a. All diagnostic information can be accessed through the pushbuttons. Simply press all three buttons + + at the same time for 2 seconds to get into diagnostics. Exiting Diagnostics a. To exit diagnostics, simply press the for 2 seconds to get back to the last mode you were in. Siemens PS2 Positioner Menu Effects 1. YFCT – Actuator Type a. Turn – Only for ¼ turn valves b. Way – Best setting for linear actuators. c. LWay – This will also work for linear actuators, but is not as accurate as Way. 2. YAGL – Angle Setting a. 33º - This is used for any stroke of less than 20mm. b. 90º - This is used for any stroke of 20mm or greater. c. NOTE!!! Ratio selector bar must match programmed setting. 3. YWAY – Stroke Range (Optional) a. This menu allows you to designate the stroke length. Years of experience show that by specifically setting a distance here, you can introduce errors into the initialization routine. It is always best to leave this setting on OFF. 4. INITA – Automatic Initialization a. By pressing the ‘+’ key for 5 seconds, you can start the automatic initialization. This is the best way to initialize the positioner. Make sure before running this that you have changed all desired menu options. 5. INITM – Manual Initialization a. This is used for valves without hard stroke stops. At this point none of our products fall into this category. This feature should not be used. 6. SCUR – Range Designation a. 0 mA – Use this setting for systems that run on 4 wire and have a 0-20 mA output from the system. Note – If using this setting you must have a power supply wired to the positioner. Otherwise the positioner will turn off at any signal less than 3.8 mA. b. 4 mA – This is the standard setting and the one that should be used for all of our products. This allows for two wire power and a 4-20 mA signal. 7. SDIR – Setpoint Direction (Action) a. This should be set per the customer requirements. This option changes the way the valve responds to a signal change. 8. SPRA – Start of Split Range a. This setting is used to signify the starting point of a split range valve. If this were the second stage (12-20 mA), you would set this at 50% to start moving at 12 mA of signal. 9. SPRE – End of Split Range a. This setting is used to signify the end of the split range signal. If this were the first stage (4-12 mA), you would set this at 50% to signify that the range would go from 4 mA to 12 mA. 10. TSUP – Ramp Up a. This setting is used to slow down the valve response. This setting can dramatically decrease the speed at which the positioner moves the valve trim. This setting is very powerful. It allows you to go from 0.0 to 400 in seconds. This setting controls the up stroke speed. 11. TSDO – Ramp Downa. This is the same as #10. This is used to slow down the downward stroke. 12. SFCT – Characteristic a. Lin – The linear default yields a rough linear response to a change in signal. In general, this setting will keep the trim slightly above an ideal position. This works fine for general applications, but in critical applications, it is better to use the freely settable characteristic based on linear. b. EP – This yields an equal percentage characteristic when set. Rarely used and has three options. c. N-EP – This yields an inverse equal percentage, or results in a quick opening type of response. Never used and also has three options. d. Free – This setting yields the most accurate response from the positioner. Set it for a true linear (default values) to get the best linear response, or slightly modify the first 4-5 points to get enhanced low flow performance. 13. through 33 – Freely Settable Points a. These points are used to give a unique characteristic to the positioner. Each point is programmed at 5% signal increments. You enter in the % of stroke associated with each point. Default settings are true linear. 34. DEBA – Deadband a. This setting is used to help keep the positioner very accurate. Default is Automatic. In automatic the deadband actually varies as the valve operates. b. Using the numerical input values, the best value for this feature is 0.2. At 0.1 the positioner can be slightly unstable. This value should not be used. Running with a fixed deadband results in better and more predictable performance. 35. YA – Stroke Limit a. This setting is used to bypass a portion of the stroke. On a sliding gate valve with overlap, this can be used to ‘zero out’ the overlap. The YA setting is manipulated on direct acting sliding gate valve to skip over the closing band. This is entered as a percentage of stroke. 36. YE – Stroke Limit a. This setting is used for reverse acting sliding gate valves. You would enter in the % of stroke taken up by the overlap to fine tune the controlled span. 37. YNRM – Position Display a. MPOS – This value will deliver a 0-100% reading based on the hard stops in the valve. This value is used for all globe style control valves. b. FLOW – This value is used for sliding gate valves. It linearizes the position display to read 0-100% from the beginning of the YA setting to the end of the YE setting. In other words, it only shows a positive valve position when flow is capable of running through the valve. 38. YDIR – Display Direction a. This value changes the way the display reads. If the signal is 4-20 mA, and the valve runs from closed to open, you would want the display to read the same. If after initialization the positioner reads backwards, this setting will correct that issue. This only changes the way the display functions. It does not have any influence over how the positioner reacts.39. YCLS – Tight Closing a. No – This feature is off. b. Up – This activates the tight closing in the upwards direction. Activates by value set in menu item #41. c. Do – This activates the tight closing feature to respond to the value set in menu item #40. d. Up/Do – This activates the tight closing feature in both directions based on the values entered in #40 & #41. 40. YCDO – Value for Tight Closing Down a. This parameter is represented as a percent of signal span. Setting this value tells the positioner at what signal to dump all of the air in the actuator and activate the tight closing down. 41. YCUP – Value for Tight Closing Up a. This parameter is represented as a percent of signal span. Setting this value tells the positioner at what signal to put all of the supply air in the actuator and activate the tight closing up. 42. through 49 – Alarm and Fault Message Options a. These are customer set for advanced users. Do not change any of these settings when basically setting up a positioner. These will be set to customer preferences. 50. PRST – Preset a. This function is used to restore the positioner memory to the Siemens factory default. These settings are not the settings we typically recommend for our products. Please refer to the positioner programming guide for proper settings. b. This function is especially useful if the customer has altered the menu settings and no one knows what has been changed. Use this to get back to a known state. 51. XDIAG – Advanced Diagnostics a. This menu activates a series of additional tests that can be run to optimize the positioner performance. Modifications of items in this section are not advised. Instructions for Calibrating Siemens PS2 Positioners Linear Valves 1. Assemble valve as normal. 2. Securely mount the take off plate and take off arm to the valve stem and secure. 3. Loosely mount the positioner to the bracket. 4. Set the ratio bar on the positioner to the proper setting for the valve stroke. 5. Lock the ratio bar with the small wheel lock located inside of the positioner. This must be locked in the 33º position if the stroke is less than 20 mm, or 90º for strokes longer than 20 mm. 6. Apply 35 psi to the supply port on the positioner for reverse acting valves, and 25 psi for direct acting valves. 7. Apply 4.0 mA to the proper terminals. 8. Using the ‘+ / -’ keys, move the valve to the 50% open position. 9. Adjust the position of the positioner so that the take off arm for the positioner is parallel with the actuator and horizontal to the positioner. 10. Securely lock the positioner and bracket in place with the mounting bolts. 11. Set the friction clutch to read somewhere between 48.0 and 52.0. The closer you get to 50.0, the more accurate the performance will be. 12. Hold the ‘Hand’ key down for 5 seconds to get into the menu mode. 13. Set the menu items as instructed on the following pages 8-10 to match the type of valve you have. 14. Once the programming changes are made for the specific valve, run through the automatic initialization on menu #4. Simply press and hold the ‘+’ key for 5 seconds to start the process. 15. After the initialization completes, lock down the friction clutch to prevent further adjustment. This is done with a screwdriver in the slot below the thumb wheel. 16. Momentarily press the ‘Hand’ key to get back to the main menu. 17. If any values have changed after locking down the friction clutch, simply reinitialize the positioner again to make sure the shift is learned by the positioner. 18. Press and hold the hand key for 5 seconds to get out of the menu mode. 19. Press the ‘Hand’ key one more time momentarily to get into Automatic mode. 20. Valve is ready for operation...s.velmurugan
Posted on: Sun, 07 Dec 2014 15:47:25 +0000
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