GE VAT2000 Instruction Manual

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Contents

6. Control Functions and Parameter Settings6-48B43-0~4 PID controlThe analog input (FSV, FSI, AUX) can be configured as a feedback loop as shown below.The below is an example. It is possible to use any analog input either as setting or feedback.PID M0-10VA U XC O MC 12-4(ga in)VAT2000 press ure sen so rC onvert erFS V o r FS I0-10V4-20m A+ -Pum pExample of PID control configuration(Note 1) PID control functions only in the remote mode (LCL LED OFF)(Note 2) PID control functions in respect to the sequence command FRUN or RRUN, butdoes not operate with other sequence commands like Jog for exampleThe PID operation block is shown below,D ifere ntia l tim e co ns ta nt (B 4 3-2 )U p pe r lim ite r (B 43 -3)L ow e r lim ite r (B 43 -3)F S V o r F S IA U X or F S IM ax freq ue nc y (B 0 0-4 )M ax . sp ee d (B 01 -4 )0 to 10 0%L im itF re q ue nc yo r s pe ed c on tro lIn te gra l tim e co ns ta nt (B 4 3-1)P ro po rtion al g ain (B 43 -0)(1) Is possible to enable or disable the PID control during operation by switching ON orOFF the sequence input function PIDEN. This can be controlled by one of theprogrammable digital inputs.(2) Refer to fig 5-9 and select the PID’s setting input.(3) Set the analog input to be used as feedback with C07-5. Set the range of the selectedanalog input with block parameters C12.(4) If the feedback signals must be 4-20mA type, use FSI as feedback. However would bepossible to use AUX for 4-20mA signals, setting C12-2=2 to fix AUX input in range of 1-5V, and then connect a external resistor of 250 Ohms, 1%, 1/2W, between AUX andCOM terminals.