Appendix A Runtime Templates PID Controller FCM3BUR002418-600 A 231PID Controller FCMThis section describes the active runtime fields on the controller FCM templets.The PID controller FCM is treated in a different manner from other FCMs becausethe PID Controller FCM Templet can have children. These children are the AdaptiveGain and Adaptive Reset Templets. When you fill in a templet planning form for aPID controller, the entry you make to the ADAPTIVE CONTROL field determineswhether you need to fill in the Adaptive Gain and/or Adaptive Reset templets.If the entry to the ADAPTIVE GAIN field is:GAIN fill in an Adaptive Gain TempletRESET fill in an Adaptive Reset TempletBOTH fill in an Adaptive Gain and an Adaptive Reset TempletNONE no Adaptive Templets are neededPROCESSING RATE FieldThe field indicates the multiple of the loop processing rate at which the controlleralgorithm is executed. If the default (1) is used, the FCM is processed each time theloop is processed. If the field is changed to 2, the FCM is processed every secondtime the loop is processed. Valid entry is an integer multiple of the loop processingrate specified on the Loop Definition Templet. For example, if the value of this fieldis 3 and the loop processing rate is 4 seconds, the controller algorithm is processedevery 12 seconds.BASE GAIN FieldThis field specifies the gain (proportional response) in a fixed gain controller. If noadaptive functions are turned on, the base gain is the active gain of the FCM, and theFCM operates as a fixed gain controller. When an adaptive gain function is turnedon, all changes in active gain due to the algorithm for that function are based on thebase gain. Valid entry is a decimal number.
