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If “ON/OFF” was selected in the Control Type, the display skips to the Dead Band Submenu. AUTO PID SUBMENU: Press d 21) Display flashes ENBL or DSBL. Press b 22) Scroll through the available selections: “Enable” or “Disable”. Press d 23) Display shows STRD stored message momentarily and then advances to ANTL only, if it was changed, otherwise press a to advance to ANTL Anti Integral Submenu. If “Enabled”, the controller can determine, by enabling Start PID, the optimum values for the three adjustments — Proportional, Reset and Rate corresponding to P, I, and D. These values may be changed once the auto tuning is complete. If “Disabled” is selected, the user will manually enter these three adjustment values. If you want the instrument to do the auto PID and the P , PI or PID, first select auto disable and enter 0000 for each unwanted parameter. e.g. for PI enter 0000 for the rate. ANTI INTEGRAL SUBMENU: Press d 24) Display flashes ENBL or DSBL. Press b 25) Scroll through the available selections: “Enable” or “Disable”. Press d 26) Display shows STRD stored message momentarily and then advances to STRT only, if it was changed, otherwise press a to advance to STRT to Start Auto Tune PID Submenu (If auto PID was Enabled). If Auto PID was disabled display advances to PRoP Proportional Band Submenu. 39 If Anti Integral (Anti Windup) Submenu “Enabled”, this feature allows the error term outside the proportional band to be calculated and accumulated for integration. This may be an important feature in applications where fast response time is desirable. START AUTO TUNE PID: Press d 27) Display flashes ENBL or DSBL. Press b 28) Scroll through the available selections: “Enable” or “Disable”. Press d 29) Display shows STRD stored message momentarily and then advances to CYCL only, if it was changed, otherwise press a to advance to CYCL Cycle Time Submenu. If “Enabled”, the controller is ready to calculate P, PI or PID parameters. The instrument performs this by activating the output and observing the delay and rate at which the Process Value changes. The set points must be at least 20 counts above the (PV) Process Value in order to perform Auto Tune, otherwise an error message will be displayed. To start Auto Tune PlD select PID, enable Auto PID and enable Start PID. Sometimes Auto PID parameter needs fine tuning i.e. for each 10 counts over shoot increase the Proportional Band (PB) by 15% and for each ±1 count fluctuation at the Set Point (SP) increase reset by 20%. Once started, display shows A.TUN with letters blinking in the rotating pattern. When auto tune stops, display will show process value. Do not perform any operations or settings before first stopping Auto Tune. Any alarms or other output is disabled during Auto Tune. If “AUTO PID” was “DISABLED”, the display will show the following three submenus. This allows the user to manually enter values for Proportional, Reset and Rate terms corresponding to P, I, and D. It also can be used for Auto PID by disabling unwanted parameter e.g. PI enter 0000 for Rate. PROPORTIONAL BAND SUBMENU: Press d 30) Display flashes 1st digit of the previous P PRoP Proportional band value. Press b & c 31) Press b and c buttons to enter a new “Proportional Band” value. Press d 32) Display shows STRD stored message momentarily and then advances to REST only, if it was changed, otherwise press a to advance to REST Reset Setup Submenu. Proportional Band is in counts. Proportional Band is defined, as the change in the instrument input to cause a 100% change in the controller output. 40 RESET SETUP SUBMENU: Press d 33) Display flashes 1st digit of the previous I REST Reset value. Press b & c 34) Press b and c buttons to enter a new “Reset” value. Press d 35) Display shows STRD stored message momentarily and then advances to RATE only, if it was changed, otherwise press a to advance to RATE Rate Setup Submenu. Reset unit is in seconds 0-3999. RATE SETUP SUBMENU: Press d 36) Display flashes 1st digit of previous D RATE Rate value. Press b & c 37) Press b and c buttons to enter a new RATE value. Press d 38) Display shows STRD stored message momentarily and then advances to the CYCL only, if it was changed, otherwise press a to advance to CYCL Cycle Time submenu. Rate unit is in seconds 000.0-399.9. If the Output 1 is Analog Option the display skips to Damping Factor. CYCLE TIME SUBMENU: Press d 39) Display flashes 1st digit of the previous CYCL Cycle Time value. Press b & c 40) Press b and c buttons to enter a new “Cycle Time” value. (1 to 199 seconds) Press d 41) Display shows STRD stored message momentarily and then advances to DPNG only, if it was changed, otherwise press a to advance to DPNG Damping Factor Submenu. A Cycle Time selected between 1 and 199 seconds determines the total On/Off time of each proportional cycle. For example, a 15 second cycle time means that every 15 seconds the output will turn on for part or all of the cycle. For Relay control outputs, do not select a cycle t...

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