11to proceed:Test Procedure: Adjust the target (displayed) speed as expected during normal operation, includingtesting inhibit and jog transitions if applicable.Tuning Method:Step 1 - Connect control to loaded motor with application's anticipated load for realistic tuningStep 2 - Perform test procedureStep 3 - If control performs adequately, stop tuning and record settingsStep 4 - If control is too sluggish or takes too long to reach the target speed, then try increasingI Gain slightly (add 250). Perform the test procedure again. Continue increasing I Gainuntil motor starts to slightly oscillate or become unstable. At this point, decrease the I Gainby 250.Step 5 - If control is too aggressive or is causing the motor to oscillate or become unstable, thentry decreasing I Gain slightly (subtract 250). Perform the test procedure again. Continuedecreasing I Gain until motor starts to stabilize and regulate more accurately.Step 6 - Once I is set, adjust P Gain and perform test procedure. In this control, additional P Gainmay or may not improve response or stability. Experimentation will be required.Accel and decel settings have a small impact on PI tuning as well. Specifically, when accel and decelsettings are extremely fast, they can cause the control loop to perform more sluggishly. Another thingto keep in mind is that PI tuning also affects accel and decel times. For instance, a sluggishly tunedPI control loop may take longer than the programmed accel and decel times to reach the target;whereas, an aggressively tuned PI control loop will reach the target faster.Master (Rate and Time) and Follower (Ratio) Modes ExplainedThe MDP controls have two basic modes of operation, master and follower. In the Master modes, thecontrols are capable of operating independently; whereas, in the Follower Mode, the control requiresa signal from a master to operate. The Follower Mode is used in applications which require the MDPto closely follow a master process. For example, if a factory has ten conveyors which must besynchronized over long periods of time, an industrial engineer could use one MDP as a master controlfor the first conveyor and nine MDPs as slaves or followers which would receive their speed commandsfrom the first conveyor's master control or pickup.In Master Rate Mode, the MDP controls the rate of the motor by tracking the motor's pickup pulses whichare applied to signal input 1 (S1). In this mode, the display indicates in rate units such as Gallons-per-minute, feet-per-second, and RPM.In Master Time Mode, the MDP controls the process time by tracking the motor's pickup pulses whichare applied to signal input 1 (S1). In this mode, the display indicates in time units such as HH:MM orMM:SS, where HH is hours, MM is minutes, and SS is seconds. This mode is most-commonly usedin time-sensitive processes such as conveyor ovens and plating applications.In Follower Mode, the MDP tracks the number of pulses which are applied to the master signal input(S2). From these pulses, it calculates the rate of the master process. This rate is then multiplied bythe percentage which is displayed on the user interface. The display is in 0.1% of master units. Forexample, 675 = 67.5 percent of master speed. A master running at 1350 RPM, would cause the followerto run its motor at 67.5% * 1350 RPM or 911.25 RPM. Typical follower applications includesynchronized rotation, synchronized conveyors, and some web-material processes.