User Manual EM303B General Purpose Inverter F4-10 Integration function scale: When error between PID setting value and feedback is greater than the setting value, there is no integral operation. 1. Setting value of F4-10= (PID setting value - Feedback)/PID Scale 2. Set inverter in the process PID closed-loop control mode, and regulate the parameters of PID controller based on the output waveforms through the output of feedback signal monitoring system. Generally, regulation follows the rules: 3. Increase the proportional gain GP within the range of non-oscillation output. 4. Shorten integration time constant GTi within the range of non-oscillation output. 5.
Prolong differentiation time constant GTd within the range of non-oscillation output. After all PID parameters set, all of them can be slightly adjusted by following steps: Output overshoot suppression: Shorten the differentiation time GTd, and prolong the integration time GTi, as shown in Figure 7-15. Output periodic oscillation suppression: Shorten the differentiation time GTd or set it as zero, and reduce proportion gain GP, as shown in Figure 7-16. Output Before Adjustment Output Before Adjustment After Adjustment After Adjustment Time Figure 7-15 Output overshoot Suppression Time Figure7-16 Output periodic oscillation suppression F4-11 limits the range of positive PID output.
If PID setting value>PID feedback continuously, PID operation will not proceed when reached the limit. F4-12 limits the range of negative PID output. If PID setting value continuously, PID calculation will not proceed when reached the limit. Bit setting value=0 Monitoring frequency shows absolute value when motor forwards/reverses. 114 No. Function Range Unit Default Type F4-10 In tegration Function Scale 0.00~100.00 % 100.00 ● No. Function Range Unit Default Type F4-11 PID Upper Limit 0.00~100.00 % 100.00 ● F4-12 PID Lower Limit 0.00~100.00 % 0.00 ● No. Function Range Unit Default Type M R F4-15 O onitoring eference ptions * Iq E-Slip E-Speed * F S F I 11111111 ● 0 0 0 0 0 0 0