User Manual of EM760 High-Performance Inverter Table 6-5 Description of PID Parameter Options As described in the table, when the function code F09.11 is set to 0, the PID parameters will not be switched, and the first group ofparameters (F09.05 toF09.07) will prevail; when the function code is set to 1, the PID parameters will be selected according to the status of the input function “43:
PID parameter switching”; when the function code 2 is used, the PID parameters will be selected according to the absolute value |e(k)| (=|setting-feedback|) ofthe current deviation and the relationship between the function codes F09.12 and F09.13, or the linear difference may be used; when the function code 3 is used, processing is similar to that of the option 2, the PID parameters will be selected according to the percentage of the current output frequency to maximum frequency |P| = (output frequency/maximum frequency * 100%) and the relationship between the function codes F09.12 and F09.13, or the linear difference maybe used.
In the case of “F09.12≤|e(k)|≤F09.13”, the current PID parameters are obtained through linear interpolation of the first and second groups of parameters. The specific principle is shown by the intermediate segment in the figure below. 91 Method Description F09.11 Other conditions 0 -- PID parameters are not switched. The first group of parameters is used. 1 43: PID parameter switching PID parameters are switched via the digital input terminal (43: PID parameter switching). 0 Invalid switching, the first group of parameters 1 Valid switching, the second group ofparameters 2 |e(k)|~F09.12/13 PID parameters are automatically switched according to the deviation.
|e(k)| The first group ofparameters |e(k)|> F09.13 The second group ofparameters Middle According to the deviation, linear interpolation is performed based on the two groups ofparameters. 3 |P|~F09.12/13 PID parameters are automatically switched by frequency. |P| The first group ofparameters |P|> F09.13 The second group ofparameters Middle According to the frequency, linear interpolation is performed based on the two groups of parameters.