f* [Hz] = Np [kp/S] ×
Input Terminal [PIA][PIB] Pulse Scaling Factor Numerator (3014Hex-12Hex)
Input Terminal [PIA][PIB] Pulse Scaling Factor Denominator (3014Hex-11Hex)
PV [%] = f* [Hz] ×
100
Maximum output frequency [Hz]
PV [%]: PID feedback input
f* [Hz]: Frequency set value
Np [kp/s]: Entered input pulse frequency
PV [%]: PID feedback input
f* [Hz]: Frequency set value
Np [kp/s]: Entered input pulse frequency
Feedforward Selection
Feedforward is applied during PID process control. PID Control PID Feedforward Selection for Proc-
ess Control (301FHex-16Hex) If 1: Analog input terminal is selected for PID Control PID Feedforward
Selection for Process Control (301FHex-16Hex), allocate “21: PID feed forward” to Input Terminal [AI1]
Function Selection (3005Hex-3EHex) as the setting for the terminal used in the feedforward signal. If
not allocated, feedforward control is not performed.
Feedforward is disabled during dancer control.
PID Variable Range
In the case of PID process control, the PID output is restricted to a variable range with reference to the
target value.
When using this function, set PID Control PID Output Variable Range for Process Control
(301FHex-15Hex). Then, the output frequency will be limited to within a range of Target value ±
(301FHex-15Hex) with the maximum frequency as 100%.
The function is disabled when PID Control PID Output Variable Range for Process Control
(301FHex-15Hex) is 0.0. The function is also disabled when “4: Process normal operation, opposite
operation available” or “5: Process inverse operation, opposite operation available” is set to PID Con-
trol Function Selection (300EHex-02Hex).
PID output [%]
PID output range
PID Control PID Output Variable Range
for Process Control (301FHex-15Hex)
PID Control PID Output Variable Range
for Process Control (301FHex-15Hex)
PID target value
Time [s]
8 Other Functions
8-117
M1 Series EtherCAT Type User’s Manual (I670)
8-9 Other Operation Functions
8
8-9-13 PID Function
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