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7 Other Functions
7 - 48
Multi-function Compact Inverter 3G3MX2-V1 User’s Manual (I585-E1)
This function limits the PID output to within the variable range defined based on the target value.
To use this function, set the PID Variable Range Limit (A078) as a percentage of the maximum fre-
quency. Then, the output frequency will be limited to within a range of Target value ± (A078).
This function is disabled when A078 is set to 0.0 or PID Selection (A071) is set to 02 (Enabled: Reverse
output enabled).
Under normal PID control (A071 = 01), the frequency reference to the inverter will be limited to 0 Hz if
the result of PID operation is a negative value. However, when the PID Selection (A071) is set to 02
(Reverse output enabled), reverse output is enabled for the inverter if the result of PID operation is a
negative value.
When A071 is set to 02, the PID Variable Range Limit (A078) setting is disabled.
If the PID function does not provide a stable response, adjust the appropriate gain setting according to
the table below.
You can set the PID Deviation Excessive Level (C044) for PID control. This inverter can be configured
to output this signal to a multi-function output terminal if the PID deviation
ε
reaches the level set in
C044 or higher. The inverter will not shut off its output (trip), however.
Allocate the Multi-function Output P1/P2 Selection (C021/C022) or the Multi-function Relay Output (MA,
MB) Function Selection (C026) to 04 (OD).
Set C044 in units of percentage as 100% of the 1st/2nd Maximum Frequency (A004/A204).
PID Variable Range
PID Reverse Output
PID Gain Adjustment
Phenomenon
Adjustment
Changes in target value are not reflected quickly on feedback value.
Increase PID P Gain (A072).
Changes are reflected quickly on feedback value, but not stable.
Decrease PID P Gain (A072).
Target and feedback values do not match quickly.
Decrease PID I Gain (A073).
Feedback value fluctuates unstably.
Increase PID I Gain (A073).
Increasing PID P Gain does not improve response speed.
Increase PID D Gain (A074).
Increasing PID P Gain results in fluctuating and unstable feedback value.
Decrease PID D Gain (A074).
PID Deviation Excessive (OD)
PID Variable Range Limit (A078)
PID output [%]
PID target value
PID output range
PID Variable Range Limit (A078)
Time [s]
Summary of Contents for SYSDRIVE MX2 SERIES
Page 1: ...Multi function Compact Inverter MX2 Series Type V1 User s Manual I585 E1 01 3G3MX2 A V1 ...
Page 32: ...CONTENTS 29 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 108: ...2 Design 2 48 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 176: ...4 Parameter List 4 42 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 538: ...10 Troubleshooting 10 22 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 598: ...12 Options 12 50 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 614: ...Appendices A 16 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 ...
Page 615: ...I 1 Multi function Compact Inverter 3G3MX2 V1 User s Manual I585 E1 I Index ...