Quick Tuning Guide

Source: 03.ES680N_快速调试指南.html (the “Quick Tuning Guide” chapter of the ES680N comprehensive manual)

Commissioning preparation

Power-on checks

Confirm the following before applying power.

Item	Content
Supply voltage	Confirm supply voltage is correct (AC 380V–480V, 50/60Hz). Ensure the input terminals (R/S/T) are firmly wired.
Grounding	Confirm the drive and motor are grounded correctly.
Drive output and motor terminals	Confirm the drive output (U/V/W) to motor wiring is firm and the phase sequence is correct.
Control-circuit wiring	Confirm control-circuit terminals are firmly wired to other control devices.
Control-terminal state	Confirm all control-circuit terminals are OFF (drive is not running).
Load	Confirm the motor is unloaded and disconnected from the mechanical system.
Encoder connection	Confirm the encoder terminal connection is firm.

Power on

In a normal state the operator display after power-up is:

State	Display (example)	Notes
Normal	Default display	State: 10RY / 18RY
Fault	Fault code format: Exxx.y	E: fault state; xxx: fault code; y: sub-code

Quick-tuning flow chart

The product supports tuning-free motor start for fast commissioning. Commissioning has two paths: speed mode and pressure mode.

Hydraulic servo commissioning

AI zero-drift auto-correction

Step	Function code	Notes
AI zero-drift auto-correction	`H0D.10=1`	AI zero-drift auto-correction completes in about 1 second

⚠️

Manual correction: with the drive disabled, read the three AI channels H0B.92, H0B.93, H0B.94. Take the maximum value plus a 0.08V margin and write it to H1A.33, H1A.38, and H1A.43. After AI zero-drift auto-correction finishes, H0D-10 automatically returns to “0”.

Pressure function parameters

System pressure and flow mapping

Code	Name	Setting	Notes
`H14.00`	Pressure mode	0: non-pressure mode; 2: pressure mode 2; 5: pressure mode 5	Select the pressure operating mode
`H14.01`	Max speed	Set per actual requirement	The motor speed corresponding to 100% flow command
`H14.02`	System pressure	0 to max pressure (`H14.03`)	Maximum system pressure
`H14.03`	Max pressure	Per pressure-sensor range	Pressure-sensor range, matched to 0–10 Vdc output

AI1 pressure command mapping

Code	Name	Setting	Notes
`H1A.33`	AI1 minimum input	AI1 zero drift	Minimum voltage for pressure command
`H1A.34`	AI1 minimum-input setting	Default 0.0%	Minimum pressure command
`H1A.35`	AI1 maximum input	Typically 10 V	Maximum voltage for pressure command
`H1A.36`	AI1 maximum-input setting	Default 100.0%	Maximum pressure command; 100.0% = `H14.02`

Sets AI1 0–10 V (or other range) to 0 kg/cm² to system pressure (H14.02).

AI2 flow command mapping

Code	Name	Setting	Notes
`H1A.38`	AI2 minimum input	AI2 zero drift	Minimum voltage for flow command
`H1A.39`	AI2 minimum-input setting	Default 0.0%	Minimum flow command
`H1A.40`	AI2 maximum input	Typically 10 V	Maximum voltage for flow command
`H1A.41`	AI2 maximum-input setting	Default 100.0%	Maximum flow command; 100.0% = max speed (`H14.01`)

Sets AI2 0–10 V (or other range) to 0 rpm to max speed (H14.01).

AI3 pressure feedback mapping

Code	Name	Setting	Notes
`H1A.43`	AI3 minimum input	AI3 zero drift	Minimum voltage for pressure feedback
`H1A.44`	AI3 minimum-input setting	Default 0.0%	Minimum pressure feedback
`H1A.45`	AI3 maximum input	Typically 10 V	Maximum voltage for pressure feedback
`H1A.46`	AI3 maximum-input setting	Default 100.0%	Maximum pressure feedback; 100.0% = max pressure (`H14.03`)

Sets AI3 0–10 V (or other range) to 0 kg/cm² to max pressure (H14.03).

Pressure release

Code	Name	Setting	Notes
`H14.08`	Max reverse speed	Percentage of max speed	Largest reverse speed during pressure release. Higher values give faster release but more pump-reversal noise.

Base flow and base pressure

Because of internal leakage in the pump, when no flow or pressure command is given, the hydraulic fluid flows back into the tank, letting air into the oil path and creating noise and instability. A small base flow and base pressure are therefore required.

Code	Name	Range	Notes
`H14.09`	Base flow	0.0%–50.0%	Percentage of max speed (`H14.01`)
`H14.10`	Base pressure	0.0–50.0 kg/cm²	System base pressure

Pressure command filter times

Code	Name	Range	Notes
`H1A.37`	AI1 filter time	0.000 s–9.999 s	AI1 filter
`H14.04`	Group-1 pressure-command rise time	0.000 s–2.000 s	Pressure-rise ramp
`H15.02`	Group-1 pressure-command fall time	0.000 s–2.000 s	Pressure-fall ramp
`H14.25`	Group-1 pressure-command rise S-filter	0.001 s–10.000 s	S-curve filter
`H14.26`	Group-1 pressure-command fall S-filter	0.001 s–1.000 s	S-curve filter

Shorter filter times give faster pressure response with larger overshoot; longer filter times slow the response and reduce overshoot.

Flow command filter times

Code	Name	Range	Notes
`H1A.42`	AI2 filter time	0.000 s–10.000 s	AI2 filter
`H15.03`	Group-1 flow-command rise time	0–5.000 s	Flow-rise ramp
`H15.04`	Group-1 flow-command fall time	0–5.000 s	Flow-fall ramp

Shorter filter times give faster pressure response with more mechanical shock; longer filter times give smoother operation.

Pressure PID response tuning

Pressure PID group selection

Pressure PID mode 1: DI group selection

The drive provides four PID groups selected by the combination of DI inputs 48#DI2 and 49#DI3:

DI3 (49#DI function)	DI2 (48#DI function)	PID group
0	0	Group 1: `H14.05`, `H14.06`, `H14.07`
0	1	Group 2: `H14.11`, `H14.12`, `H14.13`
1	0	Group 3: `H14.14`, `H14.15`, `H14.16`
1	1	Group 4: `H14.17`, `H14.18`, `H14.19`

Higher proportional gain Kp, shorter integral time Ki, and larger derivative time Kd give faster response, but if response is too fast it will overshoot and oscillate. Conversely, a weak response lowers efficiency and causes inconsistent parts.

Pressure PID proportional gain

Parameters: H14.05, H14.11, H14.14, H14.17

Higher gain gives faster pressure response; too high causes oscillation.

Pressure PID integral time

Parameters: H14.06, H14.12, H14.15, H14.18

Shorter integral time gives faster pressure response; too short causes overshoot; too weak causes pressure instability.

Pressure-loop gain coefficient

Code	Name	Range	Unit	Default	Change
`H14.29`	Pressure-loop gain coefficient	0.2%–5.00%	%	1.00	Real-time

Used to tune the overall pressure-loop response. Higher values make the loop more responsive; too high causes oscillation.

⚠️

When the hydraulic inertia is large or the hose is long and thin, this gain usually needs to be reduced.

Holding-pressure stability

If holding pressure fluctuates significantly, improve stability by strengthening the first (low-speed) speed-loop stiffness—raise H09.01 moderately. Do not overdo it or motor control will oscillate.

Code	Name	Value	Default	Change
`H09.01`	Stiffness level 1	0–31	12	Real-time

Switch pressure-loop PI based on the setpoint

Code	Name	Value	Default	Change
`H14.63`	High/low-pressure PI switch enable (Kp)	0–1	0	Real-time
`H14.64`	Group-1 low-pressure Kp	0.0–800.0	210	Real-time
`H14.65`	Group-1 low-pressure Ti	0.001–10.000	0.5	Real-time
`H14.66`	Group-1 high-pressure Kp	0.0–800.0	260	Real-time
`H14.67`	Group-1 high-pressure Ti	0.001–10.000	0.02	Real-time
`H14.68`	Low-pressure threshold	0.0 to `H14.69`	50	Real-time
`H14.69`	High-pressure threshold	`H14.68` to `H14.02`	100	Real-time

When H14.63=1, the high/low-pressure PI switch is enabled. H14.05 and H14.06 then change automatically based on the setpoint:

Above H14.69, use H14.66 and H14.67.
Below H14.68, use H14.64 and H14.65.
Between H14.68 and H14.69, the PI values are interpolated linearly.

⚠️

The high/low-pressure PI switch is only effective with PID group 1, i.e. when both 49#DI and 48#DI are 0.

Electrical Installation & Design Troubleshooting