Troubleshooting

Source: 04.ES680N_故障处理.html (the “Troubleshooting” chapter of the ES680N comprehensive manual)

Fault severity classification

The drive’s faults and warnings are graded into three classes by severity (Class 1, Class 2, Class 3). Severity: Class 1 > Class 2 > Class 3.

Class	Short name	Notes
Class 1	NO.1	Non-resettable faults
Class 1	NO.1	Resettable faults
Class 2	NO.2	Resettable faults
Class 3	NO.3	Resettable warnings

Fault reset

Reset operation: set H0D.01=1 (fault reset), or use DI function 2 (FunIN.2: ALM-RST, fault and warning reset) and drive it to logical active.

NO.1 and NO.2 resettable faults: turn off the servo-enable (S-ON to OFF), then set H0D.01=1 or use DI function 2.
NO.3 resettable warnings: set H0D.01=1 or use DI function 9.

⚠️

For some faults or warnings, the cause must be eliminated before reset, and a successful reset does not mean the change is in effect. Changes that require a power-cycle must be followed by a control-power cycle; changes that require a stop must be applied with the servo disabled.

Parameter	Name	Range	Function	Effective	Default
`H0D.01`	Fault reset	0: no action; 1: fault/warning reset	For resettable faults and warnings, clears the fault display on the panel; returns to “0” after reset completes.	Immediate	0

Fault and warning history

The drive stores up to 10 of the most recent faults and warnings, along with the state parameters captured at each event. If the same fault or warning occurs repeatedly within the last 5 events, it is recorded only once.

Use H0B.33 to select how many events back from the latest, H0B.34 to view the name of the (n+1)-th event, and H0B.35–H0B.42 to view the corresponding state parameters. When there is no fault, H0B.34 shows “E000” on the panel.

Fault code list

Class 1 (NO.1) non-resettable faults

Display	Fault name	Type	Resettable
`E101.0`	Servo internal parameter abnormal	NO.1	No
`E101.1`	H00/H01 group function-code abnormal	NO.1	No
`E102.0`	FPGA communication-init abnormal	NO.1	No
`E102.8`	FPGA and MCU version mismatch	NO.1	No
`E104.1`	MCU runtime timeout (MCU hang)	NO.1	No
`E104.2`	FPGA runtime timeout (FPGA hang)	NO.1	No
`E104.4`	MCU command-update timeout	NO.1	No
`E120.0`	Unknown encoder model	NO.1	No
`E120.1`	Unknown motor model	NO.1	No
`E120.2`	Unknown drive model	NO.1	No
`E120.6`	Model mismatch	NO.1	No
`E136.0`	Encoder ROM motor-parameter checksum abnormal	NO.1	No
`E136.1`	Encoder ROM motor-parameter read abnormal	NO.1	No
`E140.0`	Encryption chip check abnormal	NO.1	No
`E140.1`	Encryption chip check failed	NO.1	No
`E140.2`	Wrong encryption chip version	NO.1	No
`E140.3`	Encryption chip damaged	NO.1	No
`E201.1`	U-phase overcurrent error	NO.1	No
`E201.2`	V-phase overcurrent error	NO.1	No
`E201.3`	Hardware overcurrent	NO.1	No
`E210.0`	Ground-short detection abnormal	NO.1	No
`E234.0`	Runaway protection	NO.1	No
`E740.2`	Absolute-encoder communication fault	NO.1	No
`E740.3`	Absolute-encoder single-turn calculation error	NO.1	No
`E740.6`	Encoder write fault	NO.1	No
`EA33.0`	Encoder data abnormal	NO.1	No
`EA34`	Encoder return-check abnormal	NO.1	No
`E750.2`	Encoder ParityError	NO.1	No
`E750.3`	Encoder DataError	NO.1	No
`E750.4`	Encoder DosFlagError	NO.1	No
`E750.5`	Encoder LotFlagError	NO.1	No
`E750.6`	Encoder AbsCntError	NO.1	No
`EE12.0`	ECAT init failed	NO.1	No

Class 1 (NO.1) resettable faults

Display	Fault name	Type	Resettable
`E150.0`	STO entered safe state	NO.1	Yes
`E150.1`	STO input state abnormal	NO.1	Yes
`E150.2`	Buffer 5V voltage abnormal	NO.1	Yes
`E150.3`	STO pre-opto directly conducting	NO.1	Yes
`E150.4`	Buffer power-on detection abnormal	NO.1	Yes
`E206.0`	Switching-frequency abnormal	NO.1	Yes
`E208.0`	MCU position-command update too fast	NO.1	Yes
`E208.2`	Encoder communication timeout	NO.1	Yes
`E208.3`	Current-sampling fault	NO.1	Yes
`E208.4`	FPGA current-loop compute timeout	NO.1	Yes
`E234.1`	Torque setting too small	NO.1	Yes
`E234.2`	Speed deviation too large	NO.1	Yes
`E400.0`	Main-circuit overvoltage	NO.1	Yes
`E410.0`	Main-circuit undervoltage	NO.1	Yes
`E500.0`	Motor overspeed	NO.1	Yes
`E500.1`	Speed-feedback overflow	NO.1	Yes
`E500.2`	FPGA position-feedback overspeed	NO.1	Yes
`E602.0`	Angle-identification stall	NO.1	Yes
`E602.2`	Angle-identification UVW phase reverse	NO.1	Yes
`E605.0`	Bootstrap speed too high	NO.1	Yes
`E606.0`	Buffer-resistor overload fault	NO.1	Yes
`E607.0`	Braking-resistor conduction time too long	NO.1	Yes
`E610.0`	OEM overload	NO.1	Yes
`E620.0`	Fan fault detection function	NO.1	Yes
`E630.0`	Motor stall	NO.1	Yes
`E630.1`	Motor stall	NO.1	Yes
`E650.0`	Heatsink overheat	NO.1	Yes
`E660.0`	Motor overtemperature	NO.1	Yes
`E660.1`	PT1000 short	NO.1	Yes
`E660.2`	PT1000 open	NO.1	Yes
`E770.0`	External encoder scale fault	NO.1	Yes
`E770.1`	External encoder scale fault	NO.1	Yes
`E770.2`	External encoder scale fault	NO.1	Yes

Class 2 (NO.2) resettable faults

Display	Fault name	Type	Resettable
`E122.0`	Multi-turn absolute-encoder setting error	NO.2	Yes
`E122.1`	DI function-assignment fault	NO.2	Yes
`E122.2`	DO function-assignment fault	NO.2	Yes
`E122.3`	Rotation-mode upper limit too large	NO.2	Yes
`E420.0`	Main-circuit phase loss	NO.2	Yes
`E440.0`	Output phase loss	NO.2	Yes
`E661.0`	One-key gain adjustment too low	NO.2	Yes
`E731.0`	Encoder battery invalid	NO.2	Yes
`E733.0`	Encoder multi-turn count error	NO.2	Yes
`E735.0`	Encoder multi-turn counter overflow	NO.2	Yes
`E760.0`	Encoder overheat	NO.2	Yes
`EB00.0`	Position deviation too large	NO.2	Yes
`EB00.1`	Position deviation overflow	NO.2	Yes
`EB01.0`	Position-command increment abnormal	NO.2	Yes
`EB01.1`	Position-command single-step increment too large	NO.2	Yes
`EB01.2`	Position-command continuous-increment too large	NO.2	Yes
`EB01.3`	Target position overflow on signed 32-bit limits	NO.2	Yes
`EB01.4`	Rotation-mode target position exceeds max single-turn position	NO.2	Yes
`ED07.6`	Bus offline	NO.2	Yes
`ED08.6`	Bus PDO transmission-length error	NO.2	Yes
`ED09.6`	Software position-limit upper less than lower	NO.2	Yes
`ED10.6`	Origin offset outside software limits	NO.2	Yes
`ED11.6`	Sync-frame error exceeds 1/4 period	NO.2	Yes
`EE08.0`	Sync lost	NO.2	Yes
`EE08.1`	Network-state error switch	NO.2	Yes
`EE08.2`	IRQ lost	NO.2	Yes
`EE08.3`	E08 caused by link loss	NO.2	Yes
`EE08.4`	RxErr due to Port0 link interference	NO.2	Yes
`EE08.5`	Forward error only	NO.2	Yes
`EE08.6`	No data received at all	NO.2	Yes
`EE09.0`	Soft-limit position setting error	NO.2	Yes
`EE09.1`	Origin setting error	NO.2	Yes
`EE09.2`	Bus gear ratio out of range	NO.2	Yes
`EE09.3`	No sync signal	NO.2	Yes
`EE09.5`	More than 10 PDO mapping objects	NO.2	Yes
`EE11.0`	ESI check error	NO.2	Yes
`EE11.1`	Bus EEPROM read failed	NO.2	Yes
`EE11.2`	Bus EEPROM update failed	NO.2	Yes
`EE13.0`	ECAT sync-period setting error	NO.2	Yes
`EE15.0`	ECAT sync-period deviation too large	NO.2	Yes

Resettable warnings

Display	Warning name	Type	Resettable
`E108.0`	Store-parameter write fault	NO.2	Yes
`E108.1`	Store-parameter read fault	NO.2	Yes
`E108.2`	EEPROM write-check error	NO.2	Yes
`E108.3`	EEPROM read-check error	NO.2	Yes
`E121.0`	Servo-enable command invalid warning	NO.2	Yes
`E600.0`	Inertia-identification failed warning	NO.2	Yes
`E601.0`	Homing timeout warning	NO.2	Yes
`E601.1`	Homing-switch abnormal	NO.2	Yes
`E601.2`	Homing mode setting error	NO.2	Yes
`E640.0`	EEPROM parameter-config error	NO.2	Yes
`E640.2`	New drive board	NO.2	Yes
`E640.3`	Old drive-board model read error	NO.2	Yes
`E640.4`	Inconsistent with main-control board parameters	NO.2	Yes
`E640.6`	Main-control board function-code out of range	NO.2	Yes
`E730.0`	Encoder battery-voltage warning	NO.2	Yes
`E900.0`	Emergency-stop warning	NO.2	Yes
`E902.2`	Torque-reached setting invalid warning	NO.2	Yes
`E904.0`	Cycle monitoring warning	NO.2	Yes
`E909.0`	Motor-overload warning	NO.2	Yes
`E910.0`	Control-power overvoltage	NO.2	Yes
`E920.0`	Regenerative-discharge resistor overload	NO.2	Yes
`E922.0`	External regenerative-brake resistor too small	NO.2	Yes
`E924.0`	Discharge-overload warning	NO.2	Yes
`E941.0`	Parameter change requires power-cycle	NO.2	Yes
`E942.0`	Parameter-store frequency warning	NO.2	Yes
`E950.0`	Forward overtravel warning	NO.2	Yes
`E952.0`	Reverse overtravel warning	NO.2	Yes
`EA41.0`	Torque-ripple compensation failed	NO.2	Yes
`E831.1`	AI zero-bias too large	NO.2	Yes
`E834.1`	MCU AD overvoltage warning	NO.2	Yes
`E831.2`	AI zero-bias too large	NO.2	Yes
`E834.2`	MCU AD overvoltage warning	NO.2	Yes
`E831.3`	AI zero-bias too large	NO.2	Yes
`E834.3`	MCU AD overvoltage warning	NO.2	Yes

Restart after a fault

Stage	Action	Notes
When the fault occurs	View the five most recent fault timestamps, types, and the speed/current/bus/DI/DO state at the time of fault on the operator panel	Use `H0B.34`–`H0B.43`
Before reset	Identify and clear the cause from the fault type on the panel, then reset	Refer to the fault-code list for handling

Ways to reset a fault:

Set a DI to function 2 (H03.02–H03.10=2, fault reset) and drive it active. Long-press the red stop/reset key on the panel for 2 seconds.
H0D.01=1 enables reset in any operating mode.
Power-cycle the drive for automatic reset: disconnect the main power, wait until the panel display disappears, then reapply power.
Reset over the communication interface: write “7” (fault reset) to communication address 2000H from the host to reset after the fault is cleared.

Common symptoms and remedies

No.	Symptom	Possible cause	Remedy
1	No display on power-up	Grid voltage missing or too low	Check input power
		Drive-board switch-mode supply faulty	Check bus voltage
		Cable between control board, drive board, or keypad broken	Reseat the 40-pin cable
		Buffer resistor damaged / control board or keypad faulty	Consult a technician
		Rectifier damaged / poor contact between drive board and control board	Reseat the 40-pin cable
		Components on the control board damaged / motor or motor cable grounded	Consult a technician
2	Display is normal on power-up, then shows “HC” and stops immediately after running	Fan damaged or stalled	Replace fan
		External control terminal wiring shorted	Clear the external short
		Motor wiring abnormal	Re-verify the drive-to-motor wiring
3	Motor does not rotate after the drive runs	Drive parameter error (motor params)	Restore factory settings and reconfigure
			Check encoder and motor rated parameters (rated frequency, rated speed, etc.)
			Check `H02-00` (control mode) is set correctly
		Poor contact between drive board and control board	Reseat the connection
		Drive-board fault	Consult a technician
4	DI terminal not effective	Parameter error	Recheck F4-group parameters
		Wrong external signal	Rewire the external signal
		Wrong S1 DIP setting	Confirm S1 matches actual wiring
		Control-board fault	Consult a technician
5	Drive frequently reports overcurrent and overvoltage	Motor parameters incorrect	Reconfigure motor parameters or run motor tuning
		Acceleration/deceleration time inappropriate	Set appropriate acceleration/deceleration times
		Load fluctuation	Consult a technician
6	Burnt buffer resistor	Braking-resistor lead shorted to chassis (PE)	Add insulation to the braking-resistor lead
		Braking transistor blown	Replace the braking transistor
		DC-bus capacitor blown/shorted	Replace the bus capacitor
		Negative bus shorted to ground	Clear the fault

Troubleshooting the test run in speed mode

Start-up stage	Symptom	Cause	Verification
Control supply on (24V 0V)	Digit display does not light or show “ry”	1. Control supply voltage fault	Unplug CN1, CN2, CN3, CN4; fault persists. Measure 24V/0V voltage
		2. Input voltage fault	For 3ph 380V models, measure R/S/T AC voltage. If main DC bus ((+), (-)) is below the undervoltage point of 350V, the display shows “nr”
		3. Program-burn terminal shorted	Check whether the program-burn terminals are shorted
		4. Drive fault	Refer to the fault-code list and clear the cause
Main power (R S T) on	Panel shows “Exxx.y”	Fault or warning	Refer to the fault/warning code list

Quick Tuning Guide Parameter List