- Operation Panel Functions and Parameter Settings
1.1 Operation Panel Features
The YTA/YTB series features a 4-digit LED display panel with:
Status indicators: RUN (operation), STOP (stop), CTC (timer/counter), REV (reverse)
Function keys:
FUNC: Parameter setting
PROC: Parameter save
▲/▼: Frequency adjustment
FWD/REV: Forward/reverse control
STOP/RESET: Stop/reset
1.2 Password Protection and Parameter Initialization
Password Setup:
Press FUNC to enter parameter mode
Set D001 parameter (user password) to 1 for unlocking
Restore to 0 after modification to lock parameters
Factory Reset:
Unlock parameters (D001=1)
Locate D176 parameter (factory reset)
Set to 1 and press PROC to execute initialization
- External Control Implementation
2.1 External Terminal Forward/Reverse Control
Wiring:
Forward: Connect FWD terminal to COM
Reverse: Connect REV terminal to COM
Common: COM terminal
Parameter Settings:
D032=1 (external terminal control)
D096=0 (FWD for forward/stop, REV for reverse/stop)
D036=2 (allow bidirectional operation)
D097 sets direction change delay (default 0.5s)
2.2 External Potentiometer Speed Control
Wiring:
Potentiometer connections:
Ends to +10V and COM
Wiper to AVI terminal
AVI range selection via DIP switch (0-5V or 0-10V)
Parameter Configuration:
D031=1 (frequency source from AVI)
Match potentiometer output range with DIP switch
Set D091-D095 for analog-frequency mapping
- Fault Diagnosis and Solutions
3.1 Common Error Codes
Code Meaning Solution
Eo/EoCA Overcurrent Increase acceleration time (D011)
EoCn Running overcurrent Check load/motor condition
EoU Overvoltage Extend deceleration time (D012)
EoL Overload Reduce load or increase capacity
ELU Undervoltage Check power supply voltage
3.2 Maintenance Guidelines
Regular Checks:
Clean heat sinks and vents every 3 months
Verify terminal tightness
Monitor operating current
Record fault history (D170-D172)
- Advanced Functions
4.1 PLC Programmable Operation
Configuration:
D120=1/2/3 (select single/cyclic/controlled cycle)
D122-D136 set segment speeds
D141-D156 set segment durations
D137/D138 set direction for segments
4.2 PID Closed-loop Control
Setup:
D070=1 (enable PID)
D072-D074 set P/I/D parameters
Connect feedback signal to ACI terminal (4-20mA)
Set target value via AVI or panel
4.3 RS485 Communication
Parameters:
D160: Station address (1-254)
D161: Baud rate (4800-38400bps)
D163: Communication format (8N2 RTU mode)
This guide covers all operational aspects from basic controls to advanced applications of Yuchao YTA/YTB series inverters. For complex issues, please contact us.