LCDA818H Two-Phase 86 Digital Display Servo Driver

Product Overview

The LCDA818H driver is a digital stepper driver developed using the latest generation 32-bit DSP chip, capable of controlling closed-loop stepper motors with an 86 frame size; this driver supports three control modes: pulse, IO, and analog.

Features

Voltage input range: DC30V~110V / AC24V~80V Maximum peak current: 8A Subdivision range: 400~51200ppr Signal input: differential/single-ended, pulse/direction or dual pulse Pulse response frequency: 200KHz Parameters can be configured via serial port Supports three control modes: pulse, IO, and analog Features protection functions such as overcurrent, overvoltage, undervoltage, phase loss, and excessive position deviation

Product Overview Supporting Products Data Download

Product Diagram

Driver Terminal Description

(1) Control Terminals

Terminal Name	Description
5V	Analog control interface, can be used as speed control input signal, can use the driver's 5V external potentiometer control, or use external analog control.
AI
GND
AO	Analog output interface, outputs 0-5V analog voltage
GND	Analog output interface, outputs 0-5V analog voltage
PUL+	External pulse mode: used as pulse signal input, signal voltage supports 5V-24V; pulse input mode: pulse + direction (used as pulse port), dual pulse (used as CW port); pulse effective edge adjustable, default pulse rising edge effective; to reliably respond to pulse signals, pulse width should be greater than 2.5μs.
PUL-
DIR+	External pulse mode: used as direction input port, signal voltage supports 5V-24V; pulse input mode: pulse + direction (used as direction port), dual pulse (used as CCW port); high/low level signal, to ensure reliable motor direction change, direction signal should be established at least 5μs before pulse signal.
DIR-
ENA+	Enable control signal, this input signal is used to enable or disable the output of driver axis 1 and axis 2. When ENA is connected to low level (or internal optocoupler conduction), the driver will cut off the current of each motor phase, making the motor free and not responding to step pulses. When this function is not needed, the enable signal terminal can be left floating. (Signal voltage supports 5-24V)
ENA-
BRK+	Brake control signal, can be changed to positioning completion signal, requires external power supply, drives external relay.
BRK-
ALM+	Alarm output signal, requires external 24V power supply; when axis 1 motor alarm occurs, signal is output through alarm port. (Default is normally open interface, i.e., signal output when alarm occurs; can be changed to normally closed output by software communication parameter PA-21 set to 1, i.e., signal disconnects when alarm occurs.)
ALM-

(2) Motor/Power Wiring Terminals

Terminal Name	Description
B-	Motor phase A and phase B winding interface Motor rotation direction can be switched via PN-27
B+
A-
A+
AC	Voltage input terminal: supports DC: 30~110 VDC; AC: 24~80V Recommended power supply DC48V, 12A or AC60V, 10A and above
AC

(3) Encoder Wiring Terminals

Terminal Name	Description
EGND	Motor encoder power negative terminal
E5V	Motor encoder power positive terminal (Voltage +5V)
EZ-	Motor encoder Z phase negative feedback pulse pin
EZ+	Motor encoder Z phase positive feedback pulse pin
EA-	Motor encoder A phase negative feedback pulse pin
EA+	Motor encoder A phase positive feedback pulse pin
EB-	Motor encoder B phase negative feedback pulse pin
EB+	Motor encoder B phase positive feedback pulse pin

Alarm Handling

Blink Count	Description	Fault Handling
ERR001	Overcurrent	1. Motor power line short circuit or motor fault; 2. Motor phase sequence wiring, check phase sequence; 3. Incorrect motor model setting, check motor model; 4. Overload, try running without load first to see if normal; 5. Gain parameter set too high, reduce gain parameter; 6. Internal driver fault, return to factory for repair.
ERR002	Overvoltage	1. Check if supply voltage is too high, reduce voltage or replace power supply; 2. Internal driver fault, return to factory for repair.
ERR003	Undervoltage	1. Check if supply voltage is too low, reduce voltage or replace power supply; 2. Internal driver fault, return to factory for repair.
ERR004	Phase Loss	1. Check if motor wires are broken or plugs are not properly connected; 2. Replace motor to determine if motor is faulty; 3. Motor phase sequence error, check if motor power wires are connected incorrectly; 4. Internal driver fault, return to factory for repair.
ERR006	Position Deviation	1. Check if encoder is disconnected or plug is not properly connected; 2. Check if mechanical structure is stuck, causing motor stall; 3. Motor phase sequence error, connect according to motor label color order; 4. Check if incorrect subdivision causes speed mismatch during installation.
ERR008	EEPROM	Initialize parameters and restart to see if the alarm still occurs. If the alarm persists, return to the factory for repair.

Main application areas

Suitable for automation equipment and instruments in various motion control fields, such as electronic processing and inspection, semiconductor packaging, laser cutting and welding, laser typesetting, packaging machinery, engraving machines, marking machines, cutting machines, garment plotters, CNC machine tools, automated assembly equipment, etc.