JMC JASD Series Servo Drives

JMC JASD20002-20B stock photo

JMC JASD7502-20B stock photo

Overview

Chinese servo drives by JMC (Just Motion Control, aka Shenzhen Just Motion Control Electromachics Co.,Ltd.) that support both incremental ABZ/UVW encoders as well as Tamagawa 17-bit (and maybe 23-bit?) encoders. It is meant for use with their JASM series servo motors.

Model Numbers

V1.3 manual:

Page 14 (13 in the PDF) shows the servo drive model number scheme
Page 16 (15 in the PDF) shows the servo motor model number scheme

V1.0 manual:

Page 9 shows the servo drive model number scheme
Page 11 shows the servo motor model number scheme

Wiring Diagram

V1.3 manual:

Page 18 (17 in the PDF) shows an overview of the wiring
Page 19 (18 in the PDF) shows how to wire single phase vs three phase
Page 20 (19 in the PDF) shows the locations and descriptions of the various ports/terminals
Page 21 (20 in the PDF) shows the CN1 "Control" connector pinout
Page 25 (24 in the PDF) shows the CN2 "Encoder" connector pinout
Page 27 (26 in the PDF) shows the CN3/CN4 "Communication" ports (CAN and RS-485)
Page 28 (27 in the PDF) shows the CN5 "RS-232" connector
Page 28 (27 in the PDF) shows the power terminal strip pinout
Page 39 (38 in the PDF) shows example wiring for position mode control
Page 45 (44 in the PDF) shows example wiring for velocity mode control
Page 47 (46 in the PDF) shows example wiring for torque mode control

V1.0 manual:

Page 12 shows the CN1 "I/O" connector pinout
Page 14 shows the CN2 "Feedback" connector pinout
Page 15 shows the CN3 "Communication 1" connector pinout (RS-232 and RS-485)
Page 15 shows the CN4 "Communication 2" connector pinout (RS-485 only)
Page 16 shows the power terminal strip pinout
Page 24 shows example wiring for position mode control
Page 26 shows example wiring for velocity mode control
page 28 shows example wiring for torque mode control

Servo motor V1.0 manual:

Page 23 (22 in the PDF) shows the motor power and encoder cable pinouts

Dimensions

V1.3 manual:

page 30 (29 in the PDF) shows the dimensions

V1.0 manual:

Page 17 shows the dimensions

Software

"software for JMC 220v ac servo motor driver (JASD4002,JASD7502,JASD15002)":

1911130370.zip (Wayback Machine)

From:

Software -Support-Shenzhen Just Motion Control Electromechanics Co., Ltd.

The RS-232 baud rate corresponds to the setting PA00-21, even parity, 1 stop bit. The slave address seems to be set from PA00-23. It seems to only want to communicate over RS-232 and not RS-485, though maybe there is a trick to it.

Micro USB Pin	Direction	DE9 Pin (DTE)	Function
1 (VCC)	drive → PC		+3.3V (for isolator?)
2 (D-)	drive → PC	2 (RXD)	PC's RS-232 RX in
3 (D+)	drive ← PC	3 (TXD)	PC's RS-232 TX out
4 (ID)
5 (GND)	drive ↔ PC	5 (GND)	GND (digital common)

To be able to write certain groups of parameters, you must "unlock" them either from the servo drive keypad using AF_unL, or by changing parameter P10-22, which cannot be navigated to by the keypad. You must instead do it over RS-485 or RS-232 via the PC software. The software has an unlock dialog that requires the passwords: the "Primary authority" password is jmc and the "Super authority" password is jmc2018, which allow you to access the P10-xx parameters.