Products

GSA-M Series Single Turn Modbus Absolute Encoder

GSA-M Series encoder is a single turn bus-based Modbus absolute encoder, it can provide max 16bits sing-trun resolution, with options of housing Dia.:38,50,58mm; Solid/hollow Shaft Diameter:6,8,10mm, Output Code: Binary, Gray, Gray Excess, BCD; Supply Voltage:5v,8-29v;  MODBUS is a request/reply protocol and offers services specified by function codes. MODBUS function codes are elements of MODBUS request/reply PDUs. The objective of this document is to describe the function codes used within the framework of MODBUS transactions. MODBUS is an application layer messaging protocol for client/server communication between devices connected on different types of buses or networks.

▶Housing Diameter:38,50,58mm;

▶Solid/hollow Shaft Diameter:6,8,10mm;

▶Interface: Modbus;

▶Resolution: Single turn max.16bits;

▶Supply Voltage:5v,8-29v;

▶Output Code: Binary, Gray, Gray Excess, BCD;

▶Widely used in various fields of automatic control and measurement system,such as machinery manufacturing, shipping, textile, printing, aviation, military industry Testing machine, elevator, etc.

▶Vibration-resistant, corrosion-resistant, pollution-resistant;

Main Introduction

♦ Transmission Interface：RS-485. Add：1～254.（Default to be 01）

♦ Baud Rate：4800，9600（Default），19200，38400. Communication

♦ Medium：STP.

♦ Date Frame Format：1 start bit，8 Data bit，1 Even Parity bit, 1 stop bit，Non-control flow.

Message Format:

1.Command word(CW) 03H：Read Location Value

Master Request(MASTRQ)：Address | Command Word | Parameter Address | Data Length | Check Code

Slave Response：Address | Command Word | Byte Length | Parameter Values | Check Code

2.Command word(CW) 10H：Preset Current Position Value

Master Request(MASTRQ)：Address | Command Word | Parameter Address | Data Length | Byte Length | Parameter Values | Check Code

Slave Response：Address | Command Word | Parameter Address | Data Length | Check Code

3.Command word(CW) 06H：Write Parameter Value

Master Request(MASTRQ)：Address | Command Word | Parameter Address | Parameter Value| Check Code

Slave Response：Address | Command Word | Parameter Address | Parameter Value | Check Code

Read Location Value：

Master Query Location Value：01H 03H 00H 00H 00H 02H C4H 0BH

Note：01H-Adress | 03H-Command Word | 00H 00H-Register Address | 0H 02H-Data Length（Unit:Word）| C4H 0BH- CRC Check

Slave Response： 01H 03H 04H 01H F4H 00H 01H 7BH FDH

Note：01H-Adress | 03H-Command Word | 04H Data Length（Unit: Byte）| 01H F4H 00H 01H-Location Data | 7BH FDH- CRC Check

Parameter Setting (Take effect after re power up)：

Parameter Sheet：

Note 1).Register Address 0044H, Length 0001H, Data High Byte Fixed to be 00H，Low Byte to be Changed ID；

(2).Register Address 0045H, Length 0001H, Data High Byte Fixed to be 00H，Low Byte to be Baud Rate；

(3).Register Address 0046H, Length 0001H, Data High Byte Fixed to be 00H，Low Byte be Counting Direction;

(4).Register Address 004AH, Length 0002H, Four bytes from High to low be Current preset Location Value（Note not to Exceed physical position limit）；

Parameter Changing Example：

a . Change ID（01H à 02H）：

Master Send：01H 06H 00H 44H 00H 02H 48H 1EH

Slave Response：02H 06H 00H 44H 00H 02H 48H 2DH

Note：01H-address | 06H-command word | 00H 44H-Rigester Address | 00H 02H-Data | 48H 1EH-CRC Check(48H 2DH-CRC Check)

b. Change Baud Rate (BR change to be 04H-38400bps)：

Master Send：01H 06H 00H 45H 00H 04H 99H DCH

Slave Response：01H 06H 00H 45H 00H 04H 99H DCH

Note：01H-Address|06H-Command Word|00H 45H-Register Address|00H 04H-Data|99H DCH- CRC Check

c．Change Counting Direction (Counting Direction 01H-Anti-clockwise，Current Location Value Must Be set After Change)

Master send：01H 06H 00H 46H 00H 01H A9H DFH

Slave Response：01H 06H 00H 46H 00H 01H A9H DFH

Note：01H-address|06H-command word|00H 46H-Register Address|00H 01H-Data|A9H DFH- CRC Check

d. Set Current Position Value(current position Value change to be 00000000H)

Master Send：01H 10H 00H 4AH 00H 02H 04H 00H 00H 00H 00H 77H E0H

Note：01H-address|10H-command word|00H 4AH-register address|00H 02H-data length（Unit:Word）|04H-Data Length（Unit:Byte）|00H 00H 00H 00H-Data|77H

B5H- CRC Check

Slave Response：01H 10H 00H 4AH 00H 02H 60H 1EH

Note：01H-address|10H-command word|00H 4AH-register address|00H 02H-data length（Unit:Word）A0H DCH-CRC ChecL 

Five steps let you know how to select your encoder:
1.If you’ve already used encoders with other brands, plz feel free to send us the information of the brand info and encoder info, like model no, etc, our engineer will advise you with our euqivalent replacement at a high cost performance;
2.If you want to find an encoder for your application, plz first select encoder type: 1) Incremental encoder 2) Absolute encoder 3) Draw Wire Sensors 4) Manual Pluse Generator
3. Choose your output format(NPN/PNP/LINE DRIVER/PUSH PULL for incremental encoder) or interfaces(Parallel, SSI, BISS, Modbus, CANopen, Profibus, DeviceNET, Profinet, EtherCAT, Power Link, Modbus TCP);
4. Select the resolution of the encoder, Max.50000ppr for Gertech incremental encoder, Max.29bits for Gertech Absolute Encoder;
5. Select the housing Dia and shaft dia. of the encoder;
Gertech is popular equivalent replacement for similar foreign products such as Sick/Heidenhain/Nemicon/Autonics/ Koyo/Omron/Baumer /Tamagawa/Hengstler /Trelectronic/Pepperl+Fuchs/Elco/Kuebler ,ETC.

Gertech Equivalent replace:
Omron:
E6A2-CS3C, E6A2-CS3E, E6A2-CS5C, E6A2-CS5C,
E6A2-CW3C, E6A2-CW3E, E6A2-CW5C, E6A2-CWZ3C,
E6A2-CWZ3E, E6A2-CWZ5C; E6B2-CS3C, E6B2-CS3E, E6B2-CS5C, E6A2-CS5C,E6B2-CW3C, E6B2-CW3E, E6B2-CW5C, E6B2-CWZ3C,
E6B2-CWZ3E, E6B2-CBZ5C; E6C2-CS3C, E6C2-CS3E, E6C2-CS5C, E6C2-CS5C,E6C2-CW3C, E6C2-CW3E, E6C2-CW5C, E6C2-CWZ3C,
E6C2-CWZ3E, E6C2-CBZ5C;
Koyo: TRD-MX TRD-2E/1EH, TRD-2T, TRD-2TH, TRD-S, TRD-SH, TRD-N, TRD-NH, TRD-J TRD-GK, TRD-CH Series
Autonics: E30S, E40S, E40H,E50S, E50H, E60S, E60H Series

Packaging Details
The rotary encoder is packed in standard export packaging or as required by buyers;

FAQ:
About Delivery:

Leading time: Delivery can be within a week after full payment by DHL or other logics as per requested; 

About Payment:

Payment can be made through bank transfer, west union and Paypal;

Quality Control:

Professional and experienced quality inspection team leaded by Mr. Hu, can ensure the quality of each product when it leaves the factory.Mr. Hu has more than 10 years experience in the industries of encoders,

About technique support:

Professional and experienced technique team leaded by Doctor Zhang, has accomplished  many breakthroughs in the development of encoders, apart from normal incremental encoders, Gertech now has finished Profinet, EtherCAT, Modbus-TCP and Powe-rlink development;

Certificate:

CE,ISO9001,Rohs and KC is under process;

About Inquiry:

Any inquiry will be replied within 24 hours, and customer also can add what’s app or wechat for Instant messaging, our marketing team and technical team will offer professional service and suggestion;

Guarantee policy:

Gertech offers 1year warranty and life-long technical support;

We’re here to help. Our engineers and encoder experts will respond quickly to your toughest, most technical encoder questions.

Expedite options are available on many models. Contact us for details:Terry_Marketing@gertechsensors.com;