Siemens S7-200 Smart with Modbus RTU Encoder

Siemens S7-200 Smart with Modbus RTU Multi Loop Encoder

　　Mechanical gears, no batteries, no counting,Measure angle、measure length、A versatile speed tester

*Internal value code wheel, mechanical gear set with multiple turns, fully digital value calculation.

*Standard Modbus RTU output, convenient for connecting various PLCs and upper computer devices.

*EasyPro software settings are versatile and multifunctional, directly corresponding to single turn and multi turn angle, multi turn length, and rotation and translation speed measurements.

*Multiple address settings; Communication baud rate setting, resolution, and direction setting.

*The external positioning line is set to a preset position, easy to install, and does not require changing.

Characteristic parameters:

Working voltage: 10... 30Vdc polarity protection

Current consumption:<40mA (24Vdc) No load

Output signal: Standard Modbus output, compliant with GB/Z19582 standard, can set length, angle, speed application output

Single cycle resolution: 4096 and 8192 optional

Continuous turns: 1 to 4096 turns

Repetition accuracy: repeatability ± 2BIT (actual accuracy is related to installation accuracy and axis concentricity)

EasyPro: Address can be set, communication baud rate can be set (9.6K~11.52K), and can be connected to PLC via Modbus signal; RS485 signal to RS232 or USB connection to computer for EasyPro intelligent settings

Signal adjustment: adjustable resolution and direction settings; Preset position, external setting, such as external zero setting

Working temperature: -20~80 ℃

Storage temperature: -40~80 ℃

Protection level: IP65

Vibration impact: 10g, 10-2000Hz; 100g，6ms

Allowable speed: 2400 revolutions per minute

Connecting cable: 1-meter shielded cable radially out (other forms can be ordered)

Appearance features: Metal shell, sealed double bearing structure

MODBUS protocol (client version)

Programming is only allowed when the line is set to high level, and the encoder will respond to commands. You need to power on again to enter programming mode.

When programming, the default communication rate is 19200 bps, with 1 stop bit and 1 even parity bit, using Modbus/RTU protocol.

The programming protocol includes the following instructions:

A、 Read the main measurement value instruction

Send 01H 04H 00H 01H 00H 04H A0H 09H to read measurement values

Note: 01H is the encoder communication address (LocalAddress), 04H is the command word, 00H 01H is the data address, 00H

04H is the data length, A0H 09H is the checksum.

Response 01H 04H 08H 00H 00H 32H 4BH 00H 00H 30H F1H 51H 95H

Note: 01H is the encoder communication address (LocalAddress), 04H is the command word, 08H is the data byte length, 00H 00H 01H

00H is the measurement value data, 00H 00H 30H F1H bit velocity data, and 51H 95H is the verification code.

Attachment: Only in calibration mode, when reading measurement values, a command to read the number of turns will be sent, with the data address being 00H 03H.

B、 Read parameter instruction

Send 01H 03H 00H 44H 00H 02H 84H 1EH to read the working mode parameter values

Note: 01H is the encoder communication address (LocalAddress), 03H is the command word, 00H 44H is the data address, 00H

02H is the data length, and 84H 1EH is the checksum.

Response 01H 03H 04H 00H 00H 00H 00H 00H FBH 84H

Note: 01H is the encoder communication address (LocalAddress), 03H is the command word, 04H is the data byte length, 00H 00H 00H

00H is the parameter value, FBH 84H is the checksum.

C、 Modify parameter instruction

发送 01 H 10H 00H 44H 00H 02H 04H 00H 00H 00H 00H F6H 6CH

Modify the parameter values of the working mode

Note: 01H is the encoder communication address (LocalAddress), 10H is the command word, 00H 44H is the parameter address, 00H

02H is the data length, 04H is the data byte length, 00H 00H 00H 00H is the parameter value, and F6H 6CH is the checksum.

Response 01H 10H 00H 44H 00H 02H 01H DDH

Note: 01H is the encoder communication address (LocalAddress), 10H is the command word, 00H 44H is the parameter address, 00H

02H is the data length, and 01H DDH is the checksum.

When in normal working condition, using Modbus/RTU protocol, only the command to read the main measurement value can be sent