Fastech Ezi-Step Plus-R User Manual

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Communication Protocols
1) Overview of communication FRAME
2) Basic structure of Frame
Header
Frame Data
Tail
0xAA 0xCC
5~252 bytes
0xAA 0xEE
① 0xAA : Delimited byte
② 0xAA 0xCC: Indicate header of the frame .
③ 0xAA 0xEE: Indicate tail of the frame .
④ If any of the Frame data is ‘0xAA’, ‘0xAA’ should be added right after it. (byte
stuffing)
⑤ If any data following ‘0xAA’ is not ‘0xAA’, ‘0xCC’ or ‘0xEE’, it indicates an error.
Detailed Frame Data is configured as follows:
Slave ID
Frame type
Data
CRC
1 byte
1 byte
0~248 bytes.
2 bytes
Low byte
High byte
① Slave ID: Dive module number (0~15) connected to the PC communication port.
② Frame type: Designate command type of relevant frames. For the command type, refer to
「Frame Type and Data Configuration」section.
③ Data: Data structure and length is set according to Frame type. For more information,
refer to 「Frame Type and Data Configuration 」section.
④ CRC: To check an error which occurs during communication, ‘0xA001’ of a polynomial
factor in CRC(Cyclic Redundancy Check ). ‘X16+X15+X2+1’ of a polynomial factor in
CRC-16-IBM (Cyclic Redundancy Check) is used. CRC calculation is performed for all items
(Slave ID, Frame type, Data) prior to CRC item.
1－1－3．CRC Calculation Example
The following program source is included in a file (file name: CRC_Checksum.c) provided with
the product.
1)‘0xA001’of CRC16
const unsigned short TABLE_CRCVALUE[] =
{
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
PC Communication
Port #n
Ezi-STEP
Plus-R
Sending Frame
Response Frame

Fastech Ezi-Step Plus-R Specifications

General

Brand	Fastech
Model	Ezi-Step Plus-R
Category	Controller
Language	English

Summary

Communication Protocols

Communication Functions and Specifications

Covers communication functions, RS-485 protocol, specifications, and CRC calculation.

Frame Structure and Data Configuration

Details frame types, data configuration, parameter lists, and I/O pin setup.

Status Flags and Motor Information

Explains status flags, position table items, and motor information.

Programming Methods

Describes the primary methods for programming the Ezi-STEP Plus-R.

Library for PC Program

Library Configuration and Drive Link Functions

Details library setup, return values, and core drive link functions.

Parameter, I/O, and Servo Control

Functions for parameter management, servo control, and digital I/O operations.

Motion, Status, and Position Table Control

Covers position, drive status, running control, and position table functions.

Other Control Functions

Specific functions for trigger output control and status.

Protocol for PLC Program

PLC Communication Protocol Details

Guidelines for implementing communication protocols for PLC programming.