Rockwell-automation 2098-DSD-xxx Ultra3000 Host Commands for Serial In Manual de usuario descargar pdf (Pagina 13)

1 Publication 2098-RM003A-EN-P October 2001

Chapter

1

Communications Protocol

Introduction

The drive command protocol is similar to others in the industry. It is a

master - slave protocol where the host computer is the master and the

drive is the slave. This chapter provides details on the following

aspects of the Ultraware Serial Communications Protocol:

• Command Format

• Host Command Description

• Drive Response Description

• Exception Responses

Command Format

The command format is shown below:

Each letter represents a single ASCII character. In the address,

parameter, function, data, and checksum fields, the characters should

all be ASCII hex values, i.e., they should be in the range 0 through 9

and A through F (upper case only).

All commands begin with a colon (0x3A), and terminate with a

carriage return (0x0D).

Host Command Description

The address field is made up of two characters. These characters

supply the address of the drive that the command is intended for. For

example, a host addressing drive #2 would have 0x02. The address

field allows drive addresses from 0x00 through 0xFD, or 254

individual drives.

The parameter field specifies the parameter in the drive that is being

accessed, which can range from 000 to 7FF, or 2048 possible

parameters.

Start Address Parameter Function Data Checksum End

: a a p p p f d ... d c c <cr>

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 175 176

Comentarios a estos manuales

Sin comentarios