Control Techniques UD70 User Manual

UD70
Issue code: 70nu2
6-16 Serial communications
6.6 Example ANSI instructions
The following program fragment gives an example of reading a speed
reference from a Unidrive, and writing it to a CD Drive.
Both Drives are connected to the RS485 bus. The Unidrive is at address 11;
the CD Drive is at address 12.
For this program to operate, the RS485 mode should be set at 6.
BACKGROUND{
top:
// send read command to read parameter #1.21
result% = ANSIREAD(11, “0121”)
IF result% = 0 THEN
PRINT “Message could not be sent”
GOTO top:
ENDIF
CALL get
_reply: // get reply from read command
IF reply% <= –65536 THEN // valid reply?
PRINT “Error in reading data from Unidrive”
GOTO top:
ENDIF
// send write command to CD, using 1 decimal place
result% = ANSIWRITE(12,”SP”, reply%, 1)
IF result% = 0 THEN
PRINT “Message could not be sent”
GOTO top:
ENDIF
CALL get
_reply: // write accepted?
IF reply% <> -65540 THEN // –65540 is ACK
PRINT “Error in sending message to CD”
ENDIF
GOTO top:
}
get_reply: { // sub-routine to wait for a reply
timeout% = 0 // reset timer
DO
// returns –65536 if the reply has not been received yet
reply% = ANSIREPLY
LOOP WHILE reply% = –65536 AND timeout% < 50
// loop exits only when a reply has been received, or
// a time-out has occurred.
// if the clock task is set at 5ms, the timeout will be 250ms
}
CLOCK {
timeout% = timeout% + 1 // increment timeout variable
}
Note
Refer to the help file in the DPL Toolkit for further
examples of the ANSI commands.

Control Techniques UD70 Specifications

General

Brand	Control Techniques
Model	UD70
Category	Control Unit
Language	English

Summary

Safety Information

General Information

Introduction to UD70 and DPL Toolkit

UD70 Overview and DPL Toolkit Basics

Explains the UD70 as a microcomputer for Unidrive flexibility and the DPL Toolkit for software development.

UD70 Memory and PC Requirements

Details UD70 memory storage and minimum PC specifications for DPL Toolkit.

Technical Data and User Knowledge

Lists UD70 technical specifications and assumes basic Windows knowledge for users.

Installation and Configuration

Installation Procedure

Instructions for physically fitting the UD70 module into the Unidrive.

System Configuration and DPL Toolkit Setup

Details host PC connections (RS232) and installing the DPL Toolkit.

DPL Toolkit Operations

DPL Toolkit Overview and File Management

Introduces the DPL Toolkit's capabilities and file handling procedures.

Editing Programs and Applying Styles

Covers editing code, using styles, and auto-indent features within the DPL Toolkit.

Compiling and Running Programs

Details the process of compiling DPL programs and executing them on the UD70.

Serial Communications

Serial Communications Introduction

Explains serial communication links using RS485 for UD70 systems.

Hardware Connections and ANSI Protocol

Details RS485 hardware connections, ANSI communications fundamentals, and frames.

Serial Modes and ANSI Instructions

Outlines various RS485 modes and available ANSI instructions for communication.

Reference Guide

UD70 Tasks and Programming Structures

Explains different task types (INITIAL, BACKGROUND, CLOCK) and their roles in UD70 programming.

DPL Instructions and Functions Reference

Details various DPL programming instructions and mathematical/signal-processing functions.

UD70 Features

PLC Parameters and Feature Introduction

Introduces PLC parameters and the UD70's advanced position control and profile generation capabilities.

Encoder Lines, Position, and Controller Setup

Explains encoder line units, position calculation, and enabling the position controller.

Default Values and Parameter Descriptions

Details default reset values and provides descriptions for various UD70 parameters.

Logic Diagrams and Digital Lock Control

Illustrates logic diagrams for position control and explains digital lock functions.

Cam Function and Reference Switching

Describes the cam function for slave axis control and switching between control modes.

Timer/Counter Unit and Digital I/O Ports

Details the UD70's timer/counter unit and digital I/O port functionality.

Memory Storage and RS232 Communications

Covers non-volatile memory storage and using the RS232 port for Drive-to-Drive communication.

Diagnostics and Error Handling

Run-time Errors and Trip Codes

Explains run-time errors, their causes, and provides a list of trip codes with their actions.

Compiler Errors and Advanced Error Handling

Lists compiler error messages and details advanced error handling using the ERROR Task.

UD70 Parameters

Set-up Parameters and RS485 Modes

Details UD70 set-up parameters and the various RS485 port modes available.

Virtual Parameters and Control Words

Explains virtual parameters and the function of control and status words.

General-Purpose Parameters and I/O Box Configuration

Lists general-purpose parameters and details I/O box configuration through menus.