Emerson USB Fieldbus Interface Instrukcja Użytkownika Pobierz pdf (Strona 6)

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Software

www.emersonct.com

Multi-tasking Architecture

SyPT’s multi-tasking

architecture allows easy

implementation and

segmentation to simplify

“real-time” process

control algorithms

and fixed-time base

calculations. The designer can select those jobs that

require highest attention and those that only need

occasional attention in order to optimize coprocessor

utilization.

User programmable tasks listed in order of execution

priority:

Initial – runs system variable initialization and

pre-calculations at reset and power-up

Event – similar to hardware interrupt. Can be triggered

by a high-speed digital input, counter/time unit, or

fieldbus-synchronizing message.

Speed (Unidrive family only) – synchronized task to the

internal drive speed loop.

Clock – runs from a User-assigned time clock, selectable

5 – 100 mSec. High priority clocked tasks can be set as

short as 1 mSec.

Background – runs when no other tasks are dispatched

(asynchronous)

Error – runs when an error occurs, for recovery

processing

PC Specifications:



Single-user license with hardware key



Microsoft Windows 3.1x, 9x, NT, 2000, ME

and XP compatible



486 processor (minimum); Pentium processor

or higher recommended



8 MB RAM, 20 MB of free hard disk space



RS232 port

SyPT Interface:



Multi-drive connection through CTNet

network via ISA or PCMCIA network

interface card



Single-drive connection through an

RS232 link (cable: #CTD-PC-232-008) with

Unidrive / Mentor / Quantum. RS485 link

(cable: CT Comms Cable) with Unidrive SP.

SyPT Lite Programming (Unidrive SP only)

SyPT Lite is a single-drive programming tool designed

for simple and intermediate level programming of

custom applications. SyPT Lite can be used to program

the built-in PLC controller in a base Unidrive SP or a

Unidrive SP equipped with an SM-Apps Lite option

module.

Specifications

Hardware Tasks

Executable

Memory

Number of

Downloads

Base Drive PLC Background 4k 100

SM-Apps Lite

Background

or clock

10k 100,000

PLC Ladder Diagram

1 2 3 4 5 6 7 8 9 10 11 ... 22 23

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