Watlow CLS200, MLS300 and CAS200 Manual de usuario descargar pdf (Pagina 3)

Contents

Communications Speciﬁcation i

Contents

Overview........................................................................ 1

In This Manual ............................................................ 1

Chapter 1: ANAFAZE/AB Protocol............................. 3

Protocol Syntax

.................................................................3

Control Codes.............................................................. 3

Transaction Sequence.................................................. 4

Packet Format.............................................................. 6

Codes in a Packet ........................................................ 6

Error Checking

..................................................................8

Block Check Character (BCC).................................... 8

Cyclic Redundancy Check (CRC)............................... 9

Examples

...........................................................................10

Block Read .................................................................. 10

Block Write ................................................................. 13

Message Data

....................................................................14

Data for a Read Command.......................................... 14

Data for a Write Command ......................................... 15

Two-Byte Data Types ................................................. 15

Figuring Block Size..................................................... 15

Anafaze/AB Data Table Summary

....................................16

Ordering of Heat and Cool Channel Parameters......... 17

Ordering of Ramp-Soak Profile Parameters................ 17

Anafaze/AB Protocol Data Table................................ 17

Chapter 2: Modbus-RTU Protocol............................... 21

Overview

...........................................................................21

Transactions on Modbus-RTU Networks ................... 21

The Query-Response Cycle......................................... 22

Serial Transmission..................................................... 22

Message Framing ........................................................ 23

CRC Error Checking ................................................... 25

Function Codes............................................................ 26

Writing Data................................................................ 30

Reading Data............................................................... 30

Examples

...........................................................................31

Read Examples............................................................ 31

Write Examples........................................................... 32

Modbus-RTU Data Table Summary

..................................33

Ordering of Heat and Cool Channel Parameters......... 34

Ordering of Ramp-Soak Profile Parameters................ 34

Relative and Absolute Modbus Addresses.................. 35

Modbus-RTU Protocol Data Table ............................. 35

1 2 3 4 5 6 7 8 ... 91 92

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Watlow CLS200, MLS300 and CAS200 Manual de usuario Pagina 3

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