Table of Contents

I/O UDP

264

UDP Unicast Format

264

UDP Broadcast Packet

264

Analog Section

265

Digital/Relay Section

266

Serial Pin Signal Section

266

UDP Unicast Example

267

I/O Modbus Slave

267

Modbus Serial Application Connected to the Serial Port

267

Modbus Serial Application Connected to the Network

267

Modbus TCP Application

268

Modbus I/O Access

268

Function Codes

268

I/O Coil/Register Descriptions

269

Serial Port Coil/Register Descriptions

270

A4/T4 Registers

270

A4D2/A4R2 Registers

271

D4/D2R2 Registers

272

Serial Pin Signals

272

TruePort I/O

273

TruePort/Modbus Combination

273

API Over TruePort Only

274

Accessing I/O Data Via TruePort

275

Introduction

275

Setup

275

Format of API Commands

276

Get Commands

276

Command Format

276

Response Format

276

Set Commands

277

Command Format

277

Successful Response Format

278

Unsuccessful Response Format

278

Error Codes

279

I/O SNMP Traps

279

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Perle Systems SCS, STS manual Udp