Honeywell UDC 2300, UDC 3000, UDC 3300, UDC 5000, UDC 6000 User Manual

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UDC 2300 UDC 3000 UDC 3300 UDC 5000 UDC 6000 UDC 6300

Universal Digital Controllers

RS422/485 ASCII Communications

Option

Product Manual

51-51-25-35G

5/99

Rev G, 5/99

While this information is presented in good faith and believed to be accurate, Honeywell disclaims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customer.

In no event is Honeywell liable to anyone for any indirect, special, or consequential damages. The information and specifications in this document are subject to change without notice.

This document was prepared using Information Mapping® methodologies and formatting principles.

UDC 2300, UDC 3000, UDC 3300, UDC 5000, UDC 6000, and UDC 6300 are U.S. trademarks of Honeywell Inc.

Information Mapping® is a registered trademark of Information Mapping, Inc.

Honeywell

Industrial Automation and Control

Automation College

100 Virginia Drive

Fort Washington, PA 19034

ii RS422/485 ASCII Communications Option Product Manual 5/99

About This Publication

The UDC manual for RS422/485 ASCII communications option contains the following sections:

Section 1 – Overview

Section 2 – Installation Section 3 – Establishing Communications Section 4 – Read and Write Operations Section 5 – Reading, Writing, and Overriding Parameters on UDC 3000

Versa-Pro Controllers

Section 6 – Reading, Writing and Overriding Parameters on UDC 5000

Ultra-Pro Controllers

Section 7 – Reading, Writing, and Overriding Parameters on UDC 6000

Process Controllers

Section 8 – Reading, Writing, and Overriding Parameters on UDC 6300

Process Controllers

Section 9 – Reading, Writing, and Overriding Parameters on UDC 3300

Process Controllers

Section 10 – Reading, Writing, and Overriding Parameters on UDC 2300

Process Controllers Section 11 – Operating the Controller with Communications Option Section 12 – ASCII Conversion Table Section 13 – Cable Specifications

Communication between your computer and the UDC Controller is accomplished for one piece of information (parameter) at a time. Each parameter has an associated identifying code.

The Identifying Code and Format Code will be listed along with information pertaining to that parameter.

The identifying codes are grouped in the same order as they appear in the controller configuration prompts.

5/99 RS422/485 ASCII Communications Option Product Manual iii

Contents

SECTION 1 – OVERVIEW..................................................................................................1

1.1 Introduction...................................................................................................1

1.2 Message Exchange Protocols ......................................................................2

1.3 Field Upgrade...............................................................................................3

SECTION 2 – INSTALLATION...........................................................................................5

2.1 Introduction...................................................................................................5

2.2 RS232 to RS485 Converters........................................................................6

2.3 Using a Black Box Converter........................................................................7

2.4 Using a Westermo Converter .......................................................................9

2.5 Wiring Diagrams.........................................................................................11

SECTION 3 – ESTABLISHING COMMUNICATIONS AND TESTING ............................15

3.1 Preparing the Controller for Communications.............................................15

3.2 Programming..............................................................................................19

3.3 Message Exchange....................................................................................20

3.4 Request Messages.....................................................................................21

3.5 Response Messages..................................................................................24

3.6 Status Codes..............................................................................................26

3.7 Checksum Protocol (for Data Security) ......................................................28

3.8 Shed ...........................................................................................................34

3.9 Loopback (UDC 2300, UDC 3000, UDC 3300 Only)..................................35

3.10 Recovering from Communications Failures................................................37

SECTION 4 – READ AND WRITE OPERATIONS...........................................................41

4.1 Read Operations.........................................................................................41

4.2 Read Analog Parameters ...........................................................................42

4.3 Read Digital Parameters.............................................................................45

4.4 Write Operations.........................................................................................47

4.5 Write Analog Parameters............................................................................48

4.6 Write Digital Parameters.............................................................................52

SECTION 5 – READ, WRITE AND OVERRIDE PARAMETERS – UDC3000.................55

5.1 UDC 3000 Overview...................................................................................55

5.2 UDC 3000 Reading Control Data ...............................................................57

5.3 UDC 3000 Read Option Status...................................................................58

5.4 UDC 3000 Miscellaneous Read Only’s.......................................................59

5.5 UDC 3000 Setpoints...................................................................................61

5.6 UDC 3000 Using a Computer Setpoint.......................................................62

5.7 UDC 3000 Overriding Input 1 .....................................................................63

5.8 UDC 3000 Canceling the Override.............................................................64

5.9 UDC 3000 Reading or Changing the Output..............................................65

5.10 UDC 3000 Local Setpoint/PID Set Selection /Setpoint Ramp Status.........66

5.11 UDC 3000 Configuration Parameters.........................................................68

SECTION 6 – READ, WRITE AND OVERRIDE PARAMETERS – UDC5000.................85

6.1 Overview.....................................................................................................85

6.2 Reading Control Data.................................................................................88

6.3 Option Status..............................................................................................89

iv RS422/485 ASCII Communications Option Product Manual 5/99

6.4 Miscellaneous Read Only’s........................................................................ 90

6.5 Setpoints.................................................................................................... 92

6.6 Using a Computer Setpoint........................................................................ 93

6.7 Overriding the Inputs.................................................................................. 95

6.8 PV, Setpoint, or Input Override Status or Cancellation.............................. 97

6.9 Reading or Changing the Output ............................................................... 98

6.10 Local Setpoint/PID Selection/Setpoint Ramp Status.................................. 99

6.11 Configuration Parameters ........................................................................ 101

SECTION 7 – READ, WRITE AND OVERRIDE PARAMETERS – UDC6000............... 127

7.1 Overview .................................................................................................. 127

7.2 Reading Control Data............................................................................... 130

7.3 Read Options Status................................................................................ 131

7.4 Miscellaneous Read Only’s...................................................................... 132

7.5 Setpoints.................................................................................................. 134

7.6 Using a Computer Setpoint...................................................................... 135

7.7 PV or Setpoint Override Selections.......................................................... 137

7.8 Reading or Changing the Output ............................................................. 138

7.9 Local Setpoint/PID Selection/Setpoint Ramp Status................................ 139

7.10 Configuration Parameters ........................................................................ 142

SECTION 8 – READ, WRITE AND OVERRIDE PARAMETERS – UDC6300............... 177

8.1 Overview .................................................................................................. 177

8.2 Reading Control Data............................................................................... 180

8.3 Read Options Status................................................................................ 181

8.4 Miscellaneous Read Only’s...................................................................... 182

8.5 Setpoints.................................................................................................. 186

8.6 Using a Computer Setpoint...................................................................... 187

8.7 PV or Setpoint Override Selections.......................................................... 189

8.8 Reading or Changing the Output ............................................................. 190

8.9 Local Setpoint/PID Selection/Setpoint Ramp Status................................ 191

8.10 Configuration Parameters ........................................................................ 194

SECTION 9 – READ, WRITE AND OVERRIDE PARAMETERS – UDC3300............... 231

9.1 UDC 3300 Overview ................................................................................ 231

9.2 UDC 3300 Reading Control Data............................................................. 234

9.3 UDC 3300 Read Options Status.............................................................. 235

9.4 UDC 3300 Miscellaneous Read Only’s.................................................... 236

9.5 UDC 3300 Setpoints ................................................................................ 238

9.6 UDC 3300 Using a Computer Setpoint.................................................... 239

9.7 UDC 3300 PV or Setpoint Override Selections........................................ 241

9.8 UDC 3300 Reading or Changing the Output............................................ 242

9.9 UDC 3300 Local Setpoint/PID Selection/Setpoint Ramp Status.............. 243

9.10 UDC 3300 Configuration Parameters ...................................................... 246

SECTION 10 – READ, WRITE AND OVERRIDE PARAMETERS – UDC2300............. 277

10.1 UDC 2300 Overview ................................................................................ 277

10.2 UDC 2300 Reading Control Data............................................................. 280

10.3 UDC 2300 Read Options Status.............................................................. 281

10.4 UDC 2300 Miscellaneous Read Only’s.................................................... 282

10.5 UDC 2300 Setpoints ................................................................................ 284

10.6 UDC 2300 Using a Computer Setpoint.................................................... 285

10.7 UDC 2300 PV or Setpoint Override Selections........................................ 287

10.8 UDC 2300 Reading or Changing the Output............................................ 288

10.9 UDC 2300 Local Setpoint/PID Selection/Setpoint Ramp Status.............. 289

10.10 UDC 2300 Configuration Parameters ...................................................... 292

5/99 RS422/485 ASCII Communications Option Product Manual v

SECTION 11 – OPERATING THE CONTROLLER WITH COMMUNICATIONS

OPTION....................................................................................................311

11.1 Operation..................................................................................................311

SECTION 12 – ASCII CONVERSION TABLE................................................................312

12.1 Overview...................................................................................................312

SECTION 13 – CABLE SPECIFICATIONS....................................................................314

13.1 Introduction...............................................................................................314

vi RS422/485 ASCII Communications Option Product Manual 5/99

Figures

Figure 2-1 Black Box Converter Wiring Connections .................................................... 8

Figure 2-2 Recommended Switch Settings for Westermo Converter.......................... 10

Figure 2-3 Westermo Converter Wiring Connections.................................................. 10

Figure 2-4 UDC3000/3300 Connections ..................................................................... 11

Figure 2-5 UDC6000/6300 Connections ..................................................................... 12

Figure 2-6 Connections (without Digital Input Option)................................................. 13

Figure 2-7 UDC2300 Connections .............................................................................. 14

Figure 3-1 Message Exchanges.................................................................................. 20

Figure 3-2 Request Message Fields............................................................................ 21

Figure 3-3 Response Message Fields Information...................................................... 24

Figure 3-4 Request Format for Checksum Protocol.................................................... 28

Figure 3-5 Example of Checksum Calculation............................................................. 30

Figure 3-6 Using Checksum Protocol.......................................................................... 31

Figure 3-7 Success Response Message Fields .......................................................... 32

Figure 3-8 Failure Response Message Fields............................................................. 33

Figure 3-9 Lost Messages........................................................................................... 37

Figure 3-10 Timing a Message Exchange and Checking for a Response..................... 38

Figure 4-1 Read Analog Parameter Message Exchange............................................ 44

Figure 4-2 Read Digital Parameter Message Exchange ............................................. 46

Figure 4-3 Write Analog Parameter Message Exchange Example ............................. 51

Figure 4-4 Write Digital Parameter Message Exchange Example............................... 54

Figure 5-1 Option Status Information .......................................................................... 58

Figure 5-2 I.D. Code 250 Indications........................................................................... 67

Figure 5-3 Digital Input Combinations......................................................................... 84

Figure 6-1 Option Status Information .......................................................................... 89

Figure 6-2 I.D. Code 250 Indications......................................................................... 100

Figure 7-1 Option Status Information ........................................................................ 131

Figure 7-2 I.D. Code 250 Indications......................................................................... 140

Figure 7-3 Digital Input Combinations....................................................................... 172

Figure 8-1 Option Status Information ........................................................................ 181

Figure 8-2 I.D. Code 250 Indications......................................................................... 192

Figure 8-3 Digital Input Combinations, Inputs 1 and 2............................................... 225

Figure 9-1 Option Status Information ........................................................................ 235

Figure 9-2 I.D. Code 250 Indications......................................................................... 244

Figure 9-3 Digital Input Combinations, Inputs 1 and 2............................................... 272

Figure 10-1 Option Status Information ........................................................................ 281

Figure 10-2 I.D. Code 250 Indications......................................................................... 290

5/99 RS422/485 ASCII Communications Option Product Manual vii

Tables

Table 1-1 Rules and Regulations for Configuration Protocol........................................2

Table 1-2 Upgrade PWB Part Numbers........................................................................3

Table 2-1 Converters....................................................................................................6

Table 2-2 Black Box Converter Wiring Connections Procedure ...................................7

Table 2-3 Terminal Connections for Black Box Converters..........................................8

Table 2-4 Westermo Converter Configuration and Wiring Procedure ..........................9

Table 2-5 Terminal Connections for Westermo Converters........................................10

Table 3-1 Communications Parameters .....................................................................15

Table 3-2 Controller Procedure for Communication Parameters................................17

Table 3-3 Programming Statements...........................................................................19

Table 3-4 Request Message Fields Definitions...........................................................22

Table 3-5 Response Message Fields Definitions........................................................25

Table 3-6 Request Message Status Codes................................................................26

Table 3-7 UDC Status Codes .....................................................................................27

Table 3-8 Calculating the Checksum Procedure ........................................................29

Table 3-9 Example of Loopback Request Message ...................................................35

Table 3-10 Example of Loopback Response Message.............................................36

Table 3-11 Programming Example............................................................................36

Table 4-1 Analog Parameter Request Format............................................................42

Table 4-2 Analog Parameter Response Format.........................................................43

Table 4-3 Digital Parameter Request Format.............................................................45

Table 4-4 Digital Parameter Response Format ..........................................................46

Table 4-5 Write Message Exchange Steps.................................................................47

Table 4-6 Write Request Format for Analog I.D. Codes.............................................48

Table 4-7 Busy Response...........................................................................................49

Table 4-8 Ready Requests.........................................................................................49

Table 4-9 Is Ready Response ....................................................................................50

Table 4-10 Write Request Format for Digital I.D. Codes...........................................52

Table 4-11 Busy Response .......................................................................................53

Table 4-12 Ready Request........................................................................................53

Table 4-13 Is Ready Response.................................................................................53

Table 5-1 Control Data Parameters – UDC3000........................................................57

Table 5-2 Option Status..............................................................................................58

Table 5-3 Miscellaneous Read Only’s.........................................................................59

Table 5-4 Error Status Definitions...............................................................................60

Table 5-5 Setpoint Code Selections ...........................................................................61

Table 5-6 Setpoint Associated Parameters ................................................................61

Table 5-7 Computer Setpoint Selection......................................................................62

Table 5-8 Computer Setpoint Associated Parameters................................................62

Table 5-9 Input 1 Override Code ................................................................................63

Table 5-10 Input Override Associated Parameters....................................................63

Table 5-11 PV or Setpoint Override Cancellation......................................................64

Table 5-12 Reading or Changing the Output.............................................................65

Table 5-13 Associated Output Codes........................................................................65

Table 5-14 LSP/PID Set Selection and Setpoint Ramp Status..................................66

Table 5-15 Setup Group-Tuning................................................................................69

Table 5-16 Setup Group-SP Ramp, Rate, or SP Program........................................71

Table 5-17 Setup Group-Adaptive Tune....................................................................74

Table 5-18 Setup Group-Algorithm............................................................................75

Table 5-19 Setup Group-Input 1................................................................................76

Table 5-20 Setup Group-Input 2................................................................................78

Table 5-21 Setup Group-Control ...............................................................................79

viii RS422/485 ASCII Communications Option Product Manual 5/99

Table 5-22 Setup Group-Options.............................................................................. 81

Table 5-23 Setup Group-COMRS422....................................................................... 82

Table 5-24 Setup Group-Alarms............................................................................... 83

Table 6-1 Control Data Parameters – UDC5000........................................................ 88

Table 6-2 Option Status ............................................................................................. 89

Table 6-3 Miscellaneous Read Only’s........................................................................ 90

Table 6-4 Error Status Definitions.............................................................................. 91

Table 6-5 Setpoint Code Selections........................................................................... 92

Table 6-6 Setpoint Associated Parameters................................................................ 92

Table 6-7 Computer Setpoint Selections.................................................................... 93

Table 6-8 Computer Setpoint Associated Parameters............................................... 94

Table 6-9 Input Override Codes................................................................................. 95

Table 6-10 Input Override Associated Parameters................................................... 96

Table 6-11 PV, Setpoint , or Input Override Cancellation ......................................... 97

Table 6-12 Reading or Changing the Output............................................................ 98

Table 6-13 Associated Output Codes....................................................................... 98

Table 6-14 I.D. Code 250 Reads .............................................................................. 99

Table 6-15 I.D. Code 250 Writes............................................................................. 100

Table 6-16 Setup Group-Tuning (Loop 1)*.............................................................. 102

Table 6-17 Setup Group-Tuning 2* (Loop 2)........................................................... 103

Table 6-18 Setup Group-Setpoint Ramp/Program.................................................. 104

Table 6-19 Setpoint Program Ramp and Soak Identifying Codes for Each Segment106

Table 6-20 Setup Group-Autotune/Adaptive Tune.................................................. 107

Table 6-21 Setup Group-Algorithm......................................................................... 109

Table 6-22 Setup Group-Output Algorithm ............................................................. 112

Table 6-23 Setup Group-Input 1 (Loop 1 Address only) ......................................... 113

Table 6-24 Setup Group-Input 2 (Loop 1 Address only) ......................................... 115

Table 6-25 Setup Group-Input 3 (Loop 1 Address only) ......................................... 118

Table 6-26 Setup Groups-Control and Control 2 .................................................... 120

Table 6-27 Setup Group-Options............................................................................ 122

Table 6-28 Setup Group-Communications.............................................................. 123

Table 6-29 Setup Group-Alarms............................................................................. 124

Table 6-30 Setup Groups-Display........................................................................... 126

Table 7-1 Control Data Parameters – UDC6000...................................................... 130

Table 7-2 Option Status ........................................................................................... 131

Table 7-3 Miscellaneous Read Only’s...................................................................... 132

Table 7-4 Error Status Definitions............................................................................ 133

Table 7-5 Setpoint Code Selections......................................................................... 134

Table 7-6 Setpoint Associated Parameters.............................................................. 134

Table 7-7 Computer Setpoint Selection.................................................................... 135

Table 7-8 Computer Setpoint Associated Parameters............................................. 136

Table 7-9 PV or Setpoint Override Selections.......................................................... 137

Table 7-10 Reading or Changing the Output.......................................................... 138

Table 7-11 Associated Output Codes..................................................................... 138

Table 7-12 I.D. Code 250 Reads ............................................................................ 139

Table 7-13 I.D. Code 250 Writes............................................................................. 141

Table 7-14 Setup Group-Tuning (Loop 1)*.............................................................. 143

Table 7-15 Setup Group-Tuning 2* (Loop 2)........................................................... 145

Table 7-16 Setup Group-Setpoint Ramp/Rate........................................................ 147

Table 7-17 Setup Group-Adaptive Tune................................................................. 148

Table 7-18 Setup Group-Algorithm......................................................................... 149

Table 7-19 Setup Group-Advanced Math ............................................................... 154

Table 7-20 Setup Group-Output Algorithm ............................................................. 159

Table 7-21 Setup Group-Input 1 (Loop 1 Address only) ......................................... 160

Table 7-22 Setup Group-Input 2 (Loop 1 Address only) ......................................... 161

Table 7-23 Setup Group-Input 3 (Loop 1 Address only) ......................................... 162

Table 7-24 Setup Group-Input 4 (Loop 1 Address only) ......................................... 163

5/99 RS422/485 ASCII Communications Option Product Manual ix

Table 7-25 Setup Group-Input 5 (Loop 1 Address only)..........................................164

Table 7-26 Setup Group-Control and Control 2.......................................................166

Table 7-27 Setup Groups-Options...........................................................................169

Table 7-28 Setup Group-Communications..............................................................173

Table 7-29 Setup Group-Alarms (Loop 1 Address only)..........................................174

Table 7-30 Setup Group-Display.............................................................................175

Table 8-1 Control Data Parameters – UDC6300......................................................180

Table 8-2 Option Status............................................................................................181

Table 8-3 Miscellaneous Read Only’s.......................................................................182

Table 8-4 Error Status Definitions.............................................................................185

Table 8-5 Setpoint Code Selections .........................................................................186

Table 8-6 Setpoint Associated Parameters ..............................................................186

Table 8-7 Computer Setpoint Selection....................................................................187

Table 8-8 Computer Setpoint Associated Parameters..............................................188

Table 8-9 PV or Setpoint Override Selections..........................................................189

Table 8-10 Reading or Changing the Output...........................................................190

Table 8-11 Associated Output Codes......................................................................190

Table 8-12 I.D. Code 250 Reads.............................................................................191

Table 8-13 I.D. Code 250 Writes.............................................................................193

Table 8-14 Setup Group-Tuning (Loop 1)*..............................................................195

Table 8-15 Setup Group-Tuning 2* (Loop 2)...........................................................197

Table 8-16 Setup Group-Setpoint Ramp/Rate ........................................................199

Table 8-17 Setup Group-Adaptive Tune..................................................................200

Table 8-18 Setup Group-Algorithm..........................................................................201

Table 8-19 Setup Group-Advanced Math................................................................207

Table 8-20 Setup Group-Output Algorithm..............................................................212

Table 8-21 Setup Group-Input 1 (Loop 1 Address only)..........................................213

Table 8-22 Setup Group-Input 2 (Loop 1 Address only)..........................................214

Table 8-23 Setup Group-Input 3 (Loop 1 Address only)..........................................215

Table 8-24 Setup Group-Input 4 (Loop 1 Address only)..........................................216

Table 8-25 Setup Group-Input 5 (Loop 1 Address only)..........................................217

Table 8-26 Setup Group-Control and Control 2.......................................................219

Table 8-27 Setup Groups-Options...........................................................................222

Table 8-28 Setup Group-Communications..............................................................227

Table 8-29 Setup Group-Alarms (Loop 1 Address only)..........................................228

Table 8-30 Setup Group-Display.............................................................................230

Table 9-1 Control Data Parameters – UDC3300......................................................234

Table 9-2 Option Status............................................................................................235

Table 9-3 Miscellaneous Read Only’s.......................................................................236

Table 9-4 Error Status Definitions.............................................................................237

Table 9-5 Setpoint Code Selections .........................................................................238

Table 9-6 Setpoint Associated Parameters ..............................................................238

Table 9-7 Computer Setpoint Selection....................................................................239

Table 9-8 Computer Setpoint Associated Parameters..............................................240

Table 9-9 PV or Setpoint Override Selections..........................................................241

Table 9-10 Reading or Changing the Output...........................................................242

Table 9-11 Associated Output Codes......................................................................242

Table 9-12 LSP/PID Set Selection and Setpoint Ramp Status................................243

Table 9-13 I.D. Code 250 Writes.............................................................................245

Table 9-14 Setup Group-Tuning (Loop 1)*..............................................................247

Table 9-15 Setup Group-Tuning 2* (Loop 2)...........................................................249

Table 9-16 Setup Group-Setpoint Ramp/Rate ........................................................251

Table 9-17 Setup Group-Adaptive Tune..................................................................254

Table 9-18 Setup Group-Algorithm..........................................................................255

Table 9-19 Setup Group-Output Algorithm..............................................................260

Table 9-20 Setup Group-Input 1 (Loop 1 Address only)..........................................261

Table 9-21 Setup Group-Input 2 (Loop 1 Address only)..........................................263

Table 9-22 Setup Group-Input 3 (Loop 1 Address only)..........................................265

x RS422/485 ASCII Communications Option Product Manual 5/99

Table 9-23 Setup Group-Control and Control 2...................................................... 266

Table 9-24 Setup Groups-Options.......................................................................... 269

Table 9-25 Setup Group-Communications.............................................................. 273

Table 9-26 Setup Group-Alarms (Loop 1 Address only)......................................... 274

Table 9-27 Setup Group-Display............................................................................. 276

Table 10-1 Control Data Parameters – UDC2300 .................................................. 280

Table 10-2 Option Status........................................................................................ 281

Table 10-3 Miscellaneous Read Only’s................................................................... 282

Table 10-4 Error Status Definitions......................................................................... 283

Table 10-5 Setpoint Code Selections...................................................................... 284

Table 10-6 Setpoint Associated Parameters........................................................... 284

Table 10-7 Computer Setpoint Selection................................................................ 285

Table 10-8 Computer Setpoint Associated Parameters.......................................... 286

Table 10-9 PV or Setpoint Override Selections ...................................................... 287

Table 10-10 Reading or Changing the Output.......................................................... 288

Table 10-11 Associated Output Codes..................................................................... 288

Table 10-12 LSP/PID Set Selection and Setpoint Ramp Status............................... 289

Table 10-13 I.D. Code 250 Writes............................................................................. 291

Table 10-14 Setup Group-Timer............................................................................... 293

Table 10-15 Setup Group-Tuning ............................................................................. 293

Table 10-16 Setup Group-Setpoint Ramp/Rate........................................................ 295

Table 10-17 Setup Group-Adaptive Tune................................................................. 298

Table 10-18 Setup Group-Algorithm......................................................................... 299

Table 10-19 Setup Group-Input 1 ............................................................................. 300

Table 10-20 Setup Group-Input 2 ............................................................................. 304

Table 10-21 Setup Group-Control............................................................................. 306

Table 10-22 Setup Group-Communications.............................................................. 308

Table 10-23 Setup Group-Alarms............................................................................. 309

Table 11-1 Emergency Manual Procedure ............................................................. 311

Table 12-1 ASCII Character Codes ........................................................................ 312

Table 12-2 Hexadecimal to Binary.......................................................................... 313

Table 13-1 Cable Specifications.............................................................................. 314

5/99 RS422/485 ASCII Communications Option Product Manual xi

Parameters

ADDRESS 2.................................................................... Communication Address (Loop 2)

ADDRESS....................................................................... Communication Address (Loop 1)

BAUD RATE................................................................................... Baud Rate (bits/second)

COM STATE........................................................................................Communication State

CSP BIAS..................................................................................Commun. SP Bias (Loop 1)

CSP RATIO..............................................................................Commun. SP Ratio (Loop 1)

CSP2 BIAS................................................................................Commun. SP Bias (Loop 2)

CSP2 RATIO............................................................................Commun. SP Ratio (Loop 2)

DUPLEX....................................................................................................Duplex Operation

PARITY.........................................................................................................................Parity

SHED MODE..........................................................Controller Shed Mode and Output Level

SHED SP............................................................................................. Shed Setpoint Recall

SHED TIME..........................................................................................................Shed Time

TX DELAY............................................................................................. Transmission Delay

UNITS..................................................................................................Communication Units

xii RS422/485 ASCII Communications Option Product Manual 5/99

References

Publication

Title

UDC 3000 Controller Product Manual UDC 3000 Limit Controller Product Manual UDC 5000 Controller Product Manual UDC 6000 Controller Product Manual UDC 6300 Controller Product Manual UDC 6300 Indicator Product Manual UDC 3300 Controller Product Manual UDC 3300 Limit Controller Product Manual UDC 2300 Controller Product Manual

Publication

Number

51-52-25-07 51-52-25-09 51-51-25-17 51-52-25-32 51-52-25-45 51-52-25-46 51-52-25-55 51-52-25-56 51-52-25-73

5/99 RS422/485 ASCII Communications Option Product Manual xiii

xiv RS422/485 ASCII Communications Option Product Manual 5/99

1.1 Introduction

Section 1 – Overview

The communications option

Monitor or slave mode

Message exchanges

The RS422/485 Communications Option on the UDC Controller provides

a serial multi-drop link whereby up to fifteen UDC controllers connect

directly to a host computer.

The UDC controller can be placed in monitor or slave by the host

computer. When monitored, the controller will send Configuration,

Tuning, and Operating parameters to the host computer. When in slave,

the controller will be switched through the communications interface

board to "Slave" operation. This means that the computer can write

configuration or tuning information into any controller on the link

including overriding of PV, the setpoint, and output.

The computer and the controllers talk to each other through a series of

message exchanges. There are two RS422/485 message exchange

protocols: Configuration or Loopback.

5/99 RS422/485 ASCII Communications Option Product Manual 1

1.2 Message Exchange Protocols

Configuration protocol

Table 1-1 lists the rules and regulations of configuration protocol.

Table 1-1 Rules and Regulations for Configuration Protocol

Protocol Rule

Data Type Transactions

Read Read transactions can be performed in either UDC state:

Write Write transactions can only be performed in the Slave

Busy Following any Write message, a Busy indication is

Ready A Ready transaction is required as the next message

Transaction Limits In a Write transaction, only single items are permitted to

The configuration protocol permits reading or writing of data type transactions such as PV, SP, or Output, as well as configuration type transactions such as Tuning, Algorithm selections, etc.

Monitor or Slave.

mode.

returned.

request to determine if the information received was correct.

be written, however, for Read transactions, single or multi-item parameters may be requested.

Loopback

Checksum

Controller Address

Keyboard Configuration

Loopback protocol is also provided for link tests. With this message exchange you can test the Communications link between your computer and the controllers on the link. The host computer sends a series of ASCII characters to the desired device, and the device returns the characters it received to the host computer.

There is an optional transaction called "Checksum" which is used to increase security on the RS422/485 link. Used with any message exchange, it enables both your computer and controller to detect messages that have been interrupted by line noise.

Each controller will have its own specific address. If you have a 2 loop controller, there will be a specific address for each loop.

Address, Baud Rate, and Parity are keyboard selectable as well as Shed Time, Shed Mode, and Output Level.

2 RS422/485 ASCII Communications Option Product Manual 5/99

1.3 Field Upgrade

Adding the communications option

ATTENTION

RS422/485 Communications Option can be added in the field by installing

the proper RS422/485 Printed Wiring Board Assembly.

Table 1-2 lists the part numbers required to add the RS422/485

Communication option Printed Wiring Board to the UDC controllers.

Table 1-2 Upgrade PWB Part Numbers

Model Upgrade PWB Part Numbers

UDC 2300 Part Number 51309831-501 UDC 3000 Part Number 30756693-501 UDC 3300 Part Number 30756693-501 or

Part Number 30756687-502 (Aux Out/RS-485)

UDC 5000 Part Number 30755865-502 UDC 6000 Part Number 30755865-501 UDC 6300 Part Number 30755865-504

Early version UDC 5000 with 28-pin PROM cannot be upgraded to

RS422/485 unless the PROM socket has 32-pin receptacles.

5/99 RS422/485 ASCII Communications Option Product Manual 3

4 RS422/485 ASCII Communications Option Product Manual 5/99

2.1 Introduction

Section 2 – Installation

General

Electrical noise protection

What’s in this section

The Installation section (Section 2) of the UDC Product Manual contains

information and drawings required to mount and wire the controller. Refer

to the Controller Product Manual for appropriate information regarding

the basic installation requirements.

When installing and wiring the controller, follow the practices that

conform to all local codes and ordinances. In addition, be aware of the

precautions you should take to avoid electrical noise.

Electrical noise is unwanted electrical signals that provide undesirable

effects. Digital equipment is especially sensitive to the effects of electrical

noise. The controller has built-in circuits to reduce the effects of this

noise.

For information concerning further reduction of electrical noise, refer to

"How to Apply Digital Instrumentation in Severe Electrical Noise

Environments" – in the UDC Controller Product Manual or Honeywell

Document 51-52-05-01.

This section contains the following information:

Topic See Page

2.1 Introduction General Electrical Noise Protection

5 5 5

2.2 RS232 to RS485 Converters 6

2.3 Using a Black Box Converter Wiring the Black Box converter and the link Wiring connections Link devices terminal connections

2.4 Using a Westermo Converter Wiring the Westermo converter and the link Configuring the Westermo converter and the link Wiring connections Link devices terminal connections

2.5 Wiring Diagrams 11

7 7 8 8

9 10 10 10

5/99 RS422/485 ASCII Communications Option Product Manual 5

2.2 RS232 to RS485 Converters

Overview

Converters

Up to 16 devices on an RS485 link can be connected to your computer by installing a Black Box or Westermo RS232 to RS485 converter between the RS232 port on your computer and the devices on the RS485 link. These devices include:

• UDC2300, UDC3000, UDC 5000, UDC3300, UDC6000, or UDC6300 Controllers with an RS485 Communications Option

Table 2-1 lists the specific information needed to procure either of these converters.

Table 2-1 Converters

Arrangement Description

Black Box

Converter

Using the RS232 port and a Black Box RS232 to RS485 converter installed between the RS232 port and the first device on the link.

This converter is available from . . .

Black Box Corp Pittsburgh PA..

Westermo

Converter (Europe)

Model

IC109A - Stand alone RS232 to RS485/422 converter

with opto-isolation

Using the RS232 port and a Westermo RS232 to RS485 converter installed between the RS232 port and the first device on the link.

The Westermo converter can be ordered from a Honeywell sales office, Part Number 46210088-001.

A 2 meter shielded cable with Female/Male DB9/DB25 connectors for use between the PC communication port and the Westermo box is also available, Part Number 46210061-002

6 RS422/485 ASCII Communications Option Product Manual 5/99

2.3 Using a Black Box Converter

Wiring the Black Box converter and the link

Figure 2-1 shows the wiring diagram and terminal connections for wiring the RS232 to RS485 Black Box converter.

Follow the procedure in Table 2-2 to wire the Black Box converter. Table 2-3 shows the terminal designation for the devices on the link.

Table 2-2 Black Box Converter Wiring Connections Procedure

Step Action

1 Install an appropriate Serial Communication Connector between the

Computer serial port and the RS232 input connector of the Black Box converter.

interfacing signals.

2 Connect one wire to terminal 2 (–). 3 Connect other wire to terminal 1 (+). 4 Connect a 120 ohm resistor across 1 and 2. 5 Set the jumpers on the Black Box converter Printed Circuit Board as

follows:

See the Black Box data sheet for the required

JUMPER SETTING

XW1A DCE W8 B-C (2-wire) W15 B-C (Data Enabled) W5 A-B (RTS/CTS delay - normal) W9 C (0 msec) W17 C (2 msec) W16 B (0.1 msec) S1 OUT (Normal) S2 ON (RS485 Receiver Terminated) S3 ON (Line Bias On)

6 Create a chain of up to 16 devices by connecting them with shielded

twisted pair wiring (Belden 9271 Twinax or equivalent) to a maximum total length of 4000 feet(1250 meters).

(See Section 12—Cable Specifications.)

REFER TO TABLE 2-3 FOR TERMINAL DESIGNATIONS OF THE DEVICES ON THE LINK

5/99 RS422/485 ASCII Communications Option Product Manual 7

2.3 Using a Black Box Converter, Continued

Black Box wiring connections

Figure 2-1 shows the wiring for the Black Box converter and the devices on the link.

Figure 2-1 Black Box Converter Wiring Connections

Shield

Computer

RS232

output

Black Box

Converter

1 2 3

120 Ohm Resistor

–

1ST Device

on Link

To other devices on link Maximum 16 addresses

120 ohm resistor between A and B

on last device on link

22937A

Link devices terminal connections

Table 2-3 lists the terminal connections between the Black Box converter and the devices on the communication link.

Table 2-3 Terminal Connections for Black Box Converters

BLACK BOX UDC3000

2 152311 14 1 142212 13

UDC3300

UDC6000 UDC6300

UDC5000 UDC2300

8 RS422/485 ASCII Communications Option Product Manual 5/99

2.4 Using a Westermo Converter

Wiring the Westermo converter and the link

Figure 2-2 shows the recommended switch setting for the WESTERMO converter.

Figure 2-3 shows the wiring diagram and terminal connections for wiring the RS485 Westermo converter.

Follow the procedure in Table 2-4 to configure and wire the Westermo converter.

Table 2-5 shows the terminal designation for the devices on the link. Table 2-4 Westermo Converter Configuration and Wiring Procedure

Step Action

1 Install an appropriate Serial Communication Connector between the

Computer serial port and the RS232 input connector of the Westermo converter. See the Westermo data sheet for the required interfacing signals.

2 Configure the switch settings on the Westermo converter as shown in

Figure 2-6.

3 Connect the shield to terminal 5. See Figure 2-3. 4 Connect one wire to terminal 3 (–). 5 Connect other wire to terminal 4 (+). 6 Connect a 120 ohm resistor across terminals 3 and 4. 7 Create a chain of up to 16 Devices by connecting them with shielded

twisted pair wiring (Belden 9271 Twinax or equivalent) to a maximum total length of 4000 feet(1250 meters). (See Section 13—Cable Specifications.)

REFER TO TABLE 2-5 FOR TERMINAL DESIGNATIONS OF THE DEVICES ON THE LINK

5/99 RS422/485 ASCII Communications Option Product Manual 9

2.4 Using a Westermo Converter, Continued

Configuring the WESTERMO

Figure 2-2 shows the recommended switch settings for the WESTERMO converter.

Converter

Figure 2-2 Recommended Switch Settings for Westermo Converter

S1 S3 S2

Westermo wiring connections

230

OFF

12345

Power

Supply

Figure 2-3 shows the wiring for the Westermo converter and the devices on the link.

Line Connection

Figure 2-3 Westermo Converter Wiring Connections

OFF

V 24/RS-232-C

23456

CONNECTION

22933

Computer

RS232

output

Link devices terminal connections

Westermo

Converter

5 4 3 2 1

Twisted pair shield – connect shield wire with supplied crimp connector

120 Ohm Resistor

Shield

Table 2-5 shows the terminal connections between the Westermo converter and the devices on the communication link.

Table 2-5 Terminal Connections for Westermo Converters;

Westermo

Line Connections

3 15112314 4 14122213

UDC 3000 UDC 3300

UDC 5000 UDC 6000

UDC 6300

–

1ST Device

on Link

To other devices on link Maximum 16 addresses

120 ohm resistor between A and B

on last device on link

22937

UDC 2300

10 RS422/485 ASCII Communications Option Product Manual 5/99

2.5 Wiring Diagrams

Communications option connections

Figure 2-4: UDC3000 and UDC3300 Figure 2-5: UDC6000 and UDC6300 Figure 2-6: UDC5000 Figure 2-7: UDC 2300

Figure 2-4 UDC3000/3300 Connections

RS422/485

HALF DUPLEX

12 13 14 15

CAUTION

Do not mix half and full duplex wiring.

SHD TX+/RX+

TX–/RX–

To Other

Communication

Instruments

(maximum 15)

Master

SHD

TX+/RX+

120 Ohm

TX–/RX–

Do not run these

lines in the same

conduit as AC power

120 Ohm Resistor

on Last Leg

Resistor

12 13

14 15 16 17

Use shielded twisted pair cables

(Belden 9271 Twinax or equivalent)

RS422/485

FULL DUPLEX

SHD RX+ RX– TX+ TX–

Communication

To Other

Instruments

(maximum 15)

Master

SHD

TX+

TX– RX+ RX–

Do not run these

lines in the same

conduit as AC power

120 Ohm Resistor

on Last Leg

120 Ohm

Resistor

120 Ohm

Resistor

24169A

5/99 RS422/485 ASCII Communications Option Product Manual 11

2.5 Wiring Diagrams, Continued

Figure 2-5 UDC6000/6300 Connections

COMMUNICAT ION MASTER

(A) (RTN) (B)

D+

SHLD

21 22 23

D+

D–

TO OTHER

COMMUNICATION

CONTROLLERS

D+D–

120 OHMS ON LAST LEG

120 OHMS

Connect shield wires together with Honeywell

supplied crimp part number 30755381-001

Do not run these lines in the same conduit as AC power.

21758A.ppt

12 RS422/485 ASCII Communications Option Product Manual 5/99

2.5 Wiring Diagrams, Continued

Figure 2-6 UDC5000 Connections (without Digital Input Option)

Communication

Master

D+ SHLD D-

11 12

Optional Communicati on

To Other

Communication

Controllers

Do not run these lines in the same conduit as AC power

Required for CE Mark Compliance - Kit supplied Part Number

51197612-508 contains 8 Ferrite filters

22330A.ppt

5/99 RS422/485 ASCII Communications Option Product Manual 13

2.5 Wiring Diagrams, Continued

Figure 2-7 UDC2300 Connections

COMMUNICAT ION MASTER

(A) (RTN) (B)

D+

SHLD

D–

13 14

D+

D–

TO OTHER

COMMUNICATION

CONTROLLERS

120 OHMS

Connect shield wires together with Honeywell

supplied crimp part number 30755381-001

Do not run these lines in the same conduit as AC power.

D+D–

120 OHMS ON LAST LEG

21758B.ppt

14 RS422/485 ASCII Communications Option Product Manual 5/99

Section 3 – Establishing Communications and Testing

3.1 Preparing the Controller for Communications

Introduction

Synchronization

Configurable parameters

Each controller on the RS422/485 Communications link must be configured at the controller level for certain parameters before communications between the Host and the Controller can be accomplished.

Before you attempt to exchange messages between your computer and the controllers on the RS422/485 link, you must set up the controller for the same form of data transmission that the host computer’s RS422/485 interface uses. This is called Synchronization.

You must match the controller Baud Rate and Parity with that of your computer.

Table 3-1 is a list of parameters that should be configured, their definitions, range of settings or selections, the procedure for entering the information into the controller is found in Table 3-2.

Table 3-1 Communications Parameters

Parameter Definition

Communications State

Enables or disables the Communication function in the controller.

Communications Address

Shed Term used to describe a point in time when the controller,

Shed Time The number selected will represent how many sample

Duplex Selection made for transmission type. Two-wire

TX Delay Configurable response delay timer allows you to force the

This is a number that is assigned to a controller (limited to 15 controllers) that will be used during communications. This number will be its address on the link (address 0-99).

If your controller has two loops, each loop must have its own individual address (i.e. Loop 1, #6; Loop 2, #7).

which had been working as a slave, reverts to an independent, stand alone controller using its own inputs, configuration data and control mode. Shed will happen when a controller is in slave, the shed is not zero, and the communication stops.

periods will elapse before the controller sheds from computer control. Each period equals 1/3 second. 0 = No shed.

transmission is half duplex. Four-wire transmission is full duplex.

UDC to delay its response for a time period of from 1 to 500 milliseconds. Compatible with the host system hardware/software.

5/99 RS422/485 ASCII Communications Option Product Manual 15

3.1 Preparing the Controller for Communications, Continued

Parameters, continued

Table 3-1 Communications Parameters, Continued

Parameter Definition

Shed Controller Mode and Output Level

Shed Setpoint Recall

This selection determines the mode of local control whenever the controller is SHED from the slave mode.

• Last Mode and Output – The controller will return to the same mode (Manual or Automatic) and Output level that it was in before shed.

• Manual Mode, Last Output – The controller will return to manual mode and the last output level it was in before shed.

• Manual Mode, Failsafe Output – The controller will return to manual mode at the output level selected at ID code 40 – Failsafe Output Value.

• Shed to Automatic Mode – The controller will return to automatic mode.

This selection determines what setpoint will be used if the controller is shed from the communications link.

• TO LSP – The controller will use the last local setpoint stored.

• TO CSP – The controller will store the last computer setpoint and use it at the Local Setpoint (LSP1, LSP2, or LSP3, whichever is in use).

Parity Transmitting each ASCII character requires 8 bits:

• 7 bits for the character code

• 1 bit (the eighth) for Parity, which may represent either ODD or EVEN parity.

Thus, the controller can accommodate your computer's choice of parity (odd or even) and perform parity checks on your computer's data transmission. The controller will return STATUS CODE 04 if it detects incorrect parity.

Baud Rate This is the transmission speed in bits per second. In

order to communicate properly, the controller must be set to the same Baud Rate as your computer. The Baud Rate selections are: 300, 600, 1200, 2400, 4800, 9600, or 19,200.

Communication Units

Communications Setpoint Ratio

Communications Setpoint Bias

This selection determines how the controller values are expressed during communications:

Percent of span or Engineering units. Ratio value for computer setpoint. The range is from

-20.00 to +20.00.

Bias value for computer setpoint. The range is from

-999 to 9999.

16 RS422/485 ASCII Communications Option Product Manual 5/99

3.1 Preparing the Controller for Communications, Continued

Procedure

The procedure in Table 3-2 tells you what keys to press on the controller keyboard, the upper and lower display indications, and the range of settings available to you.

Not all prompts may be available for your particular controller.

Use ▲▼ to make adjustments to the range of setting or selection.

Table 3-2 Controller Procedure for Communication Parameters

Step Press Lower Display Upper Display

Range of Setting

or Selection

SET

FUNC

COMMUN

successive presses of the [FUNCTION] key will sequentially display all the functions and their values or selections.

COM STATE DISABLE

DMCS RS422

ADDRESS 01 to 99*

* Address 00 disconnects it from the link

Parameter Description

Communication State

Communication Address (Loop 1)

ADDRESS 2 01 to 99* (must be different

from Loop 1)

* Address 00 disconnects it from the link

SHED TIME 0 to 255

Sample periods 0 = No Shed will occur

PARITY ODD

EVEN

BAUD RATE 300 4800

600 9600 1200 19200 2400

SHED MODE LAST FAILSAFE

TO MAN TO AUTO

SHED SP TO LSP

TO CSP

DUPLEX HALF

FULL

TX DELAY 1 to 500 milliseconds Transmission Delay

Communication Address (Loop 2)

Shed Time

Parity

Baud Rate (bits/second)

Controller Shed Mode and Output Level

Shed Setpoint Recall

Duplex Transmission Type

Timer

5/99 RS422/485 ASCII Communications Option Product Manual 17

3.1 Preparing the Controller for Communications, Continued

Procedure, continued

Table 3-2 Controller Procedure for Communication Parameters, Continued

Step Press Lower Display Upper Display

Range of Setting

or Selection

UNITS PERCENT

ENG UNITS

CSP RATIO –20.00 to +20.00 Commun. SP Ratio

CSP BIAS –999 to +9999 Commun. SP Bias

CSP2 RATIO –20.00 to +20.00 Commun. SP Ratio

CSP2 BIAS –20.00 to +20.00 Commun. SP Bias

LOWR

DISP

TO RETURN TO NORMAL CONTROL

Parameter Description

Communication Units

(Loop 1)

(Loop 2)

18 RS422/485 ASCII Communications Option Product Manual 5/99

3.2 Programming Your Computer

Introduction

Request

Response

Example

To program your computer for communication with the various controllers on the link, you write input and output statements to send and receive ASCII character strings to and from the controller. (See ASCII and Hexadecimal conversion table in Section 12.) You treat the controller like any I/O device.

To send a request, you program your computer to output the appropriate character string to the controller.

To get a response, you program your computer to input the expected character string from the controller.

The following programming statements show how you would output a request message and read the resulting response. This example is written in Fortran and uses the following assignments:

• I/O Channel 5 for your computer's RS422/485 Transmit Data Line.

• I/O Channel 6 for your computer's RS422/485 Receive Data Line.

• I/O Channel 7 for your computer's printer or terminal.

Table 3-3 lists the programming statements for this example.

Table 3-3 Programming Statements

Step Statement Action

Sending the Request

Getting the Response

Displaying the Response

10 Write (5,20)

20 Format (“XXXXXXX”)

30 Read (6,40) Reply 40 Format (12)

50 Write (7,60) Reply 60 Format (12)

Writing the character string the character string XXXXXXX to I/O channel 5 which transmits the character string XXXXXXX to the controller.

Reading the character string at I/O Channel 6 which receives data from the controller into reply.

Writing the contents of Reply to I/O Channel 7, a printer or terminal.

5/99 RS422/485 ASCII Communications Option Product Manual 19

3.3 Message Exchange

What is a message exchange?

Your computer communicates with the UDC controllers using the RS422/485 link. Each communication takes place as a message exchange: Your computer sends a request message (ASCII characters), and then waits for the resulting response from the controller involved (ASCII characters). Figure 3-1 shows how this occurs.

Figure 3-1 Message Exchanges

Read request

Host

Response

Write request

Busy

Ready

Status of Last

Transaction

UDC

23092

Sending requests

Your computer is the host, it initiates a message exchange. The UDC controllers are respond-only devices.

When you send a Read request, the UDC responds with the data requested. If you write configuration or override data into a UDC, the UDC responds with a Busy message (0082xx). The host should send a Ready message at which time the UDC will respond with a status of the write transaction. Communication with a single UDC should not be faster than 1/3 second.

Until the UDC completes processing of the data, any subsequent valid message received is answered with a busy response.

20 RS422/485 ASCII Communications Option Product Manual 5/99

3.4 Request Messages

What is a request message?

Your computer queries a controller and indicates the communication function, or operation, that the controller should perform by sending a request message. Request messages are composed of standard fields, separated by commas. Each field contains a certain kind of information, which you must enter in order to have a valid request message.

Request message fields

Figure 3-2 shows the request message fields and the selections that may be entered into each field. Table 3-4 lists these selections and their definitions.

Figure 3-2 Request Message Fields

,,,, ,

Station Address

A two digit device

address – 01 to 99

NOTE: Two loop controllers will have an address assigned to each loop. Specify the specific address for the loop with which you want to communicate.

Comma Delimiter

required to separate fields

Protocol Field

4204 –

selects checksum protocol

0204 –

ignores checksum

UDC Status (hexadecimal)—see matrix below

– REQUEST –

Single Byte Decimal – unsigned (digital configuration list) – for

Parameter codes 128 to 255

Single Byte Decimal – unsigned (extended

list) – for Parameter codes 128 to 158 in extended configuration Oxford Floating Point (analog configuration list) – for Parameter

codes 001 to 125 Oxford Floating Point (extended

Parameter codes 001 to 021 in extended configuration ASCII Text (Loopback only)

ASCII Text (Analog configuration list for parameter

I D

I D Code #103 - Totalizer value (UDC6300, UDC 3300 only)

Data Type Field

CR LF

Checksum Field

HH=2-digit Hex representing

Data Field

READ – Item no. only WRITE – Item no., value READY – 000 LOOPBACK – ASCII text

analog configuration list) – for

calculated checksum

digital configuration

UDC State and Mode

0 = Slave, Manual 2 = Slave, Toggle between LSP/RSP* 4 = Slave, Automatic 6 = Slave, No Change E = Monitor, No Change

Change from RSP to LSP or LSP to RSP

READ only in Monitor Mode

READ and WRITE in Control Mode Used after WRITE to verify data transaction

***

Protocol Class and Operation Code

4 = Configuration, Read** 5 = Configuration, Write** 6 = Configuration, Ready*** (only E6) 8 = Loopback (only E8)

Mode

SLAVE

MAN

SLAVE

TOGGLE

SLAVE

AUTO

SLAVE

NO CHNG

MON

NO CHNG

CONF

READ

00000100 00000101 00000110

04 05 06 X

00100100 00100101 00100110

24 25 26 X

01000100 01000101 01000110

44 45 46 X

01100100 01100101 01100110

64 65 66 68

11100100 11100110

CONF

WRITE

E4 X E6 E8

CONF

READY

LOOP BACK

23083

5/99 RS422/485 ASCII Communications Option Product Manual 21

3.4 Request Messages, Continued

Request message field selections

Table 3-4 is a list of selections for the request message fields and their definitions.

Table 3-4 Request Message Fields Definitions

Selection Definition

Station Address A two digit device address – from 01 to 99 – that

identifies the specific controller you are addressing. You must assign a unique station address to each controller on the link.

For a 2 Loop controller, two distinct addresses must be configured. One address is used to designate Loop 1; and one is used to designate Loop 2. Either address may be used for transactions which are loop independent.

See "Preparing the Controller for Communications" in this manual. A UDC will not respond to address 0 since the address results in a disconnect.

Protocol Field A four digit number that selects whether or not you are

going to use a Checksum Protocol (for increased data security) with your message exchange.

• 4204 selects Checksum Protocol – see “Checksum Protocol”

UDC State and Mode

Protocol Class and Operation Code

• 0204 ignores Checksum Protocol

Any sequence utilizing other than 4 or 0 in the first digit results in an error with an error message returned.

A hexadecimal number that determines what state you want the UDC to be in (monitor or slave) and the mode of operation desired (manual or automatic). You can also change the controller setpoint from Local setpoint to Remote setpoint or vice-versa.

ATTENTION

mode will not be indicated in the response until the next transaction.

A hexadecimal number that allows you to do a Loopback or do a READ, WRITE, or READY transaction.

Any change made in UDC State or Control

22 RS422/485 ASCII Communications Option Product Manual 5/99

3.4 Request Messages, Continued

Request message field selections, continued

Table 3-4 Request Message Fields Definitions, Continued

Selection Definition

Data Type Field A two digit number that specifies the format, or data type,

of each of the parameters that can be accessed in the UDC controller.

11 = Single Byte Decimal (unsigned) – used with

configuration protocol for digital parameter code numbers 128 through 255.

41 = Single Byte Decimal (unsigned) – used with

configuration protocol of extended digital parameter code numbers.

18 = Floating Point Format – used with configuration

protocol for analog parameters code numbers 001 through 125.

48 = Floating Point Format – used with configuration

protocol for extended analog parameter code

numbers. DD = ASCII Text – Used with loopback protocol only. I D = ASCII Text – Used with configuration protocol for

Analog Parameters ID Code #103 |

(UDC 6300, UDC 3300 only)

Data Field The data in this field is determined by the type of request:

• READ – three digit parameter code which identifies a

particular parameter for which you want to know the value or selection.

• WRITE – three digit parameter code, which identifies a

particular parameter you want to change, a comma (,), and the value or selection you want to enter.

• READY – three zero's (000) – used in conjunction with

a write request. Sent after a write request to verify that the information transmitted was received.

• LOOPBACK – ASCII Text

Checksum Field (Optional)

Carriage Return/Line Feed

This field is a one byte hexadecimal value (two ASCII characters) representing the binary sum, ignoring carries, generated by adding the ASCII code for each character in the message exchange, up to but not including the checksum and the CR and LF characters.

• No Characters = No Checksum

• HH = two digit hexadecimal number representing the

calculated checksum

Terminates a message. The message will not be exchanged unless used in this order (CR LF).

5/99 RS422/485 ASCII Communications Option Product Manual 23

3.5 Response Messages

What is a response message?

The response message tells your computer the present status of the operation initiated by the request message. Response messages are composed of standard fields, separated by commas.

Response message fields

Each field contains a certain kind of information. Figure 3-3 indicates the response message fields and lists the information that could be returned in each field.

Figure 3-3 Response Message Fields Information

– RESPONSE –

Request Message Status Code

00 =

Request message received successfully

01 =

Data Type Code invalid

02 =

Request is invalid

04 =

Checksum protocol indicates a problem or a parity error

UDC Status Code

UDC functioning properly and has performed the

00 =

operation UDC received invalid data and aborted the operation

01 =

UDC is busy (Ret'd on WRITES)*

02 =

UDC cannot perform requested operation in current

04 =

mode UDC performing Autotune or Accutune

06 =

UDC unable to perform request at present time (may

07 =

occur during writes to EEProm or when unit is in set up) UDC error status has changed (device dependent status)

80 =

Added to above i.e. –82

UDC State and Mode (Hexadecimal No.)

0 = Slave, Manual LSP 2 = Slave, Manual RSP 4 = Slave, Automatic LSP 6 = Slave, Auto RSP

* **To verify what you have sent, send a READY request (see READ/WRITE operations.

Change of state = Alarm went ON or OFF since last communication.

8 = Monitor, Manual LSP A = Monitor, Manual RSP C = Monitor, Automatic LSP E = Monitor, Automatic RSP

item #, value

Checksum

returned for 4204

–

requests not returned for 0204

Data Field

always item no., value (integer or floating point)

Alarm Status (Hexadecimal No.)

No Alarm

Alarm #1 On

Alarm #1 Change of state** (Note 1)

Alarm #1 On, Alarm #1 Change of state

Alarm #2 On

Alarm #1 On, Alarm #2 On

Alarm #1 Change of state, Alarm #2 On

Alarm #1 & #2 On, Alarm #1 Change of state

Alarm #2 Change of state (Note 1)

Alarm #2 Change of state, Alarm #1 On

Alarm #1 & #2 Change of state (Note 1)

Alarm #1 & #2 Change of state, Alarm #1 On

Alarm #2 Change of state, Alarm #2 On

Alarm #1 & #2 On, Alarm #2 Change of state

Alarm #2 On, Alarm #1 & #2 Change of state

Alarm #1 & #2 On, Alarm #1 & #2 Changed

Note 1. On the UDC6300, If alarm 3 and 4 are enabled, then: 2 = Alarm 3 ON 8 = Alarm 4 ON A = Alarm 3 and 4 ON

–

requests

23084

24 RS422/485 ASCII Communications Option Product Manual 5/99

3.5 Response Messages, Continued

Response message field Information

Table 3-5 is a list of the information contained in the response message and their definitions.

Table 3-5 Response Message Fields Definitions

Type of

Information

Request Message Status Code

UDC Status Code A two digit code that indicates whether or not the UDC

UDC State and Mode

A two digit code that indicates whether or not the present request message was successfully processed. For detailed explanations and recovery procedures for these

codes, refer to ‘Request Message Status Codes” in this section.

controller addressed is working correctly and has performed the requested operation. For detailed explanations and recovery procedures for these codes, refer to “UDC Status Codes” in this sections.

A hexadecimal number that indicates whether the UDC controller's present state is "Slave" or "Monitor" and whether it is in Manual or Automatic mode using the Local setpoint or Remote setpoint.

ATTENTION

mode will not be indicated in the response until the next transaction.

Any change made in UDC State or Control

Definition

Alarm Status A hexadecimal number that indicates the status of Alarm

#1 and #2 or both. It indicates when the Alarm is on or has changed state since last communication. The change of state indicator is a backup to the on/off state indicator. If an alarm goes from off to on then off in between consecutive communications, the on/off would not show it. The change of state flag would show that it had happened.

Data Field This field always returns the identifying number for the

parameter in the request message and the value for that parameter (either an integer or field floating decimal point).

Optional Checksum Field

This field is a one byte hexadecimal value (two ASCII characters) representing the binary sum, ignoring carries, generated by adding the ASCII code for each character of the response message, ignoring parity, up to but not including the checksum. It is returned for 4204 requests only. See “Checksum Protocol” in this section.

5/99 RS422/485 ASCII Communications Option Product Manual 25

3.6 Status Codes

Request message status codes

The codes, listed in Table 3-6, indicate whether or not the request message was successfully processed. A suggested recovery procedure is listed for those that indicate an error.

Table 3-6 Request Message Status Codes

Request

Message

Status Code

00 The request message was

successfully processed.

01 Request message format

invalid.

02 Request is invalid. The

controller addressed does not support the requested operation.

04 Checksum indicated in the

request message differs from the checksum the UDC calculated. Or UDC has detected incorrect parity for character transmitted in request.

Explanation Suggested Recovery

Not applicable.

Check format of request message. Re-send message.

Check parameter identifying code and value.

Check checksum calculations. Re-send message.

26 RS422/485 ASCII Communications Option Product Manual 5/99

3.6 Status Codes, Continued

UDC status codes

All the controllers on the link return the UDC Status Codes listed in Table 3-7. A suggested recovery procedure is listed for those that indicate an error.

Table 3-7 UDC Status Codes

UDC

Status

Code

00 UDC functioning properly and

has received the message correctly.

01 UDC has received invalid data

from the computer and did not perform the requested operation.

02 UDC is busy until the data

received is processed.

04 UDC cannot perform the

requested operation in its current mode.

Explanation Example Suggested Recovery

Data error: Configuration item number incorrect, data out-ofrange or incorrect.

Returned after each write when a controller is processing a change to configuration database.

1. Request error, request illegal, request incorrect in present state (Calib).

2. Requested illegal mode change.

3. Data received in wrong format.

Not applicable.

Check the UDC’s configuration

and limits.

1. Do ready request to see if information received.

2. Wait, then re-send request.

Check configuration with last request. Check data field and data type field.

06 The UDC is performing

Autotune or Adaptive Tune.

07 UDC unable to perform

request at present time.

+80 UDC status change Indicates one or more of the

*Emergency manual, Failsafe, Working calibration checksum error, Configuration checksum error, Factory calibration error, Hardware failure, Restart after shed, Configuration/calibration memory changed.

Returned when the controller is performing the Autotune or Adaptive Tune function.

May occur during writes to EEPROM or when unit is in set up and data changing via the keyboard.

following have changed.*

Wait or stop Autotune/ Adaptive Tune, then re-send message.

Wait, re-send request.

Read 255 code. Clear by writing to 255 code.

5/99 RS422/485 ASCII Communications Option Product Manual 27

3.7 Checksum Protocol (for Data Security)

Introduction

CAUTION

Using checksum protocol

The optional Checksum Protocol is used to increase security on the RS422/485 link. This protocol enables both your computer and your UDC to detect messages that the RS422/485 link has transmitted inaccurately. Thus, this protocol makes the RS422/485 communications link more reliable.

Failure to use checksum protocol could make the undetected error rate for the RS422/485 link unacceptable for your process control application.

You can use the checksum protocol with any message exchange. The UDC uses the protocol to check the transmission of request messages. Your computer uses the protocol to check the transmission of response messages.

When a message exchange includes checksum protocol:

• Your UDC can tell, with high probability, if the ASCII code in the request message has changed during transmission from your computer.

• Your computer can tell, with high probability, if the ASCII code in the response message has changed during transmission from the UDC.

To use Checksum Protocol, you change the format of the request message as shown in Figure 3-4 as follows:

• You use a 4204 in the request format.

• You insert a 2-digit Hexadecimal number that represents the checksum that you have calculated from the ASCII codes in the request message as explained in “Calculating the Checksum”. See Section 12 for an ASCII Conversion table and a Hexadecimal Binary table.

Figure 3-4 Request Format for Checksum Protocol

ASCII code for these characters is added

to calculate the checksum

Address Protocol Field UDC Status Data Type Field Operation Dependent Data CHECKSUM Carriage Return Line Feed

CR LF42 04

23085

28 RS422/485 ASCII Communications Option Product Manual 5/99

3.7 Checksum Protocol (for Data Security), Continued

Calculating the Checksum

Table 3-8 lists the procedure for calculating the checksum. See Figure 3-5 for an example.

Table 3-8 Calculating the Checksum Procedure

Step Action

1 Take the binary sum, ignoring carries generated by the most

significant bits, of the ASCII code for each of the message’s characters, ignoring parity, up to but not including the CHECKSUM field and the CR and LF characters. The final sum should be an 8-bit binary number. See Section 12 for ASCII Conversion table and Hexadecimal to Binary table.

2 Convert the four least significant bits of this sum to the equivalent

hexadecimal digit. This becomes the least significant digit in the CHECKSUM field.

3 Convert the four most significant bits of this sum to the equivalent

hexadecimal digit. This becomes the most significant digit in the checksum field.

5/99 RS422/485 ASCII Communications Option Product Manual 29

3.7 Checksum Protocol (for Data Security), Continued

Checksum calculation example

Figure 3-5 shows an example of the result of a checksum calculation according to instructions in Table 3-8.

Figure 3-5 Example of Checksum Calculation

Example

03,4204,E4,18,001,7C CR LF

0 3

0011 0011 0110 0010 1000 0011 1100 0011 1111 0011 0010 0011 0101 0010 1000 0100 1100 0011 1111 0010 0010 0011 0101 0010 1001 0010 1011 0011 1110 0011 0001 0011 0101 0010 0111

0000 0011 0011 1100 1111 0100 0011 0010 0101 0000 0101 0100 1001 1100 0101 0101 1010 0100 1110 1100 1010 0001 1011 1000 0011 1100 1111 0000 1111 0000 1111 0001 0000 1100 1100

Hex ➔

30 RS422/485 ASCII Communications Option Product Manual 5/99

C (Checksum)

23086

3.7 Checksum Protocol (for Data Security), Continued

Success or failure

After receiving a request that uses checksum protocol, the UDC calculates the checksum of the characters received and compares this to the hexadecimal number stated in the checksum field. Depending on whether

the checksums agree, the UDC returns either the “success” or “failure” response. Figure 3-6 indicates what happens when checksum protocol is used.

Figure 3-6 Using Checksum Protocol

Request that includes

Host UDC

Checksum protocol

"Failure" response

"Success" response

Computer uses protocol to check response messages

Controller uses

23087

protocol to check request messages

5/99 RS422/485 ASCII Communications Option Product Manual 31

3.7 Checksum Protocol (for Data Security), Continued

Success response

If the checksums agree – and no other problems are encountered – the UDC returns the success response beginning with Request Message Status Code 00. Figure 3-7 indicates this response.

Figure 3-7 “Success Response” Message Fields

"success" response

0 0 CR LF

Request Message Status Code UDC Status Code UDC State and Mode Alarm Status Operation Dependent Data CHECKSUM Carriage Return Line Feed

23088

32 RS422/485 ASCII Communications Option Product Manual 5/99

3.7 Checksum Protocol (for Data Security), Continued

Failure response

If the checksums disagree, UDC ignores the request and returns the failure response Request Message Status Code 04. To recover, your computer repeats the operation. Figure 3-8 indicates this response.

Figure 3-8 “Failure Response” Message Fields

"failure" response

Request Message Status Code (checksum protocol indicates a problem or parity error)

The failure response may also show that there is a problem with the UDC. In this case, the response would be:

Request message status code (CHECKSUM O.K.) UDC Status Code (01 through 07 indicating an error) UDC State and Mode Alarm Status Checksum (for the 4 previous characters)

00 CR LF

CR LF

23089

Checksum Calculation

ATTENTION

After receiving a response that has checksum protocol, your computer should perform the checksum calculations on the characters received, and compare the results to the checksum in the response message. If the checksums disagree, your computer should repeat the operation.

If there is a problem with the UDC itself, a UDC Status Code indicating an error will be returned.

5/99 RS422/485 ASCII Communications Option Product Manual 33

3.8 Shed

What is Shed?

Shed time

Shed controller mode and output level

Shed setpoint recall

Shed happens when the controller, which has been working in "Slave," reverts to "Stand Alone" mode. Upon receiving a "Slave" message, the controller resets the "SHED TIMER." If this timer expires before the next valid message, the controller goes to stand alone operation. When the host reconnects with a valid message, the response will indicate as 8 at the third digit to indicate a restart after shed.

Thus SHED acts as a safeguard in case the computer or communications link fail. If something prevents the computer from communicating with the controller the device returns to the local control mode. The local operator is then able to regain control over the controller and operate it by the keyboard.

Shed Time works like a timer. The number selected will represent how many sample periods there will be before the controller sheds from computer control. You can configure the shed time to be one that is between 1/3 second and approximately 83 seconds. 0 = No Shed.

This determines the mode of local control whenever the controller is shed from the communication link.

This determines what setpoint will be used if the controller is shed from the communications link.

How to enter this information

Refer to “Preparing the Controller for Communications” in this section for these selections and procedure for entering the information into the controller.

34 RS422/485 ASCII Communications Option Product Manual 5/99

3.9 Loopback (UDC 2300, UDC 3000, UDC 3300 Only)

Making sure all the UDC 2300/3000/3300 controllers are on-line

Loopback message exchange

Request message

Once you have established communications between the UDC 2300/3000/3300 controller and your computer and understand the message exchange, it is a good idea to test communications to all the controllers on the RS422/485 link. The LOOPBACK operation is an easy way to do this. By including the appropriate address in the loopback operation, you can send a series of characters from your computer to any device on the link.

After receiving these characters, the device addressed "echoes" back the same characters. By comparing the characters sent to those returned, you can tell whether communications are working correctly.

With this message exchange, you can test the communication link between your computer and any controller.

• In the request message, your computer sends a series of characters to the desired device.

• In the response message, the device returns the characters it received to your computer.

Table 3-9 is an example of the Loopback Request Message with or without the checksum.

Table 3-9 Example of Loopback Request Message

Protocol Message Format

With Checksum AA,4204,E8,DD,123456789ABC,CS CR LF

(12 characters max.)

Without Checksum AA,0204,E8,DD,123456789ABCDE, CR LF

(14 characters max.)

Where:

AA = Status Address

5/99 RS422/485 ASCII Communications Option Product Manual 35

3.9 Loopback, Continued

Response message

Programming example

Table 3-10 is an example of the Loopback Response Message with or without the checksum.

Table 3-10 Example of Loopback Response Message

Protocol Message Format

With Checksum OOSSMA,123456789ABC,CS CR LF Without Checksum OOSSMA,123456789ABCDE, CR LF

Where:

OO = UDC Type Error SS = UDC Status M=Mode (Hex – see "Message Exchange")

A = Alarm Data (Hex – see "Message Exchange")

The programming statements in Table 3-11 show how you could perform the LOOPBACK operation with the UDC controller that has station

address 09– not using checksum.

If the LOOPBACK operation is successful, these statements would print OOOOMA,HELLO#09.

Where: M = Mode

A = Alarm Data

Table 3-11 Programming Example

Programming Statement Result

Request 10 Write

20 Format (

"09,0204,E8,DD,HELLO#09")

Response 30 Read (6,40) Reply

40 Format (A15) 50 Write (7,60) Reply 60 Format (A15)

(5,20)

Sending the LOOPBACK request message that contains the eight characters HELLO#09 to the controller with station address 09.

Receiving and printing the response message that contains the characters returned.

36 RS422/485 ASCII Communications Option Product Manual 5/99

3.10 Recovering from Communications Failures

What is a lost message?

What happens to a lost message

When your computer sends a request message but doesn’t receive a response, a message (either the request or the response) has been lost on the link. As shown in Figure 3-9, problems in your computer, the link, or the controller could cause a message to get lost.

Depending on how your programming handles messages, a lost message could hang up your programming forever. Suppose your programming uses a high-level language input command (in Fortran, READ) to retrieve response messages from the input device or buffer fed by the link. Upon executing this input command, your computer goes to the input device to retrieve the response message and waits there until the data arrives. If a message is lost, the message exchange is never completed. Thus, the input command is left waiting for a response message that will never arrive.

As you can see, you must design your programming to handle the possibility that the messages will get lost on the link. Make sure that your programming includes a timing routine that detects the lost message and aborts the pending input command.

Figure 3-9 Lost Messages

Computer executes routine to send request message

A problem in your computer or the RS interface stops the transmission of data on the RS links

REQUEST

A problem in the RS link stops the transmission of data

Controllers can't process the request because –

• Your computer has changed Baud rate or parity. Therefore, the controller is synchronized for data transmissions different from those your computer is now using.

• Controller is not operational.

LINK

Controller

L I N K

Controller

23090

5/99 RS422/485 ASCII Communications Option Product Manual 37

3.10 Recovering from Communications Failures, Continued

Timing message exchanges to detect lost messages

The flowchart in Figure 3-10 shows how to time a message exchange so that you can tell if a message has been lost. (This is only an example, not the suggested method.) Like all timing routines, this one includes a wait and a read interrupt (in Basic, a PEEK) rather than a standard input command.

Figure 3-10 Timing a Message Exchange and Checking for a Response

Send the request message.

Wait the appropriate amount of time

On time out, check for the response message.

If controller has not responded, If controller has responded, process response message.

retry failed request three times. If

no response, refer to Loopback

instructions.

PROGRAMMING A TIMED MESSAGE EXCHANGE

Longest Request/Response Time in mSec:

(78 × [19,200/Baud] mSec

PLUS (+)

Wait Time:

35 mSec (includes leeway)

Average Time to Execute Timer Loop:

1 millisecond

Baud Time

19,200

9600 4800 2400 1200

600 300

113 ms 191 ms 347 ms

659 ms 1283 ms 2531 ms 5027 ms

Send request.

X = X + 1

X = Time

YES

Check input device.

Response

YES

Process response

Request

3 times

YES

See Loopback instructions.

23091

38 RS422/485 ASCII Communications Option Product Manual 5/99

3.10 Recovering from Communications Failures, Continued

Wait

Read Interrupt

How long to wait

Timing routine

The WAIT is the amount of time that your computer will wait for a response before assuming that a message has been lost. If the response doesn’t appear in the allotted time, your computer should retry the request

– up to three times. If your computer still hasn't gotten a response, your programming assumes that communications on the link have failed and calls the recovery or alarm routine.

The READ interrupt merely checks that input device or buffer for data, instead of waiting indefinitely until data arrives.

Before you can program a timing routine, you must determine how long to wait for a response. This wait must be at least as long as the response time for the longest message exchange when executed at your computer's baud rate. Also note that after the UDC has completed sending a response to your computer, it will require up to 1/3 second of additional processing time before it is ready to accept any new request message. If your computer sends a request to the UDC while it is still busy processing the previous request, it will respond with a BUSY status. Your computer can handle this situation by re-trying the request.

Once you have established the appropriate wait time, you can program the timing routine. To do so, you loop an instruction until the desired wait time has elapsed, as shown in the figure on the previous page.

This timing routine is the simplest one you could program. But, it is not efficient – your program waits the same amount of time for the shortest message as the longest. You devise a more efficient routine, such as a loop that checks for the response message each time "X" increments.

5/99 RS422/485 ASCII Communications Option Product Manual 39

40 RS422/485 ASCII Communications Option Product Manual 5/99

Section 4 – Read and Write Operations

4.1 Read Operations

Introduction

Transaction states

Analog or digital

The Read operations (Data Retrieval) allow your computer to read data from any controller on the RS422/485 link. Data retrieval for each operation is accomplished through a message exchange between your computer and the device you are addressing.

You can request the data for only one identifying code at a time, but, the response may be a single variable or a three variable type depending on the code used.

Read transactions can be performed in either UDC state: Monitor or Slave.

ATTENTION

Any change made in UDC state or control mode will not be

indicated in the response until the next transaction.

The parameters being read will be either Analog (codes 1 through 125) or Digital (Codes 128 through 255) value or selections so that all Read message formats must adhere to the standardization rules shown in the tables that follow.

5/99 RS422/485 ASCII Communications Option Product Manual 41

4.2 Read Analog Parameters

Introduction

Request format

The Analog identifying Codes are codes 001 through 125. Each of these codes are read using the Request and Response formats shown in tables 4-1 and 4-2.

Table 4-1 lists the request format with or without checksum, for Analog I.D. Codes 001 through 125.

Where:

AA = Station Address (Each loop of a 2-loop controller has a

unique address – see "Message Exchange") X = UDC State and Mode (Hex – see "Message Exchange") NNN = Identifying Code for Analog Parameter (001 to 125) CS = Checksum Value (2 digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-1 Analog Parameter Request Format

Format Type Format

With Checksum AA, 4204, X4, 18*, NNN, 0, CS CR LF Without Checksum AA, 0204, X4, 18*, NNN, 0, CR LF

*Use 48 for extended anal og configuration I.D. codes (001 to 043), UDC 3300, UDC 6000, UDC 6300 only.

42 RS422/485 ASCII Communications Option Product Manual 5/99

4.2 Read Analog Parameters, Continued

Response format

Table 4-2 lists the response format, single or three variable with or without checksum, for Analog I.D. Codes 1 through 125.

Where:

OO = UDC Type Error (00 = No Error) SS = UDC Status M=Mode (Hex – see "Message Exchange")

A = Alarm Data (Hex – see "Message Exchange") NNN = Identifying Code for Analog Parameter DDD.D = Floating Point Value CS = Checksum (two digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-2 Analog Parameter Response Format

Variable Format Type Format

Single with checksum OOSSMA, NNN, DDD.D, CS, CR LF

(see note 1)

without checksum OOSSMA, NNN, DDD.D, CR LF

(see note 1)

Three with checksum OOSSMA, NNN, DDD.D, DDDD, DDD.D, CS,

CR LF (see note 1)

without checksum OOSSMA, NNN, DDD.D, DDD.D, DDDD.,CR

LF (see note 1)

Note 1.Floating point values may look like this:

DDDD. DDD.D DD.DD D.DDD

-DDD.D -DDD. -DD.DD -D.DDD

They must have four characters and one decimal point as shown, negative sign as an extra character.

5/99 RS422/485 ASCII Communications Option Product Manual 43

4.2 Read Analog Parameters, Continued

Example

Figure 4-1 is an example of a Read Analog Parameter message exchange; specifically, Read the value of heat gain; Analog I.D. Code 001.

Figure 4-1 Read Analog Parameter Message Exchange

request

Address Protocol Field (without checksum) UDC State and Mode E = monitor, no change 4 = configuration, read Data Type Code for Analog Identifying Code for Heat Gain Place Holder for Data Values

response

No UDC Error No Change in Status Monitor No Alarm Heat Gain Identifying Code Value of Heat Gain

03 , 0204 , E4 , 18 , 001 ,

00 00 C0 , 001 , 005.0 CR LF

CR LF

23093

44 RS422/485 ASCII Communications Option Product Manual 5/99

4.3 Read Digital Parameters

Introduction

Request format

The Digital identifying codes are Codes 128 through 255. Each of these codes are read using the Request and Response formats shown in Tables 4-3 and 4-4.

Table 4-3 lists the request format, with or without checksum, for digital I.D. Codes 128 through 255.

Where:

AA = Station Address (Each loop of a 2 loop controller has a

unique address – see "Message Exchange") X = UDC State and Mode (Hex – see "Message Exchange") MMM = Identifying Code for Digital Parameter (128 to 255) CS = Checksum Value (two digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-3 Digital Parameter Request Format

Format Type Format

With Checksum AA, 4204, X4, 11*, MMM, 0, CS, CR LF Without Checksum AA, 0204, X4, 11*, MMM, 0, CR LF

*Use 41 for extended digital configuration I.D. codes (128 to 158), UDC 3300, UDC 6000, UDC 6300 only.

5/99 RS422/485 ASCII Communications Option Product Manual 45

4.3 Read Digital Parameters, Continued

Response format

Table 4-4 lists the response format, with or without checksum, for digital I.D. codes 128 through 255.

Where:

OO = UDC Type Error (00 = No Error) SS = UDC Status M=Mode (Hex – see "Message Exchange")

A = Alarm Data (Hex – see "Message Exchange") MMM = Identifying Code for Digital Parameter DDD = Digital Value (always 3 characters) CS = Checksum (2 digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-4 Digital Parameter Response Format

Format Type Format

With Checksum OOSSMA, MMM, DDD, CS CR LF Without Checksum OOSSMA, MMM, DDD, CR LF

Example

Figure 4-2 is an example of a Read Digital Parameter message exchange; specifically, read the algorithm selection: digital I.D. Code 128 and maintain or change the UDC state to slave.

Figure 4-2 Read Digital Parameter Message Exchange

request

Address Protocol Field (without checksum) UDC State and Mode 6 = slave, no change in mode 4 = configuration, read Data Type Code for Digital Identifying Code for Algorithm Selection Placeholder for Data Value

response

No UDC Error No Change in Status Monitor No Alarm Algorithm Selection Identifying Code PID-B

NOTE: Change to slave will not be noted until the next message exchange.

03 , 0204 , 64 , 11 , 128 , CR LF

00 80 C0 , 128 , 002 CR LF

23094

46 RS422/485 ASCII Communications Option Product Manual 5/99

4.4 Write Operations

Introduction

Transaction state

Write message exchange

The Write operations allow your computer to write data type transactions such as Overriding the PV, Setpoint, inputs as well as writing configuration data such as Tuning Parameters, Algorithm Selection, Setpoint Ramp Information, etc. to the controller.

Write transactions can only be performed in the Slave Mode.

In a Write transaction, only single items are permitted to be written.

A Ready transaction is required to determine if the information was received.

Following any Write, a Busy indication is returned.

Table 4-5 lists the steps for the Write message exchange.

Table 4-5 Write Message Exchange Steps

Step Action

1 Do a Write request to change a parameter (see Table 4- 6). 2 Receive a Busy response (see Table 4-7).

CAUTION

ATTENTION

3 Send Ready request to see if the information has been processed

(see Table 4-8 ).

4 Receive an “Is Ready” response (see Table 4-9 ). 5 Do a Read request to check the value (OPTIONAL).

The data stored in non-volatile memory is expected to be retained for 10 years. However, additional writes will degrade the retentivity of the non-volatile memory.

Any change made in UDC State or Control Mode will not be indicated in the response until the next transaction.

5/99 RS422/485 ASCII Communications Option Product Manual 47

4.5 Write Analog Parameters

Introduction

Request format

The analog identifying codes are codes 001 through 125. The Write request and response formats are shown in Tables 4-6, 4-7, 4-8, and 4-9.

Table 4-6 lists the write request format with or without checksum for Analog I.D. Codes 1 through 125.

Where:

AA = Station Address (Each loop of a 2 loop controller has a

unique address – see "Message Exchange") X = UDC State and Mode (Hex – see "Message Exchange") NNN = Identifying Code for Analog Parameter (001 to 125) DDD.D = Floating Point Value (see note 1) CS = Checksum Value (two digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-6 Write Request Format for Analog I.D. Codes

Format Type Format

With Checksum AA, 4204, X5, 18*, NNN, DDD.D, CS CR LF (see note 1) Without Checksum AA 0204, X5, 18*, NNN, DDD.D, CR LF (see note 1)

*Use 48 for extended anal og I.D. codes 001 through 043, UDC 3300, UDC 6000, or UDC 6300 only.

Note 1 Floating point values may look like this:

DDDD. DDD.D DD.DD D.DDD

-DDD.D -DDD. -DD.DD -D.DDD

They must have four characters and one decimal point as shown, negative sign as an extra characters.

48 RS422/485 ASCII Communications Option Product Manual 5/99

4.5 Write Analog Parameters, Continued

“Busy” response

“Ready” request

If the controller did not process the information, the controller will return a four digit status code indicating an error in the third and fourth digit. See

“Status Codes.”

Table 4-7 lists the busy response that can be received, with or without checksum, after a Write request that indicates a good write:

Where:

M = Mode (Hex - see “Message Exchange”) A = Alarm Data (Hex – see "Message Exchange") CS = Checksum (two digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-7 “Busy” Response

Format Type Format

With Checksum 0002MA, CS, CR LF Without Checksum 0002MA, CR LF

After receiving a “Busy” response, enter a “Ready” request. Table 4-8 lists the “Ready” request format, with or without checksum.

Table 4-8 Ready Requests

Format Type Format

With Checksum 03, 4204, 66, 11, 0, CS CR LF Without Checksum 03, 0204, 66, 11, 0, CR LF

5/99 RS422/485 ASCII Communications Option Product Manual 49

4.5 Write Analog Parameters, Continued

“Is Ready” response

Check write transaction

This is the response to a Ready request. Table 4-9 lists the “Is Ready” response formats, with or without checksum.

Where:

SS = UDC Status M = Mode (Hex - see “Message Exchange”) A = Alarm Data (Hex – see "Message Exchange") CS = Checksum (two digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-9 “Is Ready” Response

Format Type Format

With Checksum 00SSMA, CS, CR LF Without Checksum 00SSMA, CR LF

To check the value a change do a “Read” for the particular parameter (I.D. Code) you have changed.

50 RS422/485 ASCII Communications Option Product Manual 5/99

4.5 Write Analog Parameters, Continued

Example

Figure 4-3 is an example of a Write of an analog parameters message exchange; specifically to change the gain value from 5 to 10; analog I.D. Code 001.

Figure 4-3 Write Analog Parameter Message Exchange Example

request

Address Protocol Format (without checksum) UDC State and Mode 6 = slave, no change 5 = configuration, write Data Type Code for Analog Identifying Code for Gain Gain Value of 10

busy response

ready request

03,0204,66,11, 0 CR LF

03 , 0204 , 65 , 18 , 010.0 , CR LF

8200

001 ,

is ready response

Request message received successfully UDC functioning properly and performed operation Control state, Automatic LSP Mode No Alarm

(OPTIONAL) Do a READ operation for Code 001 to verify change to 10.

CR LF00 80 4 0

23095

5/99 RS422/485 ASCII Communications Option Product Manual 51

4.6 Write Digital Parameters

Introduction

Request format

The digital identifying codes are Codes 128 through 225. The Write request and response formats are shown in Tables 4-10, 4-11, 4-12, and 4-

13.

Table 4-10 lists the Write request format, with or without checksum, for digital I.D. Codes 128 through 255.

Where:

AA = Station Address (Each loop of a 2 loop controller has a

unique address – see "Message Exchange") X = UDC State and Mode (Hex – see "Message Exchange") MMM = Identifying Code for Digital Parameter (128 to 255) DDD = Digital Value (always three characters) CS = Checksum Value (two digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-10 Write Request Format for Digital I.D. Codes

Format Type Format

With Checksum AA, 4204, X5, 11*, MMM, DDD, CS CR LF

“Busy” response

Without Checksum AA, 0204, X5, 11*, MMM, DDD, CR LF

*Use 41 for extended digital I.D. codes 128 through 159, UDC 3300, UDC 6000, or U DC 6300 only.

If the controller did not process the information, the controller will return a four digit status code, indicating an error in the third and fourth digit.

See “Status Codes.”

Table 4-11 lists the busy responses that can be received with or without checksum, after a write request that indicates a good write:

Where:

M = Mode (Hex - see “Message Exchange”) A = Alarm Data (Hex – see "Message Exchange") CS = Checksum Value (2 digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

52 RS422/485 ASCII Communications Option Product Manual 5/99

4.6 Write Digital Parameters, Continued

“Busy” response, continued

Table 4-11 Busy Response

Format Type Format

With Checksum OOO2MA, CS, CR LF Without Checksum OOO2MA, CR LF

“Ready” request

“Is Ready” response

After receiving a “Busy” response, enter a “Ready” request. Table 4-12 lists the “Ready” request format, with or without checksum.

Table 4-12 Ready Request

Format Type Format

With Checksum 03, 4204, 66, 11, 0 CS CR LF Without Checksum 03, 0204, 66, 11, 0 CR LF

This is the response to the Ready request. Table 4-13 lists the “Is Ready” response formats, with or without checksum.

Where:

SS = UDC Status M = Mode (Hex - see “Message Exchange”) A = Alarm Data (Hex – see "Message Exchange") CS = Checksum Value (two digit hex – see "Checksum") CR = Carriage Return LF = Line Feed

Table 4-13 “Is Ready” Response

Format Type Format

With Checksum 00SSMA, CS, CR LF Without Checksum 00SSMA, CR LF

Check write transaction

5/99 RS422/485 ASCII Communications Option Product Manual 53

To check the value of a change, do a “Read” for the particular (I.D. Code) you have changed.

4.6 Write Digital Parameters, Continued

Example

Figure 4-4 is an example of a Write of a digital parameter message exchange; specifically, to change the setpoint ramp time to 60 minutes (Code 174).

Figure 4-4 Write Digital Parameter Message Exchange Example

request

Address Protocol Format (without checksum) UDC State and Mode 6 = slave, no change 5 = configuration, write Data Type Code for Digital Identifying Code for SP Ramp Time SP Ramp Time in Minutes

busy response

03 , 0204 , 65 , 11 , 060 , CR LF

8200

174 ,

ready request

03,0204,66,11,000,0 CR LF

is ready response

Request message received successfully UDC functioning properly and performed operation Control state, Automatic LSP Mode No Alarm

(OPTIONAL) Do a READ operation for Code 174 to verify change.

CR LF00 00 4 0

23096

54 RS422/485 ASCII Communications Option Product Manual 5/99

Section 5 – Read, Write and Override Parameters

on UDC 3000 Versa-Pro Controllers

5.1 Overview

Introduction

What’s in this section

This section contains information concerning reading, writing, and overriding parameters on the UDC 3000 Controllers. There are two types of parameters:

• Data Transfer—these parameters include reading control data, option status, and reading or changing setpoints or outputs.

• Configuration Data—all the configuration data is listed in the order in which it appears in the controller.

Each type of parameter has the identifying codes listed with it. Follow the message exchange rules listed in “Read and Write Operations.”

This section contains the following topics:

Topic See Page

5.1 Overview 55

5.2 Reading Control Data 57

5.3 Option Status 58

5.4 Miscellaneous Read Only’s 59

5.5 Setpoints 61

5.6 Using a Computer Setpoint 62

5.7 Overriding Input 1 63

5.8 Canceling the Override 64

5.9 Reading or Changing the Output 65

5.10 Local Setpoint/PID Set Selection and Setpoint Ramp Status

5/99 RS422/485 ASCII Communications Option Product Manual 55

5.1 Overview - UDC 3000, Continued

What’s in this section, continued

Topic See Page

General information

5.11 Configuration Parameters TUNING SP RAMP/SP PROG ADAPTIVE TUNE ALGORITHMS INPUT 1 INPUT 2 CONTROL OPTIONS COMRS422 ALARMS

Analog Parameters

• Whenever analog parameters 001 through 107 (those that can be changed via Communications) are changed, a write cycle occurs immediately after receipt of the message.

Override Parameters

• Override analog parameters 123, 124, and 125 (computer setpoint, output, and input) are not stored in non-volatile memory and can be changed as frequently as desired with no effect on non-volatile memory retentivity, but the controller must remain in slave mode.

68 69 71 74 75 76 78 79 81 82 83

Digital Parameters

• Whenever digital configuration parameters 128 through 250 are updated via communications, the non-volatile memory is updated as soon as the message is received.

56 RS422/485 ASCII Communications Option Product Manual 5/99

5.2 Reading Control Data - UDC 3000

Overview

I.D. codes

You can Read the following control data from the UDC 3000 controller.

• Input 1

• Input 2

• PV

• Internal RV

• PV, Setpoint, Output

Use the identifying codes listed in Table 5-1 to read the specific items. A Write request for these codes will result in an Error message.

Table 5-1 Control Data Parameters

Parameter

Description

Input #1 118 18 In Engineering Units or

Input #2 119 18 In Engineering Units or

PV 120 18 In Engineering Units or

Identifying

Code

Format

Code

Range or Selection

Percentage

Internal RV 121 18 In Engineering Units or

Percentage

PV, Setpoint, and Output*

*This READ request will give a three var iable response (see READ/WRITE operation).

122 18 In Engineering Units or

Percentage

5/99 RS422/485 ASCII Communications Option Product Manual 57

5.3 Read Option Status - UDC 3000

Read

Doing a Read of I.D. Code 185 listed in Table 5-2 will tell you which of the available options are enabled/installed or disabled/not installed.

Table 5-2 Option Status

Parameter

Description

Option Status (read only)

The data field in the response message will be a decimal number from 0 to 255. Convert the decimal number to binary as shown in Figure 5-1 to determine which options are or are not active.

Figure 5-1 Option Status Information

0 to 255 Convert decimal to binary

Identifying

Code

Format

Code

Range or Selection

185 11 See Figure 5-1

Input 2

Digital Inputs

Input 2

Adaptive Tune

Set Point Programming

Not Applicable

Not Applicable Not Applicable

0 = disabled 1 = enabled

0 = not installed 1 = installed

EXAMPLE:

Binary

023

Input 2 – enabled Digital Inputs - installed Input 2 – installed Set Pont Programming - Installed

0101

23097

58 RS422/485 ASCII Communications Option Product Manual 5/99

5.4 Miscellaneous Read Only’s - UDC 3000

I.D. codes for read

only’s

The identifying codes listed in Table 5-3 represent some parameters that are Read only. No Writes allowed.

Table 5-3 Miscellaneous Read Only’s

Parameter

Description

Output Current Calibration 0%

Output Current Calibration 100%

Software Type 157 11 READ only

Software Version 167 11 0 to 225

Identifying

Code

33 18 READ only

34 18 READ only

Format

Code

Range or Selection

31 = Basic UDC 3000 32 = Field upgrade for Adaptive

Tune

33 = Field upgrade for Adaptive

Tune + Setpoint Programming

37 = Limit Controller

UDC Error Status 255 11 See below READ/WRITE*

001 = Emergency Manual 002 = Failsafe 004 = Working Calibration

Checksum Error

008 = Configuration Checksum

Error 016 = Parameter Limit Indicator 032 = Hardware Failure 064 = Restart after Shed 128 = Configuration/Calibration

Memory Changed

*Write to clear.

FOR EXAMPLE: If Read returns 192 (restart after shed-064 plus configuration change -128)

Write 192 to 255 Read returns 000 (clear)

5/99 RS422/485 ASCII Communications Option Product Manual 59

5.4 Miscellaneous Read Only’s - UDC 3000, Continued

Error status definitions

Table 5-4 lists the UDC error status codes and their definitions.

Table 5-4 Error Status Definitions

Status

Code

001 Emergency Manual Indicates that the output of the unit which

002 Failsafe Error occurs whenever the control

004 Working Calibration

Checksum Error

008 Configuration Checksum

Error

Error Definitions

has been in slave operation, is under manual control, locally. Error remains until local control is relinquished at the controller.

reverts to failsafe operation and remains as long as the condition exists.

Indicates that an error exists in the working calibration data. Re-select the inputs to load factory calibration data or field calibrate the inputs.

Error exists in the configuration data. Verify configuration data at the keyboard. Checksum will be recomputed by stepping the controller through the status tests.

016 Parameter Limit Indicator A limit condition exists on one of the

following: PV, RV, Input 1, Input 2, Input 3, Computer Setpoint. User must determine EXACT limit condition and correct.

032 Hardware Failure Indicates either a RAM test failure or

Input 1, Input 2, Input 3 failure on two consecutive conversions.

064 Restart After Shed Error occurs whenever a shed of slave

override is performed. Error is reset following a WRITE command to I.D. Code 255 (064).

128 Configuration /Calibration

Memory Changed

Error occurs whenever shed, configuration, or calibration changed. Also occurs whenever there is a change of state in 001, 002, 004, 008, or 016. Error is reset following a WRITE command to I.D. Code 255.

60 RS422/485 ASCII Communications Option Product Manual 5/99

5.5 Setpoints - UDC 3000

Overview

I.D. codes

You can use two separate setpoints in the UDC 3000 Controller. The identifying codes listed in Table 5-5 allow you to select which setpoint you want to use and to enter a value in Engineering Units or Percent (whichever is selected at Code 161) for that setpoint via communications.

Make your selection using I.D. Code 173 and enter the value for the setpoint chosen using I.D. Code 39 (SP 1) or 53 (SP 2).

Table 5-5 Setpoint Code Selections

Parameter

Description

Local Setpoint #1 39 18 Value within the setpoint

Local Setpoint #2 53 18 Value within the setpoint

Local Setpoint Select

Identifying

Code

173 11 000 = Local Set

Format

Code

Range or Selection

range limits

Point #1 only

001 = 2nd Local Setpoint

via keyboard or communications*

Associated parameters

*I.D. Code 131—second input function must be set to 0 (LSP).

Refer to Table 5-6 for the codes required to display or change any of the parameters associated with setpoints.

Table 5-6 Setpoint Associated Parameters

Parameter Code

Setpoint Limits 007, 008 Computer Setpoint 125 Setpoint Program/Ramp 178

5/99 RS422/485 ASCII Communications Option Product Manual 61

5.6 Using a Computer Setpoint (Overriding Controller

Setpoint) -

Overview

I.D. codes

Shed

Override display

UDC 3000

You can use a setpoint generated from the computer to override the setpoint being used by the controller.

The value generated by the computer will have ratio and bias applied by the controller.

Use the identifying code in Table 5-7 to enter the computer setpoint.

The computer setpoint override will continue until "SHED" from communications occurs or the controller is placed into monitor mode through communications. Doing periodic "SLAVE READS" within the shed time will allow the override to continue until communication is stopped and shed time elapses.

ATTENTION

indefinitely or until the Override is canceled. (See Override selection I.D. Code 183.)

When SP is overridden, the left most digit in the upper display becomes a "C."

0 Shed (code 154) allows the Override to continue

Associated parameters

Table 5-7 Computer Setpoint Selection

Parameter

Description

Computer Setpoint 125 18 Within the Setpoint Range

Identifying

Code

Format

Code

Range or Selection

Limits in Engineering Units or Percent.

Refer to Table 5-8 for the codes required to display or change any of the parameters associated with the computer setpoint.

Table 5-8 Computer Setpoint Associated Parameters

Parameter Code

Setpoint Limits 007, 008 Local Setpoint #1 039 Local Setpoint #2 053 Local Setpoint Selection 173

62 RS422/485 ASCII Communications Option Product Manual 5/99

5.7 Overriding Input 1 - UDC 3000

Overview

Override display

Shed

You can override the Input 1 value in the controller using I.D. Code 124 as shown in Table 5-9.

When you override the PV, the first digit in the upper display becomes a “C.”

Table 5-9 Input 1 Override Code

Parameter

Description

Override Input 1 124 18 Within the input 1 limits in

Identifying

Code

Format

Code

Range or Selection

Engineering Units or Percent (whichever is selected at I.D. Code

161).

The Override to Input 1 will continue until “SHED” from communications occurs or the controller is placed into monitor via communications. Doing Reads within the shed time will allow the override to continue until Reads are stopped and shed time elapses (I.D. Code 154).

ATTENTION

0 Shed allows override to continue indefinitely or until

override is canceled. (See Override Selection, I.D. Code 183.)

Associated parameters

Refer to Table 5-10 for the codes required to display or change any of the parameters associated with Input 1.

Table 5-10 Input Override Associated Parameters

Parameter Code

High/Low Range Values (Read Only) 029,030 Temperature Units (Read Only) 129 Input 1 Type (Read Only) 168 Transmitter Characterization

(Read Only) Input 1 Bias 107 Input 1 Filter Time Contrast 042 Burnout 164 Emissivity 023

169

5/99 RS422/485 ASCII Communications Option Product Manual 63

5.8 Canceling the Override - UDC 3000

Overview

I.D. codes

Doing a Read of I.D. Code 183 will tell you which Override is active— Input 1 (PV) or Setpoint.

Doing a Write lets you cancel either the Input 1 override set at Code 124 or setpoint override set at Code 125 or both.

Using the identifying code in Table 5-11 to Read or Write your selection.

Table 5-11 PV or Setpoint Override Cancellation

Parameter

Description

Override Selection 183 11 001 = Cancels Input 1

Identifying

Code

Format

Code

Range or Selection

(PV) Override

008 = Cancels Setpoint

Override

009 = Cancels Both

Overrides

The example below cancels both Input 1 and setpoint overrides:

XX,0204,65,11,183,009,0 CR LF

64 RS422/485 ASCII Communications Option Product Manual 5/99

5.9 Reading or Changing the Output - UDC 3000

Overview

I.D. codes

Associated parameters

You can read the output of a particular UDC 3000 controller (Read Transaction) or you can change it to suit your needs. (Do a Write Transaction.)

Use the identifying code in Table 5-12 to monitor (Read) or change (Write) the output (in manual only).

ATTENTION

To Write (change) the output, the controller must first be in

manual mode.

Table 5-12 Reading or Changing the Output

Parameter

Description

Output 123 18 -5 to +105% of full span

Identifying

Code

Format

Code

Range or Selection

(current output)

0 to 100%

(relay type output)

Refer to Table 5-13 for the codes required to display or change any of the parameters associated with the output.

Table 5-13 Associated Output Codes

Parameter Code

Output Direction 135 Output Limits 14, 15 Output Dropoff Limits 20 Failsafe Output Values 40 Output Hysteresis 19 Output Type (Read only) 160

5/99 RS422/485 ASCII Communications Option Product Manual 65

5.10 Local Setpoint/PID Set Selection/Setpoint Ramp Status

- UDC 3000

Overview

Read

Write

Identifying Code 250 lets you monitor or make selections for:

• Tuning Parameter Set #1 or #2 If Tuning Sets selection is “two keyboard” code 171 = 001

• Local Setpoint #1 or #2 If ”2 Local Setpoints” is selected 131 = 0, 173 = 1

• Run or Hold Setpoint Ramp or a Setpoint Program Data If SP Ramp or SP Program is enabled 178 = 1 Program, 178 = 2 Ramp

Table 5-14 is a table of numbers that could be returned by the UDC 3000 controller. When a Read is requested for this I.D. Code (250) you can determine which parameters are active from this table.

To Write information to the controller, select what parameters you want from Table 5-14 and enter the associated number in the data field of the Write request.

For example:

• Maintain TUNING SET #2

• Maintain LOCAL SET POINT #1

• CHANGE A SET POINT PROGRAM TO RUN

READ 250 response is 020 or 022 WRITE 250 (023), Response Busy READ 250 Response is 023

Note: some of the numbers are Read only.

Table 5-14 LSP/PID Set Selection and Setpoint Ramp Status

Parameter

Description

Enhanced Function 250 11 See Figure 5-2

Identifying

Code

Format

Code

Range or Selection

66 RS422/485 ASCII Communications Option Product Manual 5/99

5.10 Local Setpoint/PID Set Selection /Setpoint Ramp Status

- UDC 3000, Continued

Write, continued

Figure 5-2 I.D. Code 250 Indications

Tuning Set #2 Selection Local Set Point #2 Selection

Tuning Set #2 Selection Local Set Point #1 Selection

Tuning Set #1 Selection Local Set Point #2 Selection

Tuning Set #1 Selection Local Set Point #1 Selection

Set Point Ramp or Program Data Selections

None or SP Ramp, Enabled Not in Progress, (READ) 000 008 016 024 SP Ramp in Progress, Hold (READ/WRITE) 002 010 018 026

SP Ramp in Progress, Run (READ/WRITE) 003 011 019 027 SP Program, Enabled Not in Progress, (READ)

SP Program in Progress, Hold (READ/WRITE)

SP Program in Progress, Run (READ/WRITE)

004 012 020 028 006 014 022 030 007 015 023 031

23098

5/99 RS422/485 ASCII Communications Option Product Manual 67

5.11 Configuration Parameters - UDC 3000

Overview

Listed on the following pages are the identifying codes for the parameters in the various setup groups in the UDC 3000 controller. The table below lists the setup groups and the table number in which they are listed. Most of the parameters are configurable through the Host. Some are READ ONLY and are indicated as such and cannot be changed.

Setup Group Table Number

TUNING 5-15 SP RAMP/PROG 5-16 ADAPTIVE 5-17 ALGORITHMS 5-18 INPUT 1 5-19 INPUT 2 5-20 CONTROL 5-21 OPTIONS 5-22 COMMUNICATIONS 5-23 ALARMS 5-24

Reading or Writing

Do a Read or Write (see “Read/Write Operations”) depending on your requirements using the identifying code and format code listed in the tables. The range or selection available for each range is listed in the tables.

68 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Tuning

Table 5-15 lists all the I.D. Codes and ranges or selection for the function

parameters in the setup group “TUNING.”

Table 5-15 Setup Group-Tuning

Parameter

Description

Heat Gain or PB 001 18 PB=0.1 to 9999%

Heat Rate 002 18 0.08 to 10.00 Minutes Heat Reset or RPM 003 18 Reset=0.00 to 50.0 min/rpt

Manual Reset 013 18 -100 to +100% Output Cool Gain/Gain #2

or PB Cool Rate/Rate #2 005 18 0.08 to 10.00 Minutes Cool Rate/Reset #2

or RPM Heat Cycle Time 158 11 1 to 120 Seconds

Identifying

Code

004 18 PB=0.1 to 9999%

006 18 Reset=0.00 to 50.0 min/rpt

Format

Code

Range or Selection

Gain=0.1 to 9999

RPM = 0.00 to 50.0 rpt/min

Gain=0.1 to 9999

RPM = 0.00 to 50.0 rpt/min

Cool Cycle Time 159 11 1 to 120 Seconds Lockout Changes to data

always possible via communication regardless of this configuration.

132 11 0 = None

1 = Calibration 2 = +Configuration 3 = +View 4 = Maximum

(N/A for Limit)

5/99 RS422/485 ASCII Communications Option Product Manual 69

5.11 Configuration Parameters - UDC 3000, Continued

Tuning, continued

Table 5-15 Setup Group-Tuning, Continued

Parameter

Description

Keyboard Lockout 191 11 0 = All keys enabled

Identifying

Code

Format

Code

Range or Selection

1 = Manual Auto Key

Locked

2 = Setpoint Select Key

Locked

3 = Manual/Auto and

Setpoint Select Keys

Locked 4 = Run Hold Key Locked 5 = Run Hold Key and

Manual/Auto Keys

Locked 6 = Run Hold Key and

Setpoint Select Keys

Locked 7 = Run Hold, Setpoint

Select, and

Manual/Auto Keys

Locked.

70 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Setpoint Ramp/Rate/Program

Table 5-16 lists all the I.D. Codes and ranges or selections for the function

parameters in the setup group “SP RAMP/RATE/PROGRAM.”

Table 5-16 Setup Group-SP Ramp, Rate, or SP Program

Parameter

Description

Setpoint Program Ramp Selection

SP Ramp

Single SP Ramp Time

Final Ramp SP Value

SP Rate

Rate Up 108 18 0 to 9999

Identifying

Code

178 11 0 = SP Program, Rate,

174 11 0 to 255 (Minutes)

026 18 PV Range in Engineering

Format

Code

Range or Selection

and Ramp Disabled 1 = SP Program Enabled 2 = SP Ramp Enabled 3 = SP Rate Enabled

Units

Rate Down 109 18 0 to 9999

SP Program

Start Segment Number

End Segment Number (Soak)

Program Recycles 177 11 0 to 99 Guaranteed Soak

Deviation Segment #1 Ramp

Time

Segment #2 Soak Setpoint Value

Segment #2 Soak Time

Segment #3 Ramp Time

175 11 1 to 11

176 11 2, 4, 6, 8, 10, or 12

087 18 0 to 99.9 (0 = no soak)

057 18 99.59 (0-99 Hrs :

0-59 Min) or 999 (0-999 Deg/Min)

058 18 Within Setpoint Limits

059 18 99.59 (0-99 Hrs :

0-59 Min)

060 18 99.59 (0-99 Hrs :

0-59 Min) or 999 (0-999 Deg/Min)

5/99 RS422/485 ASCII Communications Option Product Manual 71

5.11 Configuration Parameters - UDC 3000, Continued

Setpoint Ramp/Rate/Program, continued

Table 5-16 Setup Group-SP Ramp, Rate, or SP Program, Continued

Parameter

Description

Segment #4 Soak Setpoint Value

Segment #4 Soak Time

Segment #5 Ramp Time

Segment #6 Soak Setpoint Value

Segment #6 Soak Time

Segment #7 Ramp Time

Segment #8 Soak Setpoint Value

Segment #8 Soak Time

Identifying

Code

061 18 Within Setpoint Limits

062 18 99.59 (0-99 Hrs :

063 18 99.59 (0-99 Hrs :

064 18 Within Setpoint Limits

065 18 99.59 (0-99 Hrs :

066 18 99.59 (0-99 Hrs :

067 18 Within Setpoint Limits

068 18 99.59 (0-99 Hrs :

Format

Code

Range or Selection

0-59 Min)

0-59 Min) or 999 (0-999 Deg/Min)

0-59 Min)

0-59 Min) or 999 (0-999 Deg/Min)

0-59 Min)

Segment #9 Ramp Time

Segment #10 Soak Setpoint Value

Segment #10 Soak Time

Segment #11 Ramp Time

Segment #12 Soak Setpoint Value

Segment #12 Soak Time

Program End State 181 11 0 = Disable SP Program

Controller Status at Program End

069 18 99.59 (0-99 Hrs :

0-59 Min) or 999 (0-999 Deg/Min)

070 18 Within Setpoint Limits

071 18 99.59 (0-99 Hrs :

0-59 Min)

072 18 99.59 (0-99 Hrs :

0-59 Min) or 999 (0-999 Deg/Min)

073 18 Within Setpoint Limits

074 18 99.59 (0-99 Hrs :

0-59 Min)

1 = Hold at Program End

180 11 0 = Last Setpoint

1 = Manual, Failsafe

72 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Setpoint Ramp/Rate/Program, continued

Table 5-16 Setup Group-SP Ramp, Rate, or SP Program, Continued

Parameter

Description

Engineering Units or Ramp Segments

Present Segment Number

Time Remaining — Minutes

Time Remaining — Hours

Cycles Remaining 254 11 (READ ONLY)

Identifying

Code

182 11 0 = HRS:MIN

251 11 (READ ONLY)

252 11 (READ ONLY)

253 11 (READ ONLY)

Format

Code

Range or Selection

1 = Degrees/Minute

Recycles—Elapsed Cycles

5/99 RS422/485 ASCII Communications Option Product Manual 73

5.11 Configuration Parameters - UDC 3000, Continued

Adaptive tune

Table 5-17 lists all the I.D. Codes and ranges or selections for the function

parameters in the setup group “ADAPTIVE TUNE.”

Table 5-17 Setup Group-Adaptive Tune

Parameter

Description

Adaptive Tune Selection

Setpoint Change 153 11 Read Only

Process Gain (KPG) 114 18 0.01 to 50.0 Adaptive Tune Error

Codes

Identifying

Code

152 11 Read only

151 11 Read Only

Format

Code

Range or Selection

0 = Disabled 3 = SP Tune 4 = Fast SP Tune

5 to 15

0 = None 1 + Output > or < Output

Limits or Manual Step = 0

2 = Output > or < Heat/

Cool Limits

4 PV Changes Insufficient 5 = Process Identification

failed

6 = Calculated Reset

Outside Reset Limits

7 = Calculated Gain

Outside Gain Limits

8 = Adaptive Tune

Aborted on Command

9 = Input #1 Error

Detected

10 = Adaptive Tune Illegal

during Ramp/SP Program

11 = Adaptive Tune

Aborted when External Switch Detected

12 = Adaptive Tune

Running

74 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Algorithm

Table 5-18 lists all the I.D. codes and ranges or selections for the function

parameters in the setup group “ALGORITHM.”

Table 5-18 Setup Group-Algorithm

Parameter

Description

Algorithm Selection 128 11 0 = ON/OFF

Output Type 160 11 READ ONLY

Identifying

Code

Format

Code

Range or Selection

1 - PID-A 2 = PID-B 3 = PD-A with Manual

Reset 4 = Three Position Step

0 = Not Allowed 1 = Position Proportional 2 = Relay Simplex 3 = Relay Duplex 4 = Current 5 = Current Duplex - Full

Range* 6 = Relay/Current Duplex

(relay on heat) 7 = Relay/Current duplex

(relay on cool)

*Current Duplex with split range not available with communications installed.

5/99 RS422/485 ASCII Communications Option Product Manual 75

5.11 Configuration Parameters - UDC 3000, Continued

Input 1

Table 5-19 lists all the I.D. Codes and ranges or selections for the function

parameters in the setup group “INPUT 1.”

Table 5-19 Setup Group-Input 1

Parameter

Description

Decimal Point Location

Temperature Units 129 11 0 = °F

Input Type 1 168 11 READ ONLY

Identifying

Code

155 11 0 = XXXX Fixed

Format

Code

Range or Selection

1 = XXX.X Floating DP

with none

2 = XX.XX Fixed

1 = °C 2 = No Units

0 =B T/C 1 = E T/C H 2 = E T/C L 3 = J T/C H 4 = J T/C L

5 = K T/C H 6 = K T/C L 7 = N T/C H 8 = N T/C L

9 = R T/C 10 = S T/C 11 = T T/C H 12 = T T/C L

13 = W T/C H 14 = W T/C L 15 = 100 PLAT. 16 = 500 PLAT

17 = 100-LO 18 = 4-20 mA* 19 = 0-10 mV* 20 = 10-50 mA*

21 = 1-5 Volts* 22 = 0-10 Volts*

23 = NIC T/C 24 = Radiamatic (RH)

* Limit Control: Non FM Only

76 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Input 1, continued

Table 5-19 Setup Group-Input 1, Continued

Parameter

Description

Transmitter Characterization

Identifying

Code

169 11

Format

Code

Range or Selection

READ ONLY 0 =B T/C

1 = E T/C H 2 = E T/C L 3 = J T/C H

4 = J T/C L 5 = K T/C H 6 = K T/C L 7 = N T/C H

8 = N T/C L 9 = R T/C 10 = S T/C 11 = T T/C H

12 = T T/C L 13 = W T/C H 14 = W T/C L 15 = 100 PLAT.

16 = 500 PLAT 17 = 100-LO 18 = LINEAR 19 = SQ ROOT

20 = NIC T/C 21 = Radiamatic (RH)

High Range Value 029 18 READ ONLY - For

TC/RTD Types ( In Engineering Units, T/CRTD)

Low Range Value 030 18 READ ONLY-For TC/RTD

Types (In Engineering Units, T/C-RTD)

Bias 107 18 -999.9 to 9999 Filter Time Constant 042 18 0 to 120 Seconds

(No Filter = 0 )

Burnout (Open Circuit Detection)

164 11 0 = None and Failsafe

1 = Upscale 2 = Downscale Limit: 0=Downscale 1=Upscale

Writes Illegal

Power Line Frequency

166 11 0 = 60 Hz

1 = 50 Hz

Emissivity 023 18 0.01 to 1.00

5/99 RS422/485 ASCII Communications Option Product Manual 77

5.11 Configuration Parameters - UDC 3000, Continued

Input 2

Table 5-20 lists all the I.D. Codes and ranges or selections for the function

parameters in the setup group “INPUT 2.”

Table 5-20 Setup Group-Input 2

Parameter

Description

Input Type 170 11 READ ONLY

Transmitter Characterization

Identifying

Code

171 11 READ ONLY

Format

Code

Range or Selection

(18 = LINEAR)

0 = B T/C 1 = E T/C H 2 = E T/C L 3 = J T/C H

4 = J T/C L 5 = K T/C H 6 = K T/C L 7 = N T/C H

8 = N T/C L 9 = R T/C 10 = S T/C 11 = T T/C H

12 = T T/C L 13 = W T/C H 14 = W T/C L 15 = 100 PLAT.

16 = 500 PLAT 17 = 100-LO 18 = LINEAR 19 = SQ ROOT

20 = NIC T/C 21 = Radiamatic (RH)

High Range Value 035 18 READ ONLY

(In Engineering Units)

Low Range Value 036 18 READ ONLY

(In Engineering Units)

Filter Time Constant 043 18 0 to 120 Seconds

(No Filter = 0)

78 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Control

Table 5-21 lists all the I.D. Codes and ranges or selections for the function

parameters in the setup group “CONTROL.”

Table 5-21 Setup Group-Control

Parameter

Description

Number of Tuning Sets

PV Switchover Value

Remote Setpoint Source

Local Setpoint Select

Identifying

Code

172 11 0 = One Set Only

056 18 Within the PV Range

131 11 0 = None

173 11 000 = Local Setpoint #1

Format

Code

Range or Selection

1 = Two Sets (keyboard or

communications 2 = Two Sets (Auto Switch

PV) 3 = Two Sets (Auto Switch

PV)

1 = Input 2

Only

001 = 2nd Local Setpoint

via keyboard or

communications* Ratio 021 18 -20.00 to +20.00 Bias 022 18 -999 to +9999 in

Engineering Units

LSP Tracking 138 11 0 = None

1 = Rsp 2 = PV

Power Up Recall 130 11 0 = Manual—LSP

1 = Automatic—LSP 2 = Automatic—RSP 3 = Last Mode, Last

Setpoint

4 = Last Mode, Last Local

Setpoint

High Setpoint Limit 007 18 Within the PV Range

(Engineering Units)

Low Setpoint Limit 008 18 Within the PV Range

(Engineering Units)

5/99 RS422/485 ASCII Communications Option Product Manual 79

5.11 Configuration Parameters - UDC 3000, Continued

Control, continued

Table 5-21 Setup Group-Control, Continued

Parameter

Description

Control Output Direction

Output Change Rate Limiting

Output Change Rate Up

Output Change Rate Down

High Output Limit 014 18 -5 to +105% of output Low Output Limit 015 18 -5 to +105% of output Output Dropoff

Limit Deadband 018 18 -5 to +25.0%

Identifying

Code

135 11 0 = Direct

189 11 0 = Disable

110 18 1 to 9999 %/MIN

111 18 1 to 9999 %/MIN

020 18 -5 to +105% of output

Format

Code

Range or Selection

1 = Direct 2 = Reverse 3 = Reverse

1 = Enable

Output Hysteresis 019 18 0 to 5.0% of PV span Failsafe Output

Value Proportional Band

Units Reset Units 149 11 0 = Minutes

*I.D. Code 131—Second Input Function must be set to 0 (LSP).

040 18 Within the Range of Output

Limits

148 11 0 = Gain

1 = Proportional Band

1 = Repeats per Minute

80 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Options

Table 5-22 lists all the I.D. Codes and ranges or selections for the function

parameters in the setup group “OPTIONS.”

Table 5-22 Setup Group-Options

Parameter

Description

Digital Input #1 186 11

Identifying

Code

Format

Code

Range or Selection

0 = None 1 = To Manual 2 = To Local Setpoint #1 3 = To Local Setpoint #2 4 = To Direct Action 5 = To Hold 6 = To PID 2 7 = PV = Input 2 8 = To Run 9 = Reset SP Program 10 = Inhibit PID Integral (I)

Action 11 = To Manual Failsafe 12 = Disable Keyboard 13 = To Automatic 14 = To Timer 15 = To Auto/Manual Station

For Digital Input combinations, see Figure 5-3

Digital Input #2 187 11 Same as Digital Input #1

(Code 186)

Digital Input Status 188 11 0 = Digital Input 1 Open

Digital Input 2 Open 1 = Digital Input 1 Closed

Digital Input 2 Open 2 = Digital Input 1 Open

Digital Input 2 Closed 3 = Digital Input 1 Closed

Digital Input 2 Closed

5/99 RS422/485 ASCII Communications Option Product Manual 81

5.11 Configuration Parameters - UDC 3000, Continued

COMRS422

Table 5-23 lists all the I.D. Codes and ranges or selections for the function

parameters in the setup group “COMRS422.”

Table 5-23 Setup Group-COMRS422

Parameter

Description

Shed Time 154 11 0 to 255 Sample Periods

Shed Controller Mode and Output Level

Shed Setpoint Recall

Identifying

Code

162 11 0 = Last Mode and Last

163 11 0 = Use UDC Setpoint as

Format

Code

Range or Selection

0 = No Shed

Output

1 = Manual Mode, Last

Output

2 = Manual Mode, Failsafe

Output

3 = Automatic Mode

determined by Remote/Local mode, LSP unchanged

Communication Units

1 = Use UDC Setpoint as

determined by Remote/Local mode, LPS = Last setpoint prior to shed

161 11 0 = Percent (%)

1 = Engineering Units

82 RS422/485 ASCII Communications Option Product Manual 5/99

5.11 Configuration Parameters - UDC 3000, Continued

Alarms

Table 5-24 lists all the I.D. Codes and ranges or selections for the function

parameter in the setup group “ALARMS.”

Table 5-24 Setup Group-Alarms

Parameter

Description

Alarm #1 SP #1 Value

Alarm #1 SP #2 Value

Alarm #2 SP #1 Value

Alarm #2 SP #2 Value

Alarm #1 SP #1 Type

Identifying

Code

009 18 Value in Engineering Units

010 18 Value in Engineering Units

011 18 Value in Engineering Units

012 18 Value in Engineering Units

140 11 0 = None

Format

Code

Range or Selection

1 = Input 1 2 = Input 2 3 = PV 4 = Deviation 5 = Output 6 = Alarm on Shed 7 = SP Event ON 8 = SP Event OFF 9 = Alarm on Manual

Alarm #1 SP #2 Type

Alarm #2 SP #1 Type

Alarm #2 SP #2 Type

Alarm #1 SP #1 State

Alarm #1 SP #2 State

Alarm #2 SP #1 State

Alarm #2 SP #2 State

Alarm Hysteresis 041 18 0 to 100.0% of full span or

142 11 Same as Code 140

144 11 Same as Code 140

146 11 Same as Code 140

141 11 0 = Low Alarm

1 = High Alarm

143 11 0 = Low Alarm

1 = High Alarm

145 11 0 = Low Alarm

1 = High Alarm

147 11 0 = Low Alarm

1 = High Alarm

full output

5/99 RS422/485 ASCII Communications Option Product Manual 83

5.11 Configuration Parameters - UDC 3000, Continued

Digital input combinations

Figure 5-3 Digital Input Combinations

For digital input combinations and addresses convert decimal to binary for read, binary to decimal for write.

18 to 255 Convert decimal to binary or binary to decimal

128 64 32 16 8 4 2 1

Selection 1 to 15

Input combinations

001 = + to PID2 010 = + to Direct 011 = + to SP2 100 = + disable adaptive

EXAMPLE:

0 1 1 0 1 1 0 0 = 108

Selection 12-Disable Keyboard + to SP2

23108

84 RS422/485 ASCII Communications Option Product Manual 5/99

Section 6 – Read, Write and Override Parameters

on UDC 5000 Ultra-Pro Controllers

6.1 Overview

Introduction

This section contains information concerning reading, writing, and overriding parameters on the UDC 5000 Ultra-Pro Controller. There are two types of parameters:

• Data Transfer—these parameters include reading control data, option status, and reading or changing setpoints or outputs.

• Configuration Data—all the configuration data is list in the order in which it appears in the controller.

Each type of parameter has the identifying codes listed with it. Follow the message exchange rules listed in “Read and Write Operations.”

5/99 RS422/485 ASCII Communications Options Product Manual 85

6.1 Overview - UDC 5000, Continued

What’s in this section

This section contains the following topics:

See Page

6.1 Overview 85

6.2 Reading Control Data 88

6.3 Option Status 89

6.4 Miscellaneous Read Only’s 90

6.5 Setpoints 92

6.6 Using a Computer Setpoint 93

6.7 Overriding the Inputs 95

6.8 PV, Setpoint, or Input Override Status or Cancellation 97

6.9 Reading or Changing the Output 98

6.10 Local Setpoint/PID Set Selection and Setpoint Ramp Status

6.11 Configuration Parameters Setup Groups

Tuning Tuning 2 SP Ramp Program Autotune/Adaptive Tune Algorithm Output Algorithm Input 1 Input 2 Input 3 Control Control 2 Options Communications Alarms Displays

101 102 103 104 107 109 113 114 116 119 121 121 123 124 125 127

86 RS422/485 ASCII Communications Options Product Manual 5/99

Honeywell UDC 2300, UDC 3000, UDC 3300, UDC 5000, UDC 6000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual