Flowserve DDC-100 Modbus Direct-to-Host User Manual download pdf (Page 3)

ii DDC-100 Direct-to-Host Programming Guide FCD LMAIM4019-00 FCD LMAIM4019-00 DDC-100 Direct-to-Host Programming Guide 1

Introduction

1.1 Premise

This Programming Guide was written for the user who is connecting Flowserve Limitorque

DDC-100 Network-compatible valve actuators directly to a control system Host computer. These

guidelines provide the information that is necessary to control and monitor the valve actuators

through a serial data communications network.

Your safety and satisfaction are very important to Flowserve. Please follow all instructions carefully

and pay special attention to safety.

1.2 Emphasis

The following methods will be used to emphasize text throughout this manual:

WARNING: Refers to personal safety. This alerts the reader to potential danger or harm.

Failure to follow the advice in warning notices could result in personal injury or death.

CAUTION: Directs attention to general precautions, which, if not followed, could result in

personal injury and/or equipment damage.

NOTE: Highlights information critical to the understanding or use of these products.

Bold text highlights other important information that is critical to system components.

CAPITALIZED text stresses attention to the details of the procedure.

Underlined text emphasizes crucial words in sentences that could be misunderstood if the word is

not recognized.

The purpose of these emphasized blocks of text is to alert the reader to possible hazards associated

with the equipment and the precautions that can be taken to reduce the risk of personal injury and

damage to the equipment.

Read and become familiar with the material in these guidelines before attempting installation,

operation, or maintenance of the equipment. Failure to observe precautions could result in serious

bodily injury, damage to the equipment, or operational difﬁculty.

Figures

Figure 4.1 – DDC-100 Redundant Loop Network 30

Figure 4.2 – DDC-100 Single-Ended Loop Network 31

Figure 4.3 – DDC-100 Single-Line Multi-Drop Network 33

Figure 5.1 – RS-232/RS-485 Converter Dimensions and Rack Mount Kit 43

Figure 5.2 – RS-232/RS-485 Cable Diagram 43

Figure 5.3 – Front and Back Panels of Steered Converter 44

Figure 5.4 – Front and Back Panels of Self-Steering Converter 46

Tables

Table 3.1 – Field Unit Communication Parameters 5

Table 3.2 – Modbus Function Codes Supported 7

Table 3.3 – DDC-100 Coil Assignments, Modbus Function Code 01 Usage for Digital Outputs 8

Table 3.4 – Status Bit Deﬁnitions 8

Table 3.4 – Status Bit Deﬁnitions (continued) 9

Table 3.5 – Field Unit Register Deﬁnitions 12

Table 3.6 – DDC-100 Coil Assignments Modbus Function Code 05 Usage for Digital Outputs 19

Table 3.7 – Modbus 06 Command and Field Unit Holding Register 40001 20

Table 3.8 – Diagnostic Codes Supported by the DDC-100 Field Unit 23

Table 4.1 – Average Field Unit Response Time 34

Table 4.2 – Average Network Scan Time (seconds) 35

Table 5.1 – RS-232/RS-485 Converter Speciﬁcations 42

Table 5.2 – Steered Converter Assembly (P/N 22300-7591) 42

Table 5.3 – Self-Steering Converter Assembly (P/N 22300-7601) 42

Table 5.4 – RS-232/RS-485 Converter (P/N 61-825-0966-4) DIP Switch Functions 44

Table 5.5 – RS-232/RS-485 Converter (P/N 61-825-0966-4) RS-232 Connector 44

Table 5.6 – RS-232/RS-485 Converter (P/N 61-825-0966-4) RS-485 Connector 45

Table 5.7 – RS-232/RS-485 Converter (P/N 61-825-0966-4) Jumpers 45

Table 5.8 – RS-232/RS-485 Converter (P/N 61-825-1032-4) RS-232 Connector 46

Table 5.9 – RS-232/RS-485 Converter (P/N 61-825-1032-4) RS-485 Connector 46

Table 5.10 – RS-232/RS-485 Converter (P/N 61-825-1032-4) Jumpers

1 47

Table 6.1 – Sample Tag Table for Direct-to-Host applications 51

1 2 3 4 5 6 7 8 ... 32 33

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Flowserve DDC-100 Modbus Direct-to-Host User Manual Page 3

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