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

ii DDC-100 Direct-to-Host Programming Guide FCD LMAIM4019-00 FCD LMAIM4019-00 DDC-100 Direct-to-Host Programming Guide 1
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:
c 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.
a 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