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- Page 1 DiaLog Elite Modbus Master Interface Manual Publish Date: August 1, 2003 Document Version 1.2...
- Page 3 Government is subject to restrictions as set forth in applicable laws and regulations. Use of the materials by the Government constitutes acknowledgment of Antx's proprietary rights in them. This manual may contain other proprietary notices and copyright information that should be observed.
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Page 5: Table Of Contents
Contents About this Guide ..................................iii About this Guide ..................................iii Who Should Use this Guide ..............................iii How to Use this Guide ................................iii Conventions Used in this Guide............................iv 1 What is the Modbus Master Interface Option?.....................1 2 Initializing the Modbus Master Interface Option ....................3 From the front panel................................... - Page 6 DiaLog Elite PLC Interface Manual © Version 1.2 Antx, inc. 2001...
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Page 7: About This Guide
DiaLog Elite PLC Interface Manual About this Guide This guide is intended to describe how to install and configure the DiaLog Elite PLC Interface Option. The PLC Interface Option allows the Elite to act as a Modbus Master to communicate with a PLC as a Modbus Slave. -
Page 8: Conventions Used In This Guide
XAMPLE The power on diagnostics take about 45 seconds to complete, followed by the voice announcing: “This is DiaLog Elite. Program mode activated. System is armed. System ready. Enter selection.” Picture of key from These keys are used when a special key on the front panel must front panel be pressed to accomplish a task. - Page 9 The person answering the call acknowledges it by pressing the .* , 8 or 9 key on a Touch-Tone telephone. XAMPLE In Chapter 7, Programming the DiaLog Elite, 0 - 2 in the column means to enter a value between 0 and What you Enter...
- Page 10 DiaLog Elite PLC Interface Manual Convention Description Menu Sequence This heading and icon is used to list the menu keys that must be pressed to reach the command being discussed. This heading and icon in the margin indicates a special concern...
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Page 11: What Is The Modbus Master Interface Option
DiaLog Elite PLC Interface Manual What is the Modbus Master Interface Option? The Modbus Master Interface enables the DiaLog Elite to read input values from a PLC or Modbus Slave device and write relay control values to a PLC or Modbus Slave device. - Page 12 DiaLog Elite PLC Interface Manual © Version 1.2 Antx, inc. 2001...
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Page 13: Initializing The Modbus Master Interface Option
DiaLog Elite PLC Interface Manual Initializing the Modbus Master Interface Option This chapter provides information for setting up the PLC Interface for operation with a PLC or Modbus Slave connected to the RS-232 port. The RS-232 port is a male DB9 connection configured as a DTE device. The pin out of... -
Page 14: From The Front Panel
DiaLog Elite PLC Interface Manual From the front panel All programming prompts are spoken and shown on the display. To program the Modbus Master Interface settings: What you do: What DiaLog says: “Programming mode activated. System ready. Press (PROG mode) -
Page 15: Remotely Over A Phone
DiaLog Elite PLC Interface Manual “ Enter Slot Number” Press PROG To enable PLC I/O slots in the Elite: Valid values are: 1 for slot 10 2 for slot 20 3 for slot 30 4 for slot 40 5 for slot 50... -
Page 17: Mapping Elite Channels To Modbus Registers
DiaLog Elite PLC Interface Manual Mapping Elite channels to Modbus registers I/O channels in the Elite are mapped to PLC/Modbus registers by providing two (2) pieces of information: • Register type – which corresponds to Function Code • Register number – number of the register for the particular Function Code... - Page 18 DiaLog Elite PLC Interface Manual To program Elite channel mappings to PLC registers: What you do: What DiaLog says: “Programming mode activated. System ready. Press (PROG mode) Home PROG Enter selection.” “Channel Configuration. Enter channel number.” Press (Channel Configuration) 7. 1.
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Page 19: Programming Channel Parameters
DiaLog Elite PLC Interface Manual Programming channel parameters After the channels have been mapped to registers in the PLC, each Elite channel can be configured for alarm notification, control or for status. The programming is exactly the same as for physical channels in the Elite, so this section will not detail the specifics of the programming but outline the structure and refer the user to the Elite User Manual for further reference. -
Page 20: Digital Inputs
DiaLog Elite PLC Interface Manual Digital Inputs After entering the Register Type (Read Coil or Status) and Register Number the Elite drops down into the section that allows entering alarm and channel processing information. Channel Number [11-98] Channel State – Normally Open –... -
Page 21: Analog Inputs
DiaLog Elite PLC Interface Manual Analog Inputs After entering the Register Type (Holding or Input) and Register Number the Elite drops down into the section that allows entering alarm and channel processing information. Channel Number [11-98] Channel Conversion Decimal Position [0-5] (2) - Page 22 DiaLog Elite PLC Interface Manual – Low Limit (disabled) – High Limit (disabled) – Positive Rate of Change (disabled) – Negative Rate of Change (disabled) – Rate of Change Period (disabled) Alarm Delay [0-65535 seconds] (3) Continue alarm notification if return to normal –...
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Page 23: Relay Outputs
DiaLog Elite PLC Interface Manual Relay Outputs After entering the Register Type (Write Coil) and Register Number the Elite drops down into the section that allows entering alarm and channel processing information. Channel Number [11-98] Pulse Duration [0-86400 seconds] (0) Channel Mode –... - Page 24 DiaLog Elite PLC Interface Manual © Version 1.2 Antx, inc. 2001...
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Page 25: Running The Modbus Master Interface
DiaLog Elite PLC Interface Manual Running the Modbus Master Interface The Elite to PLC/Modbus communication starts for the first time when the Elite is put into RUN mode after programming at least one channel for PLC/Modbus I/O. The communication will continue running in RUN or PROGramming mode. The communication stops when changing parameters relating to the PLC setup –... -
Page 26: Modbus Comm. Failure Alarm
DiaLog Elite PLC Interface Manual Modbus Comm. Channel in alarm 06 Communication Op – Open – Loss of Failure Alarm communication Al - Alarm Exit Scrl The Modbus Communication Failure Alarm can be caused by: • incorrect physical connection •... - Page 27 DiaLog Elite PLC Interface Manual Enter in the channel to view. The following display is shown. Channel number and name 71 MBUS Chan 71 123.45 gals Current value and engineering units for Exit Scrl a Holding register © Antx, inc. 2001...
- Page 28 DiaLog Elite User Manual Version 1.2 © 2000 Antx, inc.
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