Antx DiaLog Elite User manual

DiaLog Elite
Modbus Master Interface Manual
Publish Date: August 1, 2003
Document Version 1.2

Copyright and Trademark Information
All Pages Copyright © 2001 Antx, inc. All Rights Reserved.
U.S. Government Users Restricted Rights. Use, duplication, or disclosure by
the 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.
Information in this document is subject to change without notice. The software
described in this document is furnished under a license agreement or
nondisclosure agreement. The software may be used or copied only in
accordance with the terms of those agreements. No part of this publication may
be reproduced, stored in a retrieval system, or transmitted in any form or any
means electronic or mechanical, including photocopying and recording for any
purpose other than the purchaser’s personal use without the written permission
of Antx, inc.

Version 1.2
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...................................................................................................................................................................4
Remotely over a phone..............................................................................................................................................................5
3 Mapping Elite channels to Modbus registers.......................................................................................................7
Programming channel parameters.............................................................................................................................................9
Digital Inputs.......................................................................................................................................................................10
Analog Inputs......................................................................................................................................................................11
Relay Outputs.....................................................................................................................................................................13
4 Running the Modbus Master Interface................................................................................................................15
Viewing Alarms........................................................................................................................................................................15
Modbus Comm. Failure Alarm............................................................................................................................................16
I/O channel alarm................................................................................................................................................................16
Confirming Modbus Slave Communication..............................................................................................................................16

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DiaLog Elite PLC Interface Manual
© Antx, inc. 2001 Version 1.2 iii
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.
Who Should
Use this
Guide
This manual is intended for use by operations technicians who are responsible for installing
and configure the DiaLog Elite hardware.
How to Use
this Guide This guide is divided into the following chapters:
Chapter 1, What is the Modbus Master Interface Option. Describes the capabilities of the
Modbus Master interface option.
Chapter 2, Initializing the Modbus Master Interface Option. Describes how to set up the
Interface for operation with a PLC or Modbus I/O.
Chapter 3, Mapping Elite channels to PLC registers. Describes how to program the Elite I/O
channels to reference Modbus Slave registers.
Chapter 4, Running the Modbus Master Interface. Describes how to view the current status
of the Modbus Master Interface in real-time.
In this manual, the terms DiaLog Elite and DiaLog are used interchangeably.

DiaLog Elite PLC Interface Manual
Conventions
Used in this
Guide
To help you understand the information in this guide, a consistent set of documentation
conventions are used to represent certain material.
The following table describes the typographic conventions used in this guide to help you
locate and interpret information.
Convention Description
Italic text Indicates a parameter that you can set.
EXAMPLE:
DiaLog accepts a return call as an acknowledgement of all
alarms if you enable the Call In Acknowledge feature. The call
must come during the 30-second Between Calls Delay, or
DiaLog calls the next number on the list.
Courier font Indicates messages shown on the DiaLog display or information
printed on reports.
EXAMPLE:
If parameters for channel 7 were set up as follows, then this
message appears on the pager’s display:
NORTHWEST FACILITY-7 NO 2 TANK LEVEL HI 101.5
GALS
“Text enclosed in
quotes”. Indicates messages that DiaLog speaks.
EXAMPLE:
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
front panel
Home ,1
Prog ,2 Run ,#
Enter ,Ack
Clear
Arm
Reset ,Disarm
Bks
p
,0
Status ,5 S
p
krPh
These keys are used when a special key on the front panel must
be pressed to accomplish a task.
EXAMPLE:
Press Home 2
Run to enter RUN mode.
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© Antx, inc. 2001 Version 1.2 v
Convention Description
Small rectangular
representation of key
0.1 2 3.4.5.
.6 7.8.9.0.*.
.#.F1.F2.F3.F4.
Indicates keys to press when entering parameter values at the
keypad or when communicating with the DiaLog via a touch-
tone telephone.
EXAMPLE 1:
The person answering the call acknowledges it by pressing the
.* , 8 or 9 key on a Touch-Tone telephone.
EXAMPLE 2:
In Chapter 7, Programming the DiaLog Elite, 0 - 2 in the
What you Enter column means to enter a value between 0 and
2.
Small rounded
rectangular
representation of a key
These keys are used in Chapter 7, Programming the DiaLog
Elite, to indicate menu selections. These are used in both the
Road Map and the Menu Sequence headings.
0123 EXAMPLE:
4567 9Æ0Æ3
8 9 Means to press the keys 9, 0 and 3 to reach the command.
Road Map ÞThis heading and icon is used at the beginning of a function
description to indicate the complete key sequence that the user
takes to reach the function being described. The Road Map also
includes other parameters within that function.
EXAMPLE:
Channel
Configuration
Relay
Output
Channels
Channel
Number
9Æ3
Æn n
0 Pulse Duration [0-65535]
1 De-energize Relay on Ack.[0-1]
2 Channel Mode [0-1]
3 Channel Alpha ID [A-Z, 0-9]
Description This heading and icon is used to present an overview of the
function being discussed.
Field Summary This heading and icon is used to list all parameters that must be
entered for the function. The heading includes the name of the
Field, Range of values that can be entered, and Factory
Setting.
EXAMPLE:
Field Range Factory Setting
Alarm Delay 0-65535 seconds 3

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Convention Description
Menu Sequence ÆThis heading and icon is used to list the menu keys that must be
pressed to reach the command being discussed.
CAUTIONaThis heading and icon in the margin indicates a special concern
that you should take into consideration when performing an
action. Cautions not followed could result in danger.
WARNING!ÌThis heading and icon in the margin indicates advice to heed
when performing an action. Warnings not followed could result
in damage to the equipment or personal harm.
NOTE This heading and icon in the margin indicates any exceptions or
additional points to the topic being discussed.
EXAMPLE ¾This heading and icon in the margin indicates that the text
contains an illustration of a point being discussed.

DiaLog Elite PLC Interface Manual
1
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.
The connection uses the RS-232 serial connector on the Elite. The protocol is Modbus
RTU, where the Elite is the Master and the PLC or Modbus I/O is the Slave.
The option supports a combination of up to 72 total I/O channels – up to 48 of which can
be physical I/O in the Elite.
The I/O in the Modbus Slave can be any combination of analog (holding registers) or
digital points (coils).
Values that are read from the Modbus Slave are interpreted by the Elite the same as if they
were physical I/O in the Elite. All the alarm and control logic within the Elite operate on
data coming from Modbus registers.
The communications link between the Elite and the PLC is monitored several times a
second. If the communications link stops functioning after repeated attempts, a
Communications Channel (06) alarm is initiated. This alarm is treated exactly like any
other system alarm allowing the system to call out, drive local relay or issue reports.
The Modbus Master option does not require the Modbus RTU Option in the Elite, but both
can be installed. When both are installed, the Elite acts as a Modbus Master to the PLC
and a Modbus Slave to your SCADA software or to another Elite.
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2
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
this connector is:
Pin 2 RX
Pin 3 TX
Pin 5 GND
The Modbus Master Interface is setup by defining the:
•Serial port baud rate – default is 38400
•PLC/Modbus ID – default is 1
•Defining Elite I/O slots to be identified as PLC/Modbus I/O – default is that no slots
are enabled as PLC I/O slots.
There are 8 PLC I/O channels per Slot. You can enable as many slots as you have
purchased. For example, if you purchased a 32-channel PLC configuration, then you
can enable any 4 slots which do not have physical I/O cards attached.
All of these can be defined either through the integral keypad or remotely via a phone.
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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:
Press Home 1
PROG (PROG mode) “Programming mode activated. System ready.
Enter selection.”
Press
8 (Options Setup) “Options setup. Enter selection.”
Press 0
Status
Valid values are:
1200
2400
4800
9600
19200
38400 - default
115200
“Serial Port Setup. Press Pound (#) if OK or enter
a new value.”
Enter your baud rate. For example:
9 6 0 0 #.
“The new rate is 9 thousand 6 hundred. Enter
selection.”
Press 2
Run “MODBUS PLC Setup. Enter selection.”
Press 0
Status
Enter the Modbus ID for the PLC.
For example:
“The PLC ID number is 1. Press Pound (#) if OK
or enter a new value.”
0 0 5 “The new PLC ID number is 5. Enter selection”
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Press 1
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 6 for slot 60
7 for slot 70 8 for slot 80
9 for slot 90
“ Enter Slot Number”
For example:
3
“MODBUS slot 3 is disabled. Press # if OK, 0 to
disable or 1 to enable.”
1 “MODBUS slot 3 is enabled. Enter Slot Number”
Repeat entering Slot numbers as
needed. When finished:
Press Home
“Program mode activated. System ready. Enter
selection.
Remotely over a phone
The sequence is exactly the same as from the front panel except that instead of pressing the
HOME key, press *.6.
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DiaLog Elite PLC Interface Manual
3
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
Elite
Register
Type
Description Type of channel in
the Elite Modbus Function
Code
1 Read Coil Status Digital 01
2 Read Input Status Digital 02
3 Read Holding Register Analog 03
4 Read Input Register Analog 04
5 Write Coil Relay 05
The register type and register number are defined in the Channel Configuration section of
the Elite.
NOTE Register types (Function Codes) can be mixed within a single slot in the Elite.
For example,
If Slot 70 is a PLC/Modbus I/O slot,
channel 71 can be a Read Coil Status (1),
channel 72 can be a Holding (3), and
channel 73 can be a Write Coil (5).
The following example shows the steps to identify channels in the Elite that map to PLC
channels:
Elite Channel PLC register
71 (1)0050
72 (3)0121
73 (5)1001
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To program Elite channel mappings to PLC registers:
What you do: What DiaLog says:
Press Home 1
PROG (PROG mode) “Programming mode activated. System ready.
Enter selection.”
Press
9 (Channel Configuration) “Channel Configuration. Enter channel number.”
Press 7.1.
Valid values are:
1 – 5 for function codes (01 – 05)
“The register type is unknown. Press # if OK or
enter a new selection.”
Press 1.
“The new register type is coil. Register number is
0. Press # if OK or enter a new value.”
Press 5.0.#.“The new register number is 50. Digital input
channel 71. Enter selection.”
Press #.“Channel Configuration. Enter channel number”
Press 7.2.“The register type is unknown. Press # if OK or
enter a new selection.”
Press 3.
“The new register type is holding. Register number
is 0. Press # if OK or enter a new value.”
Press 1.2.1.#.
“The new register number is 121. Analog input
channel 72. Enter selection.”
Press #.“Channel Configuration. Enter channel number”
Press 7.3.“The register type is unknown. Press # if OK or
enter a new selection.”
Press 5.
“The new register type is write coil. Register
number is 0. Press # if OK or enter a new value.”
Press 1.0.0.1.#.
“The new register number is 1001. Relay output
channel 73. Enter selection.”
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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.
While the Elite supports 5 register types, or Function Codes, these are mapped to three (3)
types of I/O channels in the Elite.
•Digital inputs
•Analog inputs
•Relay outputs
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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.
n n.Channel Number [11-98]
0Channel State
0 – Normally Open
1 – Normally Closed
1Channel Messages
Alarm message (8 seconds)
Normal message (8 seconds)
2Channel Mode
0 – Disabled
1 – Status Only
2 – Call on Alarm
3 – Call on Limit
0 – Totalizer Limit [0-999,999,999 counts] (0)
Scaling Value [1-1000] (1)
Engineering Units [0-27] (0)
1 – Duration Limit [0-999,999,999 secs] (0)
2 – Limit Reset Period [0-999,999 mins] (0)
3 – Reset Counters on Acknowledge
0 – Disabled 1 – Enabled
3Alarm Delay [0-65535 seconds] (3)
4Continue alarm notification if return to normal
0 – Disabled 1 – Enabled
5Telephone list [1-16] (1)
6Relay channel to activate – [0-disabled, 11-98]
Relay state on Normal to Alarm is
0 – De-energized
1 – Energized
2 – Disabled
Relay state on Alarm to Normal is
0 – De-energized
1 – Energized
2 – Disabled
De-energize on alarm acknowledge
0 – Disabled 1 – Enabled
7Channel Alphanumeric ID (CHAN nn)
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