Omega Products D6700 Installation Manual

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D6000 SERIES

Digital Transmitters,

Modbus RTU, RS-485 Output

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User’s Guide

Extended Warranty

Program

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Table of Contents:

1.0 Introduction

2.0 Configuration

2.1 Getting Started

3.0 Communications

3.1 RS-485 Serial

4.0 Module Types

4.1 D6100 Seven Channel Voltage Input Module

4.1.1 Analog to Digital Converter

4.1.2 Connector Pin Assignments

4.1.3 Factory Initial Values

4.1.4 Features Register Assignments

4.1.5 Calibration Procedure

4.2 D6200 Seven Channel Current Input Module

4.2.1 Analog to Digital Converter

4.2.2 Connector Pin Assignments

4.2.3 Factory Initial Values

4.2.4 Features Register Assignments

4.2.5 Calibration Procedure

4.3 D6300 Seven Channel Thermocouple Module

4.3.1 Analog to Digital Converter

4.3.2 Connector Pin Assignments

4.3.3 Factory Initial Values

4.3.4 Features Register Assignments

4.3.5 Calibration Procedure

4.4 D6400 Seven Channel Voltage, Thermocouple, Current Input Module

4.4.1 Analog to Digital Converter

4.4.2 Features Register Assignments

4.4.3 Factory Initial Values

4.4.4 Calibration Procedure

4.4.5 Connector Pin Assignments

4.4.6 D6400 Current Channel Enable

4.5 D6500 Two Channel Analog Output Module

4.5.1 Analog Outputs

4.5.2 Features Register Assignments

4.5.3 Factory Initial Values

4.5.4 Voltage Output Calibration Procedure

4.5.5 Current Output Calibration Procedure

4.5.6 Analog Output Calibration Register Tables and Values

4.6 D6710 Fifteen Bit Digital Input Module

4.6.1 Digital Inputs

4.6.2 Connector Pin Assignments

4.6.3 Factory Initial Values

4.6.4 Features Register Assignments

4.7 D6720 Fifteen Bit Digital Output Module

4.7.1 Digital Outputs

4.7.2 Connector Pin Assignments

4.7.3 Factory Initial Values

4.7.4 Features Register Assignments

4.7.5 Communications Watchdog Timer

1

5.0 Modbus Protocol

5.0 Functions

5.1 Function 01 – Read Coil Status

5.2 Function 02 – Read Input Status

5.3 Function 03 – Read Holding Registers

5.4 Function 04 – Read Input Registers

5.5 Function 05 – Force Single Coil

5.6 Function 06 – Preset Single Register

5.7 Function 0F – Force Multiple Coils

5.8 Function 10 – Preset Multiple Registers

6.0 Modbus Exception Error Codes

6.0 Modbus Register Assignments

6.1 Seven Channel Voltage Input Register Assignments

6.2 Seven Channel Current Input Register Assignments

6.3 Seven Channel Thermocouple Input Register Assignments

6.4 Seven Channel Voltage, Thermocouple and Current Input Register Assignments

6.5 Two Channel Analog Voltage and Current Output Register Assignments

6.6 Fifteen Bit Digital Output Register Assignments

6.7 Fifteen Bit Digital Input Register Assignments

7.0 Calibration Procedures

7.1 Seven Channel Voltage Input Module

7.2 Seven Channel Current Input Module

7.3 Seven Channel Thermocouple Input Module

7.4 Seven Channel Voltage, Thermocouple and Current Input Module

7.5 Two Channel Analog Voltage and Current Output Module

7.6 Fifteen Bit Digital Output Module

7.7 Fifteen Bit Digital Input Module

2

1.0 Introduction

The D6000 series RS-485 serial interface modules are a complete family of data acquisition
modules. The family of modules includes multi-channel analog input measurement modules,
multiple channel analog output modules, and digital modules.

The D6000 series modules communicate using the Modbus RTU protocol. This protocol very
popular in the data acquisition market and is supported by almost every commercial data
acquisition program in the market today. Thus providing access to wide variety of software control
programs that can meet almost any application budget.

The D6000 series analog input modules contain seven differential analog input channels and can
measure voltages, current, and thermocouples. There are four versions available, the D6100,
D6200, D6300 and the D6400. The D6100 module can measure DC voltage signals. The D6200
module can measure seven 4-20mA current loops. The D6300 series can measure eight user­selectable thermocouple types. The D6400 series can measure six selectable voltage input
ranges, one current input range, and eight selectable thermocouple types.

The D6500 series analog output modules contain two output channels for generating either a
voltage or current output signal. Each analog output channel is user-selectable as either a voltage
or a current output. These analog output signals can be used as control inputs for items such as
motor controls, valve controls, and other control devices. Each analog output channel also
contains a programmable communications watchdog timer for instances when communications to
the module is lost.

The D6700 series digital input and output modules each contain 15-bits of input or output. The
digital input modules contain internal pull-ups on each bit for direct connection of dry contact
switches. The digital outputs are open-collector outputs that can be connected up to 30Vdc and
can sink 100mA per bit. The open-collector allows the modules to be used in a wider variety of
control applications. The digital output module also contains a programmable watchdog timer for
instances where communications to the module is lost.

Mixing and matching the D6000 series modules together in an application provides a user with all
the measurement and control hardware for a complete process control system.

3

1.0 Configuration & Getting Started

Default Mode

All D6000 series modules contain an EEPROM (Electrically Erasable Programmable Read Only
Memory) to store setup information and calibration constants. The EEPROM replaces the usual
array of switches and pots necessary to specify baud rate, address, parity, etc. The memory is
nonvolatile which means that the information is retained even if power is removed. No batteries
are used so it is never necessary to open the module case.

The EEPROM provides tremendous system flexibility since all of the module’s setup parameters
may be configured remotely through the communications port without having to physically change
switch and pot settings. There is one minor drawback in using EEPROM instead of switches;
there is no visual indication of the setup information in the module. It is impossible to tell just by
looking at the module what the baud rate, address, parity and other settings are. It is difficult to
establish communications with a module whose address and baud rate are unknown. To
overcome this, each module has an input pin labeled DEFAULT*. By connecting this pin to
Ground, the module is put in a known communications setup called Default Mode.

The Default Mode settings are: 9600 baud, one start bit, eight data bits, one stop bit, no parity,
any address is recognized. The module will answer to address “01” in the Default Mode.

Grounding the DEFAULT* pin does not change any of the setups stored in EEPROM. The setup
information may be read back to determine all of the setups stored in the module.

Setup information in a module may be changed at will in the Default Mode. The baud rate and
parity setups may be changed without affecting the Default Mode values of 9600 baud and no
parity. When the DEFAULT* pin is released, the module automatically performs an internal reset
and configures itself to the baud rate and parity stored in the setup information.

The Default Mode should only be used with a single module connected to a computer for the
purpose of identifying and modifying setup values. In most cases, a module in Default Mode may
not be used in a string with other modules.

Communications Connections

The D6000 series module must be connected to a host computer with an RS-485 serial port for
configuration. For computers that contain an internal RS-232 port then the A1000 RS-232 to RS­485 serial converter can be used to connect the module to a computer. For computers without
internal serial ports then a USB to RS-485 converter can be used to connect the module to a
computer. The RS-485 serial connections for both devices are detailed below.

A1000 RS-485 Connections

A1000 RS-485 Out Connector D6000 Module Connector

(B) GND GND

(R) +VS +VS
(G) DATA- DATA­(Y) DATA+ DATA+

USB to RS-485 Connections

Your USB Connector D6000 Module Connector

Ground GND

Data- DATA-

Data+ DATA+

Note: When using the USB converter a separate power supply will be
required and connected between the +VS and GND terminals.

4

DEFAULT Mode Connection

For simplicity, we recommend performing all the setups while in the Default Mode. Place the
D6000 in Default Mode by connecting the DEFAULT* terminal to the GND terminal using a
jumper wire. When the module is in the Default Mode the serial parameters are internally set to:
9600 Baud, 8 data bits, no parity and one stop bit. The module will respond to Modbus Slave
address “01”.

Note: No other wiring connections are required on the analog or digital I/O pins to perform the
module configuration.

1.1 Getting Started

The first step towards “Getting Started” with your D6000 series module is to connect the module
to an RS-485 serial port using the wiring connections above. Included within the wiring
connections is the “Default*” line being connected to the power supply ground. This connection
places the module in the “Default Mode”. The Default Mode forces the module into a known
communications state and is best utilized for configuring the module. The Default Mode serial
communications parameters are: 9600 baud, eight data bits, no parity and one stop bit. The
module will answer to Modbus Slave address “1” (0x01).

The D6000 series modules require a software program to change the setup register values. Since
the modules communicate via the Modbus RTU protocol, a Modbus Master program or the
D6000 series Utility Software will be required to change the module configuration.

The D6000 Series Utility Software is the best program to use when configuring a module. The
utility software reads the module information, displays the information in easy to understand
terms, allows changes to be made via drop-down list boxes and then writes the new values back
to the module. The module parameters can also be stored to disk and recalled at a later date.

The D6000 series Utility Software is provided free of charge on CDROM with a purchase order
and the latest version is always downloadable from www.omega.com. The utility software runs on
Windows based computers. Simply insert the CDROM into the CDROM drive, or download the
Setup.Exe file from the website, and then run the SETUP.EXE installation file. The software will
install and create a menu section called “Omega Utility Software” and the Utility Software will be
under that selection.

From the computer desktop select the “start” button, select “all programs”, select “Omega Utility
Software” and then select “D6000 Series Utility Software” to run the utility software. When the
software opens the first step is to select, configure and open the host serial communications port
where the module is connected.

5

Select the “Serial Port” connection type in the upper left corner of the program screen and then
select the proper communications port in the upper right hand corner of the screen. Next, press
the Serial Port “Settings” button.

If the “Default*” line is connected to ground then select 9600 baud, no parity, eight data bits, one
stop bit, RTS Only handshaking and the Tx and Rx delays can be left in their default state.
Otherwise, adjust the communications settings to match the settings in the connected module.

Press the “Open Port” or “Update” button to complete the serial port configuration process.

Test Communications

After the utility software serial port has been configured the next step would be to check for valid
communications between the computer and the module. You must have valid communications
with the module before trying to perform the configuration process. To test the communications,

6

set the Modbus Address to 01 in the “Default Mode” or set the Modbus Address to match the
setting in the module. Set the Function selector to 03 and the Register selector to 40001. Press
the “Send” button to verify communications. A module response will be shown in the figure below.

The figure above illustrates the Modbus function 03 being sent to Modbus Slave address 01. Both
the command and response messages are displayed beginning with CMD and RSP respectively.
This display format is provided for troubleshooting purposes as it displays each byte of
information being sent to and received from the module. This format can be a good
troubleshooting tool or a way to become familiar with the formatting of the Modbus RTU protocol.

The response data value from register 40001 is located in the RSP: line. The data value returned
is a 16-bit value located in the fourth and fifth bytes in the message (00 01). The “00 01” indicates
that the register value is 0001. From the 7CH Current Input Modbus Register map, register 40001
is the Modbus Slave address value. In the case the module slave address value is read back as

0001.
In the event that the module was not detected by the software then the RSP: line would say

“RSP: Timeout – No Response Detected!”. Several things can contribute to this problem. Some
examples are no power to the module, bad RS-485 wiring connection(s), invalid port settings, or
RS-485 half-duplex handshaking problems all can cause timeout errors. Timeout errors must be
corrected before attempting to configure a module.

Setup a Module

After a successful communications test has been performed then the module can be configured.
Select the type of module using the drop-down list box under “Quick Setup” in the lower left hand
corner of the screen. Then press the “Setup” button. A new screen (see below) will appear that
contains list of all the user-selectable module values. Several different screens can appear. Each
screen is specific to the type of module connected. The screen below is for a seven channel
current input module.

7

Ensure that the Module Address in the lower left corner is 01 and then press the “Read Setup”
button. The screen will now populate with the existing configuration data inside the module.

The user-selectable values will be displayed in an easy to understand format and new selections
can be made using the drop-down list boxes. The drop-down list boxes make the configuration
process easy and accurate because erroneous values cannot be entered.

8

Once the new module configuration settings have been changed to meet the application
requirements then press the “Apply” button to transmit the new settings.

Scan Module Data Values

After the module has been properly configured, the analog input module configuration screens
can poll modules in order to verify the data from each channel. This feature is a good
troubleshooting or verification tool when the analog input signals are physically connected to the
module.

The analog input screens contain a “Scan” button that will start the scanning process. Each data
channel is read by requesting the data values from data registers within the module. The analog
input data registers can be found in the Modbus Register map and the data register locations are
specific to the module type.

The data values are returned in hexadecimal percentage of Full Scale format where a value of
0x0000 represents the minus full scale input of the module. A value of 0xffff represents the
positive full scale input of the module. These values can be used as check to ensure that the
channels are operating properly when analog input signals are applied to the input terminals.

The data values can also be displayed as a numerical value. The utility software knows the plus
and minus full scale input limits for each channel. Using the raw hexadecimal percentage of full
scale data values the software can convert these readings to millivolts, milliamps, or temperature
readings. Simply uncheck the “Display Hex Values” selection underneath the channel readings to
display the numeric values.

The scanning process will also log and display the highest (peak) and lowest (valley) readings
that were recorded during the scanning process. This is just for indication purposes only.

A scan interval slide control is also provided to speed up or slow down the scanning process. This
slide control allows the channels to be scanned at intervals from 0.5 to 5 seconds.

9

3.0 Communications

Each D6000 series module contains a two-wire RS-485 serial interface for communications. The
RS-485 communications standard was developed to satisfy the need for multi-dropped systems
that can communicate at high data rates over long distances. RS-485 is similar to RS-422 in that
it uses a balanced differential pair of wires switching from 0 to 5V to communicate data. RS-485
receivers can handle common mode voltages from -7V to +12V without loss of data, making them
ideal for transmission over great distances. RS-485 differs from RS-422 by using one balanced
pair of wires for both transmitting and receiving. Since an RS-485 system cannot transmit and
receive at the same time it is inherently a half-duplex system.

RS-485 offers many advantages:

1) balanced line gives excellent noise immunity

2) can communicate with modules at high baud rates

3) communicate at distances up to 4,000 feet.

4) true multi-drop configuration as the modules are connected in parallel

5) individual modules may be disconnected without affecting other modules

6) up to 32 modules on one segment of the communications line; 247 with repeaters

7) simplified wiring using standard telephone cable
Figure 2.0 below illustrates the wiring required for multiple-module RS-485 system. Notice that

every module has a direct connection to the host system. Any number of modules may be
unplugged without affecting the remaining modules. Each module must be setup with a unique
address and the addresses can be in any order. Also note that the connector pins on each
module are labeled with notations (B), (R), (G), and (Y).

Figure 2.0 Typical RS-485 Serial Communications System Architecture

This designates the colors used on standard 4-wire telephone cable:
(B) GND Black Wire

(R) V+ Red Wire
(G) DATA* Green Wire (RS-485 DATA-)
(Y) DATA Yellow Wire (RS-485 DATA+)

This color convention can be used to simplify installation. If standard 4-wire telephone cable is
used, it is only necessary to match the labeled pins with the wire color to guarantee correct
installation. The RS-845 data lines are designated on the label as DATA* and is the complement
of DATA (negative true). To minimize unwanted reflections on the transmission line, the bus

10

should be arranged as a line going from one module to the next. ‘Tree’ or random structures of
the transmission line should be avoided. For wire runs greater than 500 feet, each end of the line
should be terminated with a 220 ohm resistor connected between DATA and DATA*.

When using a bi-directional RS-485 system, there are unavoidable periods of time when all
stations on the line are in receive mode. During this time, the communications lines are left
floating and are very susceptible to noise. To prevent the generation of random characters, the
lines should be biased in a MARK condition as shown in Figure 2.0. The 1K resistors are used to
keep the DATA line more positive than the DATA* line when none of the RS-485 communications
transmitters are on.

When enabled, the low impedance of an RS-485 driver easily overcomes the load presented by
the resistors. Special care must be taken with very long busses (greater than 1000 feet) to ensure
error-free operation. Long busses must be terminated as described above. The use of twisted
cable for the DATA and DATA* lines will greatly enhance signal fidelity.

In situations where many modules are used on a long line, voltage drops in the power leads
becomes an important consideration. The GND wire is used both as a power connection and the
common reference for the transmission line receivers in the modules. Voltage drops in the GND
leads appear as a common-mode voltage to the receivers. The receivers are rated for a
maximum of -7Vdc of common-mode voltage. For reliable operation, the common mode voltage
should be kept below -5V. To avoid problems with voltage drops, modules may be powered
locally rather than transmitting the power from the host.

Inexpensive ‘calculator’ type power supplies are useful in remote locations. When local supplies
are used, be sure to provide a ground reference with a third wire to the host or through a good
earth ground. With local supplies and an earth ground, only two wires for the data connections
are necessary.

11

4.0 Module Types

The D6000 series RS-485 serial interface modules are a complete family of data acquisition
modules. Mixing and matching the D6000 series modules together in an application provides a
user with all the measurement and control hardware to build a complete process control system.
The family of modules includes multi-channel analog input measurement modules, multiple
channel analog output modules, and digital modules.

D6100 Voltage Input Module

The D6100 series analog input modules contain seven differential inputs for measuring DC
voltages. Each input can be individually configured to measure one of six different voltage
ranges. The input ranges are: +/-0.025V, +/-0.05V, +/-0.10V, +/-1V, +/-5V and +/-10V.

D6200 Current Input Module

The D6200 series analog input module contains seven differential inputs for measuring current
signals such as 4-20mA loops. The analog input range is factory configured for +/-20mA.

D6300 Thermocouple Input Module

The D6300 series analog input module contains seven differential inputs for measuring
thermocouple probes. Each input can be individually configured to measure one of eight different
thermocouple types. The supported thermocouple types are: J, K, T, E, R, S, B and C.

D6400 Voltage, Thermocouple and Current Input Module
The D6400 series analog input module contains seven differential inputs for measuring DC

voltages, thermocouples and current. Each input can be individually configured to measure one of
fourteen different ranges. The supported thermocouple types are: J, K, T, E, R, S, B and C. The
DC voltage input ranges are: +/-0.025V, +/-0.05V, +/-0.10V, +/-1V, +/-5V and +/-10V and the
current input range is +/-20mA.

D6500 Analog Output Module

The D6500 series analog output modules contain two analog output channels for generating
either a voltage or current output signal. Each analog output channel contains two user-selectable
voltage output ranges and two current output ranges. These analog output signals can be used
as control inputs for items such as motor controls, valve controls, and other control devices. Each
analog output channel also contains a programmable communications watchdog timer for
instances when communications to the module is lost.

D6700 Digital Inputs/Output Module

The D6700 series modules each contain 15-bits of digital inputs or digital outputs. The D6710 15­bit digital input module contains internal pull-ups on each bit for direct connection to dry contact
switches.

The D6720 digital output modules contain fifteen open-collector outputs that can be connected up
to 30Vdc and can sink 100mA per bit. The open-collector outputs allow the modules to be used in
a wide variety of control applications. The digital output module also contains a programmable
communications watchdog timer for accidental instances where communication to the module is
lost.

12

4.1 D6100 - Seven Channel Voltage Input Module

Overview

The D6100 series analog input modules contain seven differential analog inputs that can
measure six different DC voltage ranges. Each analog input channel is user programmable and
may be assigned to measure a different range. Any unused channels can be disabled.

Analog to Digital Converter

The D6100 series analog input modules contain a 16-bit analog to digital converter to perform the
signal conversion to digital information. The analog to digital converter performs a total of 25
conversions per second. Meaning, if all 7 channels were enabled the each channel would be
measured 3+ times per second. The conversion rate per channel can be improved by disabling
any unused channels.

Features and Register Assignments

The D6100 series analog input modules contain many user-selectable features. The user can
select all features such as baud rate, parity type, analog range selection and digital filtering. The
complete list of features is illustrated in the “Seven Analog Voltage Input Register Assignments”
register map below. The register map format is used for consistency with the Modbus RTU
protocol. The register map contains the register numbers in decimal format, register description,
acceptable data values, and list of what each value means. These registers can be written to
using most any Modbus master program or using the D6000 series utility software.

Note: All Modbus Register values in the tables below are represented as “decimal” numbers.

Factory Initial Values

The D6100 series analog module features are initialized at the factory with a set of “Initial
Values”. A complete list of factory “Initial Values” can be found in the table below. For reference
purposes, the Modbus Slave address is preset to hex 0x01, the baud rate is 9600, Parity type is
None and the Stop Bits is “1”.

Calibration

The D6100 series analog input modules are shipped from the factory as fully calibrated devices.
Throughout the lifetime of the module there may be need to verify or adjust the calibration of the
device. The verification and adjustment process should only be completed using NIST traceable
calibration equipment. A D6100 series Calibration procedure is included below.

Connector Pin Designations

The D6100 series module uses two 3.81mm removable plugs for connecting signals to the
module. One six-pin connector is for the power supply and the host RS-485 data line
connections. A second sixteen-pin connector is used to connect analog input signals to the
module. The pin designations for each connector are printed on the module label and are listed in
a table below.

13

4.1.2 Seven Voltage Input Pin Assignments and Specifications

Connections
Power & Serial Communications

Pin Number Pin Designator
1 GND - Power Supply
2 +VS + Power Supply
3 Data- RS-485 Data­ 4 Data+ RS-485 Data+
5 Default* Default*
6 GND - Power Supply

Analog Input Pin Assignments

Pin Number Pin Designator
1 CH1+ CH1 +Input
2 CH1- CH1 -Input
3 CH2+ CH2 +Input
4 CH2- CH2 -Input
5 CH3+ CH3 +Input
6 CH3- CH3 -Input
7 CH4+ CH4 +Input
8 CH4- CH4 -Input
9 CH5+ CH5 +Input
10 CH5- CH5 -Input
11 CH6+ CH6 +Input
12 CH6- CH6 -Input
13 CH7+ CH7 +Input
14 CH7- CH7 -Input
15 ISO. GND Isolated GND
16 ISO. GND Isolated GND

Specifications

Analog Inputs 7 Channels
User Selectable Input Ranges

Bipolar Voltage 10V, 5V, 1V,

Differential Reading
CH to CH

Protocol
Serial Modbus RTU

Power Supply
Voltage +10-30Vdc
Power 1.4W

Connectors
Spacing 3.81mm
Max Wire Size 14-24 AWG
Max Current 8 Amperes

Serial LED Displays
Transmit (Top) Serial TxData
Receive (Bottom) Serial RxData

0.1V, 0.05V,

0.025V

14

4.1.3 Seven Voltage Input Initial Values

Module Parameter Value

Slave Address 1
Baud Rate 9600
Parity Type None
Modbus Response Delay 3mS
Modbus Query Delay 0mS
Conversion Rate 60Hz
Large Signal Filter 0 Seconds
Small Signal Filter 0 Seconds
Channel 0 Range +/-10Vdc
Channel 1 Range +/-10Vdc
Channel 2 Range +/-10Vdc
Channel 3 Range +/-10Vdc
Channel 4 Range +/-10Vdc
Channel 5 Range +/-10Vdc
Channel 6 Range +/-10Vdc

15

4.1.4 Seven Voltage Input Register Assignments

Register Description Function Value Description

40001 Slave Address R/W 1-DF Factory set to 0x0001.
40002 UART Setup R/W Bits 0-4 Baud Rate

5=9600
6=19.2K
7=38.4K
8=57.6K
9=115.2K

Bits 5-6 Parity
0=No Parity, 8-N-2
1=Odd
2=Even
3=No Parity, 8-N-1

Factory set to 0x0035 = 9600, 8, N, 1.

40003 Modbus Delays R/W 0-303F Bits 0-7

The Response Delay in milliseconds. This is
required when the RS-485 adapter cannot
tri-state immediately after the last character
is transmitted from the host. Maximum value
is 63mS. Factory default value is 3.

Bits 8-15
The End of Query Delay in milliseconds
(48mS max). This is an additional time that
the module will wait prior to marking the end
of the message. Slower host computers may
not be able transmit a continuous message
stream, thereby creating gaps between
characters exceeding the normal 3.5
character times limit. Factory default value is

0.

Factory set, 0x0003.

40033 Software Version R Factory set, Code Version.
40048 Last Converted

Chan,
Conversion
Counter

40049 Channel 0 Data R 0-FFFF Data - Ch 0, Offset binary, zero=0x8000.
40050 Channel 1 Data R 0-FFFF Data - Channel 1
40051 Channel 2 Data R 0-FFFF Data - Channel 2
40052 Channel 3 Data R 0-FFFF Data - Channel 3
40053 Channel 4 Data R 0-FFFF Data - Channel 4
40054 Channel 5 Data R 0-FFFF Data - Channel 5
40055 Channel 6 Data R 0-FFFF Data - Channel 6

R 0-06FF Bits 0-7

The counter increments each conversion and
rolled over after FF. The Conversion Counter
indicates when the data registers have been
updated.
Bits 8-10
Input channel last conversion stored. The
information is useful when all channel data is
read back with 1 query. The user can identify
which channels have been converted since
the last query as long as the time between
queries is less than 8 conversion times.
Initialized to ‘0x0000’ on device reset.

16

40095 Misc. Setup R/W 0-1 Bit 0 – Normal Mode Rejection Setting

0 – 60Hz, 25 Hz Conversion Speed.
1 – 50Hz, 20 Hz Conversion Speed.

Factory set to 0x0000.

40096 Signal Filtering R/W 0-3F This register controls all channels. Time

constants are only approximate values.
Bits 0-3 Small Filter Time Constant(Secs)
0 0
1 0.5
2 1
3 2
4 4
5 8
6 16
7 32

Bits 4-7 Large Filter Time Constant(Secs)
0 0
1 0.5
2 1
3 2
4-7 Reserved

Factory set to 0x0000.

40097 Setup Channel 0 R/W 0-F Channel 0 range. Non-volatile write

protected register. If the EEPROM cannot be
written because of not being enabled, it
replies with a Negative Acknowledge
Exception response 07h. Modbus function
code 10h is limited to 4 data values.

Range: Bits 0-7 Hex
Disable Channel 00
+/-10V 01
+/-5V 02
+/-1V 03
+/-0.100V 04
+/-0.050V 05
+/-0.025V 06

Factory set to 0x0001.

40098 Setup Channel 1 R/W 0-F Holds Channel 1 range.

Factory set to 0x0001.

40099 Setup Channel 2 R/W 0-F Holds Channel 2 range.

Factory set to 0x0001.

40100 Setup Channel 3 R/W 0-F Holds Channel 3 range.

Factory set to 0x0001.

40101 Setup Channel 4 R/W 0-F Holds Channel 4 range.

Factory set to 0x0001.

40102 Setup Channel 5 R/W 0-F Holds Channel 5 range.

Factory set to 0x0001.

40103 Setup Channel 6 R/W 0-F Holds Channel 6 range.

Factory set to 0x0001.

40114 Trim Zero, 10V

Range

40115 Trim Zero, 5V

Range

40116 Trim Zero, 1V

Range

WP 0 Forces all Channel Data Registers to 8000h,

with input signal equal to zero. Apply
calibration signal at least 15 seconds prior to
calibrating to all channels. Calibration
Acknowledge Exception Response.
Calibration takes 20 seconds.

WP 0 Refer to Modbus register 40114.
WP 0 Refer to Modbus register 40114.

17

40117 Trim Zero, 0.1V

Range

40118 Trim Zero, 0.05V

Range

40119 Trim Zero,

0.025V Range

40146 Trim FS, 10V

Range

40147 Trim FS, 5V

Range

40148 Trim FS, 1V

Range

40149 Trim FS, 0.1V

Range

40150 Trim FS, 0.05V

Range

40151 Trim FS, 0.025V

Range

40241 Control Register

Functions:

R Read Only
R/W Read/Write
WP Write-Protected

WP 0 Refer to Modbus register 40114. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.

WP 0 Refer to Modbus register 40114. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.

WP 0 Refer to Modbus register 40114. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

W

Forces all Channel Data Registers to written
value, with appropriate input signal. Apply
calibration signal at least 15 seconds prior to
calibrating to all channels. Acknowledge
Exception Response. Calibration takes 20
seconds. See note 1.
See Modbus Register 40146.

See Modbus Register 40146.
See Modbus Register 40146. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.
See Modbus Register 40146. Apply
calibration signal at least 1 minute prior to
calibrating to all channels.
See Modbus Register 40146. Apply
calibration signal at least 1 minute prior to
calibrating to all channels.

0 – Normal operation (NOP)
1 – Remote Reset (write protected)
2 – Write Enable
5 – Initialize Host Communication setup

18

4.1.5 Seven Channel Voltage Input Module Calibration Procedure
Required Equipment:

1. Computer running the D6000 Utility Software or another Modbus Master program.

2. A NIST traceable DC Voltage Standard with +/-10Vdc range.

Setup Steps – Perform Calibration Steps in Order Listed:

1. Allow unit to warm up for 15 minutes.

2. Short all the +Input pins together using short jumper wires.

3. Short all the -Input pins together using short jumper wires.

4. Connect the +Input wires to the Positive terminal on the DC voltage calibrator.

5. Connect the -Input wires to the Negative terminal on the DC voltage calibrator.

6. Install the D6000 Utility Software or another Modbus Master Program to communicate
with, and calibrate with the module via serial port or a TCP/IP connection.

Trim Zero:

1. Set the DC calibrator voltage output to +0.0000Vdc.

2. Use the D6000 Utility Software or a Modbus Master program to perform steps #3 & #5.

3. Set all channels to the same range. Start with +/-10Vdc range, work downward as per
values in Table 1.0.

4. Trim Zero on all channels.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Retrieve Trim Zero register value for specific range from Table 2.0 below.
c. Write value of 0x00h to Range Trim Zero register, (ie. 40114 for +/-10V).
d. Perform steps #4a through #4c to trim zero on each range.

Trim Span:

1. Set the DC calibrator voltage output to +10.000Vdc.

2. Use the D6000 Utility Software or a Modbus Master program to perform steps #3 & #5.

3. Set all channels to the same range. Start with +/-0.025Vdc range, work upward as per
values in Table 3.0.

4. Trim Span on each channel.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Retrieve Trim Span register value for specific range from Table 2.0 below.
c. Write value of 0xfffe to Trim Span register, (ie. 40146 for +/-10V).
d. Perform steps #4a through #4c to trim span on each range.

19

4.1.6 Seven Channel Voltage Input Calibration Tables:

Seven Channel Range Register Values

Channel Range Control Range Values

Channel 0 40097
Channel 1 40098
Channel 2 40099
Channel 3 40100
Channel 4 40101
Channel 5 40102
Channel 6 40103

Table 1.0 Register Setup Values.

00 Disabled
01 +/-10V
02 +/-5V
03 +/-1V
04 +/-0.1V
05 +/-0.05V
06 +/-0.025V

Trim Zero Registers and Calibration Values

Range Register Value

+/-10Vdc 40114 0000

+/-5Vdc 40115 0000
+/-1Vdc 40116 0000

+/-0.1Vdc 40117 0000

+/-0.05Vdc 40118 0000

+/-0.025Vdc 40119 0000

Table 2.0 Trim Zero Registers and Values.

Trim Span Registers and Calibration Values

Range Register Value

+/-0.025Vdc 40151 FFFE

+/-0.05Vdc 40150 FFFE

+/-0.1Vdc 40149 FFFE

+/-1Vdc 40148 FFFE
+/-5Vdc 40147 FFFE

+/-10Vdc 40146 FFFE

Table 3.0 Trim Span Registers and Values.

20

4.2 D6200 - Seven Channel Current Input Module

Overview

The D6200 series analog input module contains seven differential analog inputs for measuring
current signals such as 4-20mA loops. Each analog input channel can measure current signals
up to +/-20mA. Any unused channels can be disabled.

Analog to Digital Converter

The D6200 series analog input modules contain a 16-bit analog to digital converter to perform the
signal conversion to digital information. The analog to digital converter performs a total of 25
conversions per second. Meaning, if all 7 channels were enabled the each channel would be
measured 3+ times per second. The conversion rate per channel can be improved by disabling
any unused channels.

Features and Register Assignments

The D6200 series analog input modules contain many user-selectable features. The user can
select all features such as baud rate, parity type, analog range selection and digital filtering. The
complete list of features is illustrated in the “Seven Channel Analog Current Input Register

Assignments” register map below. The register map format is used for consistency with the

Modbus RTU protocol. The register map contains the register numbers in decimal format, register
description, acceptable data values, and list of what each value means. These registers can be
written to using most any Modbus master program or using the D6000 series utility software.

Note: All Modbus Register values in the tables below are represented as “decimal” numbers.

Factory Initial Values

The D6200 series analog module features are initialized at the factory with a set of “Initial
Values”. A complete list of factory “Initial Values” can be found in the table below. For reference
purposes, the Modbus Slave address is preset to hex 0x01, the baud rate is 9600, Parity type is
None and the Stop Bits is “1”.

Calibration

The D6200 series analog input modules are shipped from the factory as fully calibrated devices.
Throughout the lifetime of the module there may be need to verify or adjust the calibration of the
device. The verification and adjustment process should only be completed using NIST traceable
calibration equipment. A D6200 series Calibration procedure is included below.

Connector Pin Designations

The D6200 series module uses two 3.81mm removable plugs for connecting signals to the
module. One six-pin connector is for the power supply and the host RS-485 data line
connections. A second sixteen-pin connector is used to connect analog input signals to the
module. The pin designations for each connector are printed on the module label and are listed in
a table below.

21

4.2.2 Seven Channel Current Input Specifications

Connections
Power & Serial Communications

Pin Number Pin Designator
1 GND - Power Supply
2 +VS + Power Supply
3 DATA- RS-485 Data­ 4 DATA+ RS-485 Data+
5 Default* Default*
6 GND - Power Supply

Analog Input Pin Assignments

Pin Number Pin Designator
1 CH1+ CH1 +Input
2 CH1- CH1 -Input
3 CH2+ CH2 +Input
4 CH2- CH2 -Input
5 CH3+ CH3 +Input
6 CH3- CH3 -Input
7 CH4+ CH4 +Input
8 CH4- CH4 -Input
9 CH5+ CH5 +Input
10 CH5- CH5 -Input
11 CH6+ CH6 +Input
12 CH6- CH6 -Input
13 CH7+ CH7 +Input
14 CH7- CH7 -Input
15 ISO. GND Isolated GND
16 ISO. GND Isolated GND

Specifications

Analog Inputs 7 Channels
Input Range

Current +/-20mA
Differential Reading

CH to CH +/-10Vdc
Protocol

Serial Modbus RTU
Power Supply

Voltage +10-30Vdc
Power 1.4W

Connectors
Spacing 3.81mm
Max Wire Size 14-24 AWG
Max Current 8 Amperes

Serial LED Displays
Transmit (Top) TxData
Receive (Bottom) RxData

22

4.2.3 Seven Channel Current Input Module Initial Values

Module Parameter Value

Slave Address 1
Baud Rate 9600
Parity Type None
Modbus Response Delay 3mS
Modbus Query Delay 0mS
Conversion Rate 60Hz
Large Signal Filter 0 Seconds
Small Signal Filter 0 Seconds
Channel 0 Range +/-20mA
Channel 1 Range +/-20mA
Channel 2 Range +/-20mA
Channel 3 Range +/-20mA
Channel 4 Range +/-20mA
Channel 5 Range +/-20mA
Channel 6 Range +/-20mA

23

4.2.4 Seven Channel Current Input Register Assignments

Register Description Functions Value Description

40001 Slave Address R/W 1-DF Factory set to 0x0001.
40002 UART Setup R/W Bits 0-4 Baud Rate

5=9600
6=19.2K
7=38.4K
8=57.6K
9=115.2K

Bits 5-6 Parity
0=No Parity, 8-N-2
1=Odd
2=Even
3=No Parity, 8-N-1

Factory set to 0x0035 = 9600, 8, N, 1.

40003 Modbus Delays R/W 0-303F Bits 0-7

The Response Delay in milliseconds. This is
required when the RS-485 adapter cannot
tri-state immediately after the last character
is transmitted from the host. Maximum value
is 63mS. Factory default value is 3.

Bits 8-15
The End of Query Delay in milliseconds
(48mS max). This is an additional time that
the module will wait prior to marking the end
of the message. Slower host computers may
not be able transmit a continuous message
stream, thereby creating gaps between
characters exceeding the normal 3.5
character times limit. Factory default value is

0.

Factory set, 0x0003.

40033 Software Version R Factory set, Code Version.
40048 Last Converted

Chan,
Conversion
Counter

40049 Channel 0 Data R 0-FFFF Data - Ch 0, Offset binary, zero=0x8000.
40050 Channel 1 Data R 0-FFFF Data - Channel 1
40051 Channel 2 Data R 0-FFFF Data - Channel 2
40052 Channel 3 Data R 0-FFFF Data - Channel 3
40053 Channel 4 Data R 0-FFFF Data - Channel 4
40054 Channel 5 Data R 0-FFFF Data - Channel 5
40055 Channel 6 Data R 0-FFFF Data - Channel 6

R 0-06FF Bits 0-7

The counter increments each conversion and
rolled over after FF. The Conversion Counter
indicates when the data registers have been
updated.
Bits 8-10
Input channel last conversion stored. The
information is useful when all channel data is
read back with 1 query. The user can identify
which channels have been converted since
the last query as long as the time between
queries is less than 8 conversion times.
Initialized to ‘0x0000’ on device reset.

24

40095 Misc. Setup R/W 0-1 Bit 0 – Normal Mode Rejection Setting

0 – 60Hz, 25 Hz Conversion Speed.
1 – 50Hz, 20 Hz Conversion Speed.

Factory set to 0x0000.

40096 Signal Filtering R/W 0-3F This register controls all channels. Time

constants are only approximate values.
Bits 0-3 Small Filter Time Constant(Secs)
1 0
1 0.5
2 1
3 2
4 4
5 8
6 16
7 32

Bits 4-7 Large Filter Time Constant(Secs)
0 0
1 0.5
2 1
3 2
4-7 Reserved

Factory set to 0x0000.

40097 Setup Channel 0 R/W 0-F Channel 0 range. Non-volatile write

protected register. If the EEPROM cannot be
written because of not being enabled, it
replies with a Negative Acknowledge
Exception response 07h. Modbus function
code 10h is limited to 4 data values.

Range: Bits 0-7 Hex
Disable Channel 00
+/-20mA 03

Factory set to 0x0003.

40098 Setup Channel 1 R/W 0-F Holds Channel 1 range.

Factory set to 0x0003.

40099 Setup Channel 2 R/W 0-F Holds Channel 2 range.

Factory set to 0x0003.

40100 Setup Channel 3 R/W 0-F Holds Channel 3 range.

Factory set to 0x0003.

40101 Setup Channel 4 R/W 0-F Holds Channel 4 range.

Factory set to 0x0003.

40102 Setup Channel 5 R/W 0-F Holds Channel 5 range.

Factory set to 0x0003.

40103 Setup Channel 6 R/W 0-F Holds Channel 6 range.

Factory set to 0x0003.

40116 Trim Zero,

+/-20mA Range

40148 Trim FS,

+/-20mA Range

40241 Control Register

Functions:

R Read Only
R/W Read/Write
WP Write-Protected

WP 0 Force all channel data to 0x8000, input

signal = 0. Wait 15 Secs, Write 0x0000.

WP D000-

FFFE

W

Force all channel data to top of range, Wait
15 Sec, Write value (0xfffe if +F.S.).

0 – Normal operation (NOP)
1 – Remote Reset (write protected)
2 – Write Enable
5 – Initialize Host Communication setup

25

4.2.5 Seven Channel Current Input Calibration Procedure

Required Equipment:

1. Computer running the D6000 Utility Software or another Modbus Master program.

2. A NIST traceable DC Current Standard with +/-20mA range.

Setup Steps – Perform Calibration Steps in Order Listed:

1. Allow unit to warm up for 15 minutes.

2. Connect the positive lead of DC current calibrator to Ch1 +Input terminal.

3. Connect the Ch1 –Input terminal the Ch2 +Input terminal.

4. Connect the Ch2 –Input terminal the Ch3 +Input terminal.

5. Connect the Ch3 –Input terminal the Ch4 +Input terminal.

6. Connect the Ch4 –Input terminal the Ch5 +Input terminal.

7. Connect the Ch5 –Input terminal the Ch6 +Input terminal.

8. Connect the Ch6 –Input terminal the Ch7 +Input terminal.

9. Connect the negative lead of the DC current calibrator to Ch7 –Input terminal.

10. Install the D6000 Utility Software or another Modbus Master Program to communicate
with, and calibrate with the module via serial port or a TCP/IP connection.

11. Using the D6000 Utility Software configure all channels for the +/-20mA range using the
data values in Table 1.0 below.

Trim Zero:

1. Set the DC calibrator current output to +0.00mA. Wait 30 seconds.

2. Trim Zero on all channels.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Trim Zero on all seven channels by writing a value of 0x0000h to Trim Zero

register 40116. See Table 2.0 below.

Trim Span:

1. Set the DC calibrator current output to +20.000mA. Wait 30 seconds.

2. Trim Span on all channels.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Trim Span on all seven channels by writing a value of 0xfffe to Trim Span register

40148. See Table 3.0 below.

26

4.2.6 Seven Channel Current Input Calibration Tables:

Seven Channel Current Register Values

Channel Range Control Range Values

Channel 0 40097
Channel 1 40098
Channel 2 40099
Channel 3 40100
Channel 4 40101
Channel 5 40102
Channel 6 40103

Table 1.0 Register Setup Values.

0 = Disabled
3 = +/-20mA

Trim Zero Register and Calibration Value

Range Register

+/-20mA 40116 0000

Table 2.0 Trim Zero Register and Value.

Value

Trim Span Register and Calibration Value

Range Register

+/-20mA 40148 FFFE

Table 3.0 Trim Span Register and Value.

Value

27

4.3 D6300 - Seven Channel Thermocouple Input Module

Overview

The D6300 series analog input module contains seven differential inputs for measuring
thermocouple signals. Each analog input channel is user programmable and may be assigned to
measure one of 8 different thermocouple types. The D6300 can measure thermocouple types J,
K, T, E, R, S, B and C. Any unused channels can be disabled.

Analog to Digital Converter

The D6300 series analog input modules contain a 16-bit analog to digital converter to perform the
signal conversion to digital information. The analog to digital converter performs a total of 25
conversions per second. Meaning, if all 7 channels were enabled the each channel would be
measured 3+ times per second. The conversion rate per channel can be improved by disabling
any unused channels.

Features and Register Assignments

The D6300 series analog input modules contain many user-selectable features. The user can
select all features such as baud rate, parity type, analog range selection and digital filtering. The
complete list of features is illustrated in the “Seven Channel Analog Thermocouple Input Register

Assignments” register map below. The register map format is used for consistency with the

Modbus RTU protocol. The register map contains the register numbers in decimal format, register
description, acceptable data values, and list of what each value means. These registers can be
written to using most any Modbus master program or using the D6000 series utility software.

Note: All Modbus Register values in the tables below are represented as “decimal” numbers.

Factory Initial Values

The D6300 series analog module features are initialized at the factory with a set of “Initial
Values”. A complete list of factory “Initial Values” can be found in the table below. For reference
purposes, the Modbus Slave address is preset to hex 0x01, the baud rate is 9600, Parity type is
None and the Stop Bits is “1”.

Calibration

The D6300 series analog input modules are shipped from the factory as fully calibrated devices.
Throughout the lifetime of the module there may be need to verify or adjust the calibration of the
device. The verification and adjustment process should only be completed using NIST traceable
calibration equipment. A D6300 series Calibration procedure is included below.

Connector Pin Designations

The D6300 series module uses two 3.81mm removable plugs for connecting signals to the
module. One six-pin connector is for the power supply and the host RS-485 data line
connections. A second sixteen-pin connector is used to connect analog input signals to the
module. The pin designations for each connector are printed on the module label and are listed in
a table below.

28

4.3.2 Seven Channel Thermocouple Input Specifications

Connections
Power & Serial Communications

Pin Number Pin Designator
1 GND - Power Supply
2 +VS + Power Supply
3 DATA- RS-485 Data­ 4 DATA+ RS-485 Data+
5 Default* Default*
6 GND - Power Supply

Analog Input Pin Assignments

Pin Number Pin Designator
1 CH1+ CH1 +Input
2 CH1- CH1 -Input
3 CH2+ CH2 +Input
4 CH2- CH2 -Input
5 CH3+ CH3 +Input
6 CH3- CH3 -Input
7 CH4+ CH4 +Input
8 CH4- CH4 -Input
9 CH5+ CH5 +Input
10 CH5- CH5 -Input
11 CH6+ CH6 +Input
12 CH6- CH6 -Input
13 CH7+ CH7 +Input
14 CH7- CH7 -Input
15 ISO. GND Isolated GND
16 ISO. GND Isolated GND

Specifications

Analog Inputs 7 Channels
Input Type

Thermocouple J,K,T,E,R,S,B,C
Differential Reading

CH to CH +/-10Vdc
Protocol

Serial Modbus RTU
Power Supply

Voltage +10-30Vdc
Power 1.4W

Connectors
Spacing 3.81mm
Max Wire Size 14-24 AWG
Max Current 8 Amperes

Serial LED Displays
Transmit (Top) TxData
Receive (Bottom) RxData

29

4.3.3 Seven Channel Thermocouple Input Module Initial Values

Module Parameter Value

Slave Address 1
Baud Rate 9600
Parity Type None
Modbus Response Delay 3mS
Modbus Query Delay 0mS
Conversion Rate 60Hz
Large Signal Filter 0 Seconds
Small Signal Filter 0 Seconds
Channel 0 Range J-Tc Type
Channel 1 Range J-Tc Type
Channel 2 Range J-Tc Type
Channel 3 Range J-Tc Type
Channel 4 Range J-Tc Type
Channel 5 Range J-Tc Type
Channel 6 Range J-Tc Type

30

4.3.4 Seven Channel Thermocouple Input Register Assignments

Register Description Functions Value Description

40001 Slave Address R/W 1-DF Factory set to 0x0001.
40002 UART Setup R/W Bits 0-4 Baud Rate

5=9600
6=19.2K
7=38.4K
8=57.6K
9=115.2K

Bits 5-6 Parity
0=No Parity, 8-N-2
1=Odd
2=Even
3=No Parity, 8-N-1

Factory set to 0x0035 = 9600, 8, N, 1.

40003 Modbus Delays R/W 0-303F Bits 0-7

The Response Delay in milliseconds. This is
required when the RS-485 adapter cannot
tri-state immediately after the last character
is transmitted from the host. Maximum value
is 63mS. Factory default value is 3.

Bits 8-15
The End of Query Delay in milliseconds
(48mS max). This is an additional time that
the module will wait prior to marking the end
of the message. Slower host computers may
not be able transmit a continuous message
stream, thereby creating gaps between
characters exceeding the normal 3.5
character times limit. Factory default value is

0.

Factory set, 0x0003.

40033 Software Version R Factory set, Code Version.
40048 Last Converted

Chan,
Conversion
Counter

40049 Channel 0 Data R 0-FFFF Data - Ch 0, Offset binary, zero=0x8000.
40050 Channel 1 Data R 0-FFFF Data - Channel 1
40051 Channel 2 Data R 0-FFFF Data - Channel 2
40052 Channel 3 Data R 0-FFFF Data - Channel 3
40053 Channel 4 Data R 0-FFFF Data - Channel 4
40054 Channel 5 Data R 0-FFFF Data - Channel 5
40055 Channel 6 Data R 0-FFFF Data - Channel 6

R 0-06FF Bits 0-7

The counter increments each conversion and
rolled over after FF. The Conversion Counter
indicates when the data registers have been
updated.
Bits 8-10
Input channel last conversion stored. The
information is useful when all channel data is
read back with 1 query. The user can identify
which channels have been converted since
the last query as long as the time between
queries is less than 8 conversion times.
Initialized to ‘0x0000’ on device reset.

31

40095 Misc. Setup R/W 0-1 Bit 0 – Normal Mode Rejection Setting

0 – 60Hz, 25 Hz Conversion Speed.
1 – 50Hz, 20 Hz Conversion Speed.

Factory set to 0x0000.

40096 Signal Filtering R/W 0-3F This register controls all channels. Time

constants are only approximate values.
Bits 0-3 Small Filter Time Constant(Secs)
2 0
1 0.5
2 1
3 2
4 4
5 8
6 16
7 32

Bits 4-7 Large Filter Time Constant(Secs)
0 0
1 0.5
2 1
3 2
4-7 Reserved

Factory set to 0x0000.

40097 Setup Channel 0 R/W 0-F Channel 0 range. Non-volatile write

protected register. If the EEPROM cannot be
written because of not being enabled, it
replies with a Negative Acknowledge
Exception response 07h. Modbus function
code 10h is limited to 4 data values.

Range: Bits 0-7 Hex
Disable Channel 00
J-Tc (-200-760C) 21
K-Tc (-150-1250C) 22
T-Tc (-200-400C) 23
E-Tc (-100-1000C) 24
R-Tc (+0-1750C) 25
S-Tc (+0-1750C) 26
B-Tc (+0-1820C) 27
C-Tc (+0-2315C) 28

Factory set to 0x0003.

40098 Setup Channel 1 R/W 0-F Holds Channel 1 range.

Factory set to 0x0003.

40099 Setup Channel 2 R/W 0-F Holds Channel 2 range.

Factory set to 0x0003.

40100 Setup Channel 3 R/W 0-F Holds Channel 3 range.

Factory set to 0x0003.

40101 Setup Channel 4 R/W 0-F Holds Channel 4 range.

Factory set to 0x0003.

40102 Setup Channel 5 R/W 0-F Holds Channel 5 range.

Factory set to 0x0003.

40103 Setup Channel 6 R/W 0-F Holds Channel 6 range.

Factory set to 0x0003.

40116 Trim Zero,

+/-20mA Range

40148 Trim FS,

+/-20mA Range

40241 Control Register

WP 0 Force all channel data to 0x8000, input

signal = 0. Wait 15 Secs, Write 0x0000.

WP D000-

FFFE

W

Force all channel data to top of range, Wait
15 Sec, Write value (0xfffe if +F.S.).

0 – Normal operation (NOP)
1 – Remote Reset (write protected)
2 – Write Enable
5 – Initialize Host Communication setup

32

4.3.5 Seven Channel Thermocouple Input Calibration Procedure

Required Equipment:

1. Computer running the D6000 Utility Software or another Modbus Master program.

2. A NIST traceable DC Voltage Standard.

Setup Steps – Perform Calibration Steps in Order Listed:

1. Allow unit to warm up for 15 minutes.

2. Connect the positive lead of DC current calibrator to Ch1 +Input terminal.

3. Connect the Ch1 –Input terminal the Ch2 +Input terminal.

4. Connect the Ch2 –Input terminal the Ch3 +Input terminal.

5. Connect the Ch3 –Input terminal the Ch4 +Input terminal.

6. Connect the Ch4 –Input terminal the Ch5 +Input terminal.

7. Connect the Ch5 –Input terminal the Ch6+Input terminal.

8. Connect the Ch6 –Input terminal the Ch7 +Input terminal.

9. Connect the negative lead of the DC current calibrator to Ch7 –Input terminal.

10. Install the D6000 Utility Software or another Modbus Master Program to communicate
with, and calibrate with the module via serial port or a TCP/IP connection.

11. Using the D6000 Utility Software configure all channels for the +/-20mA range using the
data values in Table 1.0 below.

Trim Zero:

1. Set the DC calibrator current output to +0.00mV. Wait 30 seconds.

2. Trim Zero on all channels.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Trim Zero on all seven channels by writing a value of 0x0000h to Trim Zero

register 40116. See Table 2.0 below.

Trim Span:

1. Set the DC calibrator current output to +20.000mA. Wait 30 seconds.

2. Trim Span on all channels.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.

b.

Trim Span on all seven channels by writing a value of 0xfffe to Trim Span register

40148. See Table 3.0 below.

Trim CJC’s:

1. Set the input signal to -----.

2. Set all module channels to the J-Thermocouple range.

3. Use the D6000 Utility Software or a Modbus Master program to perform steps #4 & #5.

4. Trim Zero on each input channel

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Write a value of 0x0000h to register 40114.

5. Apply input signal to each channel from Table x.xx.

a. Wait 1 minute.
b. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
c. Write a value of 0xfffe

33

Trim Thermocouples:

1. Set the input signal to -----.

2. Set all module channels to the J-Thermocouple range.

3. Use the D6000 Utility Software or a Modbus Master program to perform steps #4 & #5.

4. Trim Zero on each input channel

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Write a value of 0x0000h to register 40114.

5. Apply input signal to each channel from Table x.xx.

a. Wait 1 minute.
b. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
c. Write a value of 0xfffe

34

4.3.5 Seven Channel Thermocouple Input Calibration Tables:

Seven Channel Range Register Values

Channel Range Control Range Values

Channel 0 40097
Channel 1 40098
Channel 2 40099
Channel 3 40100
Channel 4 40101
Channel 5 40102
Channel 6 40103

Table 1.0 Register Setup Values.

00 Disabled
04 +/-0.1V
05 +/-0.05V
06 +/-0.025V
21 J-Type TC
22 K-Type TC
23 T-Type TC
24 E-Type TC
25 R-Type TC
26 S-Type TC
27 B-Type TC
28 C-Type TC

Trim Zero Registers and Calibration Values

Range Register Value

+/-10Vdc 40114 0000

+/-5Vdc 40115 0000
+/-1Vdc 40116 0000

+/-0.1Vdc 40117 0000

+/-0.05Vdc 40118 0000

+/-0.025Vdc 40119 0000

Table 2.0 Trim Zero Registers and Values.

Trim Span Registers and Calibration Values

Range Register Value

+/-0.025Vdc 40151 FFFE

+/-0.05Vdc 40150 FFFE

+/-0.1Vdc 40149 FFFE

+/-1Vdc 40148 FFFE
+/-5Vdc 40147 FFFE

+/-10Vdc 40146 FFFE

Table 3.0 Trim Span Registers and Values.

CJC Calibration Registers and Values

Channels Register Increase Value Decrease Value

0..3 40129 0001 0000

4..6 40130 0001 0000

Table 4.0 Trim CJC Registers and Values.

35

4.4 D6400 - Seven Channel Voltage, Thermocouple, Current Input Module

Overview

The D6400 series analog input module contains seven analog inputs for measuring voltages,
thermocouples and current. Each analog input channel is user programmable and may be
assigned to different input types.

When measuring voltages or thermocouples, simply use the Utility Software to select the type of
signal and range. When configuring any channel to measure current loops or 4-20mA signals
then the Input range can be set to either the +/-1Vdc or +/-20mA selections. The module uses the
+/-1Vdc range to measure current up to 20mA.

When measuring current signals then a measurement sense resistor must be enabled via
jumpers inside the module. Each channel has a jumper strip that must be shorted using a
provided shorting bar to enable the sense resistor. The sense resistor is internally connected
directly across the channel+ and channel- input pins. See the D6400 board layout below for
instructions on taking the module and enabling the jumpers.

Analog to Digital Converter

The D6400 series analog input modules contain a 16-bit analog to digital converter to perform the
signal conversion to digital information. The analog to digital converter performs a total of 25
conversions per second. Meaning, if all 7 channels were enabled the each channel would be
measured 3+ times per second. The conversion rate per channel can be improved by disabling
any unused channels.

Features and Register Assignments

The D6400 series analog input modules contain many user-selectable features. The user can
select all features such as baud rate, parity type, analog range selection and digital filtering. The
complete list of features is illustrated in the “Seven Channel Voltage, Thermocouple and Current

Input Register Assignments” register map below. The register map format is used for consistency

with the Modbus RTU protocol. The register map contains the register numbers in decimal format,
register description, acceptable data values, and list of what each value means. These registers
can be written to using most any Modbus master program or using the D6000 series utility
software.

Note: All Modbus Register values in the tables below are represented as “decimal” numbers.

Factory Initial Values

The D6400 series analog module features are initialized at the factory with a set of “Initial
Values”. A complete list of factory “Initial Values” can be found in the table below. For reference
purposes, the Modbus Slave address is preset to hex 0x01, the baud rate is 9600, Parity type is
None and the Stop Bits is “1”.

Calibration

The D6400 series analog input modules are shipped from the factory as fully calibrated devices.
Throughout the lifetime of the module there may be need to verify or adjust the calibration of the
device. The verification and adjustment process should only be completed using NIST traceable
calibration equipment. A D6400 series Calibration procedure is included below.

Connector Pin Designations

The D6400 series module uses two 3.81mm removable plugs for connecting signals to the
module. One six-pin connector is for the power supply and the host RS-485 data line
connections. A second sixteen-pin connector is used to connect analog input signals to the
module. The pin designations for each connector are printed on the module label and are listed in
a table below.

36

4.4.1 Seven Channel Voltage, Thermocouple, Current Input Pin Assignments and
Specifications

Connections
Power & Serial Communications

Pin Number Pin Designator
1 GND - Power Supply
2 +VS + Power Supply
3 Data- RS-485 Data­ 4 Data+ RS-485 Data+
5 Default* Default*
6 GND - Power Supply

Analog Input Pin Assignments

Pin Number Pin Designator
1 CH1+ CH1 +Input
2 CH1- CH1 -Input
3 CH2+ CH2 +Input
4 CH2- CH2 -Input
5 CH3+ CH3 +Input
6 CH3- CH3 -Input
7 CH4+ CH4 +Input
8 CH4- CH4 -Input
9 CH5+ CH5 +Input
10 CH5- CH5 -Input
11 CH6+ CH6 +Input
12 CH6- CH6 -Input
13 CH7+ CH7 +Input
14 CH7- CH7 -Input
15 ISO. GND Isolated GND
16 ISO. GND Isolated GND

Specifications

Analog Inputs 7 Channels
User Selectable Input Ranges

Bipolar Voltage 10V, 5V, 1V,

0.1V, 0.05V,

0.025V
Thermocouple J,K,T,E,R,S,B,C
Current +/-20mA

Differential Reading
CH to CH

Protocol
Serial Modbus RTU

Power Supply
Voltage +10-30Vdc
Power 1.4W

Connectors
Spacing 3.81mm
Max Wire Size 14-24 AWG
Max Current 8 Amperes

Serial LED Displays
Transmit (Top) Serial TxData
Receive (Bottom) Serial RxData

37

4.4.2 Seven Channel Voltage, Thermocouple and Current Input Initial Values

Module Parameter Value

Slave Address 1
Baud Rate 9600
Parity Type None
Modbus Response Delay 3mS
Modbus Query Delay 0mS
Conversion Rate 60Hz
Large Signal Filter 0 Seconds
Small Signal Filter 0 Seconds
Channel 1 Range +/-10Vdc
Channel 2 Range +/-10Vdc
Channel 3 Range +/-10Vdc
Channel 4 Range +/-10Vdc
Channel 5 Range +/-10Vdc
Channel 6 Range +/-10Vdc
Channel 7 Range +/-10Vdc

38

4.4.3 Seven Channel Voltage, Thermocouple and Current Input Register Assignments

Register Description Functions Value Description

40001 Slave Address R/W 1-DF Factory set to 0x0001.
40002 UART Setup R/W Bits 0-4 Baud Rate

5=9600
6=19.2K
7=38.4K
8=57.6K
9=115.2K

Bits 5-6 Parity
0=No Parity, 8-N-2
1=Odd
2=Even
3=No Parity, 8-N-1

Factory set to 0x0035 = 9600, 8, N, 1.

40003 Modbus Delays R/W 0-303F Bits 0-7

The Response Delay in milliseconds. This is
required when the RS-485 adapter cannot
tri-state immediately after the last character
is transmitted from the host. Maximum value
is 63mS. Factory default value is 3.

Bits 8-15
The End of Query Delay in milliseconds
(48mS max). This is an additional time that
the module will wait prior to marking the end
of the message. Slower host computers may
not be able transmit a continuous message
stream, thereby creating gaps between
characters exceeding the normal 3.5
character times limit. Factory default value is

0.

Factory set, 0x0003.

40033 Software Version R Factory set, Code Version.
40048 Last Converted

Chan,
Conversion
Counter

40049 Channel 1 Data R 0-FFFF Data - Ch 1, Offset binary, zero=0x8000.
40050 Channel 2 Data R 0-FFFF Data - Channel 2
40051 Channel 3 Data R 0-FFFF Data - Channel 3
40052 Channel 4 Data R 0-FFFF Data - Channel 4
40053 Channel 5 Data R 0-FFFF Data - Channel 5
40054 Channel 6 Data R 0-FFFF Data - Channel 6
40055 Channel 7 Data R 0-FFFF Data - Channel 7

R 0-06FF Bits 0-7

The counter increments each conversion and
rolled over after FF. The Conversion Counter
indicates when the data registers have been
updated.
Bits 8-10
Input channel last conversion stored. The
information is useful when all channel data is
read back with 1 query. The user can identify
which channels have been converted since
the last query as long as the time between
queries is less than 8 conversion times.
Initialized to ‘0x0000’ on device reset.

39

40095 Misc. Setup R/W 0-1 Bit 0 – Normal Mode Rejection Setting

with

input signal equal to zero. Apply

0 – 60Hz, 25 Hz Conversion Speed.
1 – 50Hz, 20 Hz Conversion Speed.

Factory set to 0x0000.

40096 Signal Filtering R/W 0-3F This register controls all channels. Time

constants are only approximate values.
Bits 0-3 Small Filter Time Constant(Secs)
3 0
1 0.5
2 1
3 2
4 4
5 8
6 16
7 32

Bits 4-7 Large Filter Time Constant(Secs)
0 0
1 0.5
2 1
3 2
4-7 Reserved

Factory set to 0x0000.

40097 Setup Channel 1 R/W 0-F Channel 1 range. Non-volatile write

protected register. If the EEPROM cannot be
written because of not being enabled, it
replies with a Negative Acknowledge
Exception response 07h. Modbus function
code 10h is limited to 4 data values.

Range: Bits 0-7 Hex
Disable Channel 00
+/-10V 01
+/-5V 02
+/-1V 03
+/-0.100V 04
+/-0.050V 05
+/-0.025V 06
J-Tc (-200-760C) 21
K-Tc (-150-1250C) 22
T-Tc (-200-400C) 23
E-Tc (-100-1000C) 24
R-Tc (+0-1750C) 25
S-Tc (+0-1750C) 26
B-Tc (+0-1820C) 27
C-Tc (+0-2315C) 28
+/-20mA Current 03 (Special)

Factory set to 0x0001.

40098 Setup Channel 2 R/W 0-F Holds Channel 2 range.

Factory set to 0x0001.

40099 Setup Channel 3 R/W 0-F Holds Channel 3 range.

Factory set to 0x0001.

40100 Setup Channel 4 R/W 0-F Holds Channel 4 range.

Factory set to 0x0001.

40101 Setup Channel 5 R/W 0-F Holds Channel 5 range.

Factory set to 0x0001.

40102 Setup Channel 6 R/W 0-F Holds Channel 6 range.

Factory set to 0x0001.

40103 Setup Channel 7 R/W 0-F Holds Channel 7 range.

Factory set to 0x0001.

40114 Trim Zero, 10V

Range

WP 0 Forces all Channel Data Registers to 8000h,

40

calibration signal at least 15 seconds prior to
calibrating to all channels. Calibration
Acknowledge Exception Response.
Calibration takes 20 seconds.

40115 Trim Zero, 5V

Range

40116 Trim Zero, 1V

Range

40117 Trim Zero, 0.1V

Range

40118 Trim Zero, 0.05V

Range

40119 Trim Zero, 0.025V

Range

40129 Trim CJC 0 WP 0-1 Pre-calibrate appropriate mV range. Attach

40130 Trim CJC 1 WP 0-1 Pre-calibrate appropriate mV range. Attach

40146 Trim FS, 10V

Range

40147 Trim FS, 5V

Range

40148 Trim FS, 1V

Range

40149 Trim FS, 0.1V

Range

40150 Trim FS, 0.05V

Range

40151 Trim FS, 0.025V

Range

40241 Control Register

Functions:

R Read Only
R/W Read/Write
WP Write-Protected

WP 0 Refer to Modbus register 40072.
WP 0 Refer to Modbus register 40072.
WP 0 Refer to Modbus register 40072. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.

WP 0 Refer to Modbus register 40072. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.

WP 0 Refer to Modbus register 40072. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.

thermocouple to channel 1, with
measurement end in ice bath. Writing a 1 will
increase Modbus TC output. Writing a 0 will
decrease Modbus TC output.
No Trim for R, S, B, C Types.

thermocouple to channel 5, with
measurement end in ice bath. Writing a 1 will
increase Modbus TC output. Writing a 0 will
decrease Modbus TC output.
No Trim for R, S, B, C Types.

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

WP D000-

FFFE

W

Forces all Channel Data Registers to written
value, with appropriate input signal. Apply
calibration signal at least 15 seconds prior to
calibrating to all channels. Acknowledge
Exception Response. Calibration takes 20
seconds. See note 1.
See Modbus Register 40146.

See Modbus Register 40146.
See Modbus Register 40146. Apply

calibration signal at least 1 minute prior to
calibrating to all channels.
See Modbus Register 40146. Apply
calibration signal at least 1 minute prior to
calibrating to all channels.
See Modbus Register 40146. Apply
calibration signal at least 1 minute prior to
calibrating to all channels.

0 – Normal operation (NOP)
1 – Remote Reset (write protected)
2 – Write Enable
5 – Initialize Host Communication setup

41

4.4.4 Seven Channel Voltage, Thermocouple and Current Input Calibration Procedure
Required Equipment:

1. Computer running the D6000 Utility Software or another Modbus Master program.

2. A NIST traceable DC Voltage Standard with +/-10Vdc range.

Setup Steps – Perform Calibration Steps in Order Listed:

1. Allow unit to warm up for 15 minutes.

2. Short all the +Input pins together using short jumper wires.

3. Short all the -Input pins together using short jumper wires.

4. Connect the +Input wires to the Positive terminal on the DC voltage calibrator.

5. Connect the -Input wires to the Negative terminal on the DC voltage calibrator.

6. Install the D6000 Utility Software or another Modbus Master Program to communicate
with, and calibrate with the module via serial port or a TCP/IP connection.

Trim Zero:

1. Set the DC calibrator voltage output to +0.0000Vdc.

2. Use the D6000 Utility Software or a Modbus Master program to perform steps #3 & #5.

3. Set all channels to the same range. Start with +/-10Vdc range, work downward as per
values in Table 1.0.

4. Trim Zero on all channels.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Retrieve Trim Zero register value for specific range from Table 2.0 below.
c. Write value of 0x00h to Range Trim Zero register, (ie. 40114 for +/-10V).
d. Perform steps #4a through #4c to trim zero on each range.

Trim Span:

1. Set the DC calibrator voltage output to +10.000Vdc.

2. Use the D6000 Utility Software or a Modbus Master program to perform steps #3 & #5.

3. Set all channels to the same range. Start with +/-0.025Vdc range, work upward as per
values in Table 3.0.

4. Trim Span on each channel.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Retrieve Trim Span register value for specific range from Table 2.0 below.
c. Write value of 0xfffe to Trim Span register, (ie. 40146 for +/-10V).
d. Perform steps #4a through #4c to trim span on each range.

Trim CJC’s:

1. Set the input signal to -----.

2. Set all module channels to the J-Thermocouple range.

3. Use the D6000 Utility Software or a Modbus Master program to perform steps #4 & #5.

4. Trim Zero on each input channel

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Write a value of 0x0000h to register 40114.

5. Apply input signal to each channel from Table x.xx.

a. Wait 1 minute.
b. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
c. Write a value of 0xfffe

42

Trim Thermocouples:

1. Set the input signal to -----.

2. Set all module channels to the J-Thermocouple range.

3. Use the D6000 Utility Software or a Modbus Master program to perform steps #4 & #5.

4. Trim Zero on each input channel

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Write a value of 0x0000h to register 40114.

5. Apply input signal to each channel from Table x.xx.

a. Wait 1 minute.
b. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
c. Write a value of 0xfffe

43

4.4.5 Seven Channel Voltage, Thermocouple and Current Input Calibration Tables:

Seven Channel Range Register Values

Channel Range Control Range Values

Channel 1 40097
Channel 2 40098
Channel 3 40099
Channel 4 40100
Channel 5 40101
Channel 6 40102
Channel 7 40103

Table 1.0 Register Setup Values.

00 Disabled
01 +/-10V
02 +/-5V
03 +/-1V
04 +/-0.1V
05 +/-0.05V
06 +/-0.025V
21 J-Type TC
22 K-Type TC
23 T-Type TC
24 E-Type TC
25 R-Type TC
26 S-Type TC
27 B-Type TC
28 C-Type TC

Trim Zero Registers and Calibration Values

Range Register Value

+/-10Vdc 40114 0000

+/-5Vdc 40115 0000
+/-1Vdc 40116 0000

+/-0.1Vdc 40117 0000

+/-0.05Vdc 40118 0000

+/-0.025Vdc 40119 0000

Table 2.0 Trim Zero Registers and Values.

Trim Span Registers and Calibration Values

Range Register Value

+/-0.025Vdc 40151 FFFE

+/-0.05Vdc 40150 FFFE

+/-0.1Vdc 40149 FFFE

+/-1Vdc 40148 FFFE
+/-5Vdc 40147 FFFE

+/-10Vdc 40146 FFFE

Table 3.0 Trim Span Registers and Values.

CJC Calibration Registers and Values

Channels Register Increase Value Decrease Value

0..3 40129 0001 0000

4..6 40130 0001 0000

Table 4.0 Trim CJC Registers and Values.

44

4.4.6 D6400 Current Channel Enable:
Overview

The following information details how to open the D6400 module and enable or disable current
channels.

Default from the Factory

No current enabling jumpers are installed at the factory. All channels are initialized as voltage
inputs.

Open the Module

Remove the top cover of the D6400 module by unscrewing the four screws on the top cover. With
the cover removed, locate J100, a storage strip that contains up to seven unused jumpers. Then
locate the CH1 through CH7 jumper strips that enable current channels.

Move the Jumpers

To enable any channel as a current input channel, simply move a jumper from J100 to the
specific channel jumper strip. To disable a current input channel, simply move the jumper from
the channel jumper strip back to J100. See the image below for the location of the pin strips
versus channels.

45

46

4.5 D6500 Two Channel Analog Output Module

Overview

The D6500 series analog output module contains two 12-bit analog outputs for controlling
process control devices. Each analog output signal can be configured as either a voltage or
current output. Two voltage ranges and two current ranges can be selected for maximum
flexibility to control many different process control devices.

Analog Outputs

The D6500 series analog outputs can be configured as either voltage outputs or current outputs.

Features and Register Assignments

The D6500 series modules contain many user-selectable features. The user can select all
features such as baud rate, parity type, power-on “safe” analog output value and communications
watchdog timer interval. The complete list of features is illustrated in the “Two Channel Analog

Output Register Assignments” register map below. The register map format is used for

consistency with the Modbus RTU protocol. The register map contains the register numbers in
decimal format, register description, acceptable data values, and list of what each value means.
These registers can be written to using most any Modbus master program or using the D6000
series utility software.

Note: All Modbus Register values in the tables below are represented as “decimal” numbers.

Factory Initial Values

The D6500 series analog output modules are initialized at the factory with a set of “Initial Values”.
A complete list of factory “Initial Values” can be found in the table below. For reference purposes,
the Modbus Slave address is preset to hex 0x01, the baud rate is 9600, Parity type is None and
the Stop Bits is “1”.

Communications Watchdog Timer

The D6500 series digital output module contains a user-programmable communications
watchdog timer. The communications watchdog timer can be used to force the analog output
signals to a known “safe” condition in the event that communications are lost to the module. The
known “safe” condition can be user-programmed into the module Initial Value register.

Connector Pin Designations

The D6500 series module uses two 3.81mm removable plugs for connecting signals to the
module. One six-pin connector is for the power supply and the host RS-485 data line
connections. A second eight-pin connector is used to connect analog output signals to control
devices. The pin designations for each connector are printed on the module label and are listed in
a table below.

47

4.5.1 Two Channel Analog Output Pin Assignments and Specifications

Connections
Power & Serial Communications

Pin Number Pin Designator
1 GND - Power Supply
2 +VS + Power Supply
3 Data- RS-485 Data­ 4 Data+ RS-485 Data+
5 Default* Default*
6 GND

Analog Output Pin Assignments

Pin Number Pin Designator
1 CH1 +I #1-+Current Out
2 CH1 -I #1- -Current Out
3 CH1 +V #1- +Voltage Out
4 CH1 -V #1- -Voltage Out
5 CH2 +I #2- +Current Out
6 CH2 -I #2- -Current Out
7 CH2 +V #2- +Voltage Out
8 CH2 -V #2- -Voltage Out

Notes:

1. Each channel can be used as either a

voltage output or a current output. But
not both at the same time.

2. When using a channel as a current
output there must be no connections on
+/-V Output pins.

Specifications

Analog Outputs 2 Channels
User Selectable Input Ranges

Voltage Ranges 0-10V,
Current Ranges 4-20mA,

Protocol
Serial Modbus RTU

Power Supply
Voltage +10-30Vdc
Power 2.1W

Connectors
Spacing 3.81mm
Max Wire Size 14-24 AWG
Max Current 8 Amperes

Serial LED Displays
Transmit (Top) Serial TxData
Receive (Bottom) Serial RxData

+/-10V,
0-20mA

48

4.5.2 Two Channel Analog Output Register Assignments

Register Description Functions Value Description

40001 Slave Address R/WP 1-DF
40002 UART Setup R/WP 5-9 Bits 0-4 Baud Rate

40003 Modbus Delays R/WP 0-303F Bits 0-7

40033 Software Version R
40049 Analog Out CH1 R/W 0-FFFF 0= -FS, FFFF= +FS, Set analog output,
40050 Analog Out Ch2 R/W 0-FFFF See Register 49.

40065 Slope CH1 R/W 0-12 On the fly slope. Reset default slope from

Factory set to 0x0001.
5=9600

6=19.2K
7=38.4K
8=57.6K
9=115.2K

Bits 5-6 Parity
0=No Parity, 8-N-2
1=Odd
2=Even
3=No Parity, 8-N-1
Factory set to 0x0035 = 9600, 8, N, 1.

The Response Delay in milliseconds.
This is required when the RS-485
adapter cannot tri-state immediately after
the last character is transmitted from the
host. Maximum value is 63mS. Factory
default value is 3.

Bits 8-15
The End of Query Delay in milliseconds
(48mS max). This is an additional time
that the module will wait prior to marking
the end of the message. Slower host
computers may not be able transmit a
continuous message stream, thereby
creating gaps between characters
exceeding the normal 3.5 character times
limit. Factory default value is 0.

Factory set to 0x0003.
Factory set from data value in source
code.

DAC value after slewing.

EEPROM.
0 – Immediate
1 – 0.156% Span/s
2 – 0.310
3 – 0.625
4 – 1.25
5 – 2.50
6 – 5
7 – 10
8 – 20
9 – 40
A – 80
B –160
C – 320
D – 640
E – 1280
F – 2560
10 – 5120
11 – 10240
12 – 20480

49

V/S=% Span/s (Span)/100
i.e. for slope= 10, 5120(10)/100=512V/S

Factory set to 0x0000.

40066 Slope CH2 R/W 0-

1FFFF
40097 ADC Read CH1 R 0-FFFF Readback CH1, 8 bit resolution.
40098 ADC Read CH2 R Readback CH2, 8 bit resolution.
40113 Present Output

CH1

40114 Present Output

CH2

40144 Watchdog Time-

out Interval

40145 Setup CH1 R/WP Holds Channel 1 range and slope setup.

40146 Initial Value CH1 R/WP 0-FFFF Power-Up or Reset analog output value.
40147 Setup CH2 R/WP Holds Channel 2 range and slope setup.

R 0-FFFF Normalized present DAC value. Present

R 0-FFFF Normalized present DAC value. Present

R/WP 0-FFFF The interval of time in seconds that must

On the fly slope.

Factory set to 0x0000.

Output may differ from Setpoint, if output
has not reached to its final value.

Output may differ from Setpoint, if output
has not reached to its final value.

lapse after the last communication to the
module or since power was applied,
before the Watchdog is triggered and the
outputs are set to the Initial Value.
Effective immediately. The purpose of the
Watchdog Timer is to force the analog
outputs to a known safe value in the
event of a host or communications link
failure. The Watchdog Timer may be
disabled, by setting the value to FFFF
Hex. Accuracy is 10%.
Factory set to 0xFFFF.

On the fly slope changed immediately.
Setup change is immediate.
Bits 0-2
0 – 0-10V
1 – +/-10V
2 – 4-20mA
3 – 0-20mA

Bits 3-7
0 – Immediate
1 – 0.156% Span/s
2 – 0.31
3 – 0.625
4 – 1.25
5 – 2.50
6 – 5
7 – 10
8 – 20
9 – 40
A – 80
B –160
C – 320
D – 640
E – 1280
F – 2560
10 – 5120
11 – 10240
12 – 20480
V/S=% Span/s (Span)/100
i.e. for slope= 10, 5120(10)/100=512V/S

Factory set to 0x0000.
Factory set to 0x0000.
Factory set to 0x0000.

50

40148 Initial Value CH2 R/WP 0-FFFF Power-Up or Reset analog output value.

Factory set to 0x0000.

40177 Increase Min

Output
Calibration

40178 Decrease Min

Output
Calibration

40179 Increase Max

Output
Calibration

40180 Decrease Max

Output
Calibration

40181 Trim ADC WP 0-1 Forces output of selected channel (data

40241 Control W

WP 0-1 Increases output of selected channel, by

1 LSB. Output must be previously set to
minimum value in table xx. Repeat as
needed get the desired output. The effect
is immediate.

Write 0 for Channel 1
Write 1 for Channel 2

WP 0-1 Decreases output of selected channel, by

1 LSB. Output must be previously set to
minimum value in table xx. Repeat as
needed to get desired output. The effect
is immediate.

Write 0 for Channel 1
Write 1 for Channel 2

WP 0-1 Increases output of selected channel, by

1 LSB. Output must be previously set to
maximum value in table xx. Repeat as
needed get the desired output. The effect
is immediate.

Write 0 for Channel 1
Write 1 for Channel 2

WP 0-1 Decreases output of selected channel, by

1 LSB. Output must be previously set to
maximum value in table xx. Repeat as
needed to get desired output. The effect
is immediate.

Write 0 for Channel 1
Write 1 for Channel 2

value) to minimum and maximum values
momentarily, and calibrates readback
ADC to coincide. Output is then restored
to original value when calibration is
completed. The effect is immediate.

0 – Normal operation (NOP)
1 – Remote Reset (write protected)
2 – Write Enable
5 – Initialize Host communications setup

Functions:

R Read Only
R/W Read/Write
WP Write-Protected

Notes:

1. Values written to Registers 40049 and 40050 must not be proceeded by a Write-Protect
command.

51

4.5.3 Two Channel Analog Output Initial Factory Values

Module Parameter Value

Slave Address 1
Baud Rate 9600
Parity Type None
Modbus Response Delay 3mS
Modbus Query Delay 0mS
Conversion Rate 60Hz
Channel 0 on the fly slope Immediate
Channel 1 on the fly slope Immediate
Watchdog Timer Low Word 0xffff, = Disabled
Channel 0 Range 0-10Vdc
Channel 0 Slope Immediate
Channel 0 Initial Value 0Vdc
Channel 1 Range 0-10Vdc
Channel 1 Slope Immediate
Channel 1 Initial Value 0Vdc

52

4.5.4 Analog Voltage Output Calibration Procedure

Required Equipment

1. Computer running the D6000 Utility Software or another Modbus Master program.

2. A NIST traceable Digital multimeter (DMM) with +/-10Vdc range.

Setup Steps – Perform Calibration Steps in Order Listed:

1. Allow unit to warm up for 15 minutes.

2. Connect positive (+) lead of the DMM to the Ch1+Vout terminal.

3. Connect negative (-) lead of the DMM to the Ch1 IsoGnd terminal.

4. Install the D6000 Utility Software or another Modbus Master Program to communicate
with, and calibrate with the module via serial port or a TCP/IP connection.

5. Remove all connections to the +Iout and –Iout terminals on Ch1 and Ch2.

Trim Negative Full Scale:

1. Using the D6000 Utility Software configure both Ch1 and Ch2 analog output ranges to
the +/-10Vdc range. See Table 1.0 below for register and data values.

2. Use the D6000 Utility Software set Ch1 and Ch2 analog outputs to their –Full Scale
value. See Table 2.0 below for register and data values.

3. Trim Negative Full Scale.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Trim the Negative Full Scale output using the register and data value in Table 3.0

below. Write value the channel value to the proper register to increase or
decrease the analog output signal to match the –Full Scale output value.

4. Move the DMM leads to the Ch2 +Vout and IsoGnd terminals.

5. Repeat steps 3a and 3b to trim the negative full-scale output of Ch2.

Trim Positive Full Scale:

1. Move the DMM leads to the Ch1 +Vout and –Vout terminals.

2. Use the D6000 Utility Software set Ch1 and Ch2 analog outputs to their +Full Scale
value. See Table 2.0 below for register and data values.

3. Trim Positive Full Scale.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Trim the Positive Full Scale output using the register and data value in Table 4.0

below. Write value the channel value to the proper register to increase or
decrease the analog output signal to match the +Full Scale output value.

4. Move the DMM leads to the Ch2 +Vout and IsoGnd terminals.

5. Repeat steps 3a and 3b to trim the positive full-scale output of Ch2.

6. Using the D6000 Utility Software set the Ch1 and Ch2 analog output ranges to +10Vdc
range. Repeat steps above calibrate the 0-10Vdc range.

53

4.5.5 Analog Current Output Calibration Procedure
Required Equipment

1. Computer running the D6000 Utility Software or another Modbus Master program.

2. A NIST traceable Digital multimeter (DMM) with 0-20mA range.

Setup Steps – Perform Calibration Steps in Order Listed:

1. Allow unit to warm up for 15 minutes.

2. Connect positive (+) lead of the DMM to the Ch1 +Iout terminal.

3. Connect negative (-) lead of the DMM to the Ch1 -Iout terminal.

4. Install the D6000 Utility Software or another Modbus Master Program to communicate
with, and calibrate with the module via serial port or a TCP/IP connection.

5. Remove all connections to the +Vout and –Vout terminals on Ch1 and Ch2.

Trim Negative Full Scale:

1. Using the D6000 Utility Software configure both Ch1 and Ch2 analog output ranges to
the 0-20mA range. See Table 1.0 below for register and data values.

2. Use the D6000 Utility Software set Ch1 and Ch2 analog outputs to their –Full Scale
value. See Table 2.0 below for register and data values.

3. Trim Negative Full Scale.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Trim the Negative Full Scale output using the register and data value in Table 3.0

below. Write value the channel value to the proper register to increase or
decrease the analog output signal to match the –Full Scale output value.

4. Move the DMM leads to the Ch2 +Iout and –Iout terminals.

5. Repeat steps 3a and 3b to trim the negative full-scale output of Ch2.

Trim Positive Full Scale:

1. Move the DMM leads to the Ch1 +Iout and –Iout terminals.

2. Use the D6000 Utility Software set Ch1 and Ch2 analog outputs to their +Full Scale
value. See Table 2.0 below for register and data values.

3. Trim Positive Full Scale.

a. Write a value of 0x0002h to Control Register 40241 to Write-Enable the module.
b. Trim the Positive Full Scale output using the register and data value in Table 4.0

below. Write value the channel value to the proper register to increase or
decrease the analog output signal to match the +Full Scale output value.

4. Move the DMM leads to the Ch2 +Iout and –Iout terminals.

5. Repeat steps 3a and 3b to trim the positive full-scale output of Ch2.

6. Using the D6000 Utility Software set the Ch1 and Ch2 analog output ranges to 4-20mA
range. Repeat steps above to calibrate the 4-20mA range.

54

4.5.6 Analog Output Calibration Register Tables and Values

Channel Range Registers and Values

Channel Range Control Range Values

Channel 1 40145
Channel 2 40146

Table 1.0 Analog Output Range Registers and Values.

0 = 0-10Vdc

1 = +/-10Vdc

2 = 4-20mA
3 = 0-20mA

Analog Output Registers

Channel Register Force -FS Output Force +FS Output

Channel 1 40049 0000 FFFF
Channel 2 40050 0000 FFFF

Table 2.0 Analog Output Register and Calibration Values.

Trim Negative Full Scale Calibration Registers and Values

Register -Full Scale Output Adjust CH1 CH2

40177 Increase Signal 0000 0001
40178 Decrease Signal 0000 0001

Table 3.0 Trim Negative Full Scale Calibration Registers and Values.

Trim Positive Full Scale Calibration Registers and Values

Register +Full Scale Signal Adjust CH1 CH2

40179 Increase Signal 0000 0001
40180 Decrease Signal 0000 0001

Table 4.0 Trim Positive Full Scale Calibration Registers and Values.

55

4.6 D6710 - Fifteen Bit Digital Input Module

Overview

The D6710 series module contains fifteen digital inputs to monitor process signals such as logic­level status, relay contacts, switch closures, and dry-contacts.

Digital Inputs

The D6710 digital input bits accept signals between +/-30Vdc without damage and contain
internal 10K pull-up resistors for direct connection to dry-contacts.

The digital input logic level switching levels are less than 1.0Vdc for logic “0” and greater than
+3.5Vdc for a logic “1”.

Features and Register Assignments

The D6710 series digital input modules contain many user-selectable features. The user can
select all features such as device address, baud rate and parity type. The complete list of
features is illustrated in the “Fifteen Bit Digital I/O Register Assignments” map below. The register
map format is used for consistency with the Modbus RTU protocol. The register map contains the
register numbers in decimal format, register description, acceptable data values, and list of what
each value means. These registers can be written to using most any Modbus master program or
using theD6000 series utility software.

Note: All Modbus Register values in the tables below are represented as “decimal” numbers.

Connector Pin Designations

The D6710 series module uses two 3.81mm removable plugs for connecting signals to the
module. One six-pin connector is for the power supply and the host RS-485 data line
connections. A second sixteen-pin connector is used to connect digital signals to the module. The

pin designations for each connector are printed on the module label and are listed in a table

below.

56

4.6.2 Fifteen Bit Digital Input Specifications
Connections

Power and Serial Communications

Pin Number Pin Designator
1 GND - Power Supply
2 +VS + Power Supply
3 DATA- RS-485 Data­ 4 DATA+ RS-485 Data+
5 Default* Default*
6 GND - Power Supply

Typical Input

Digital Input Pin Assignments

Bit Number Pin Designator
1 B01
2 B02
3 B03
4 B04
5 B05
6 B06
7 B07
8 B08
9 B09
10 B10
11 B11
12 B12
13 B13
14 B14
15 B15
16 ISO. GND

Specifications

Digital Inputs 15
Input Bit

Internal Pull-up 10K to +5Vdc
Max Voltage +/-30Vdc
Logic ‘0’ <1.0Vdc
Logic ‘1’ >3.5Vdc

Isolation
GND to IGND 500Vrms

Protocol
Serial Modbus RTU

Power Supply
Voltage +10-30Vdc
Power 0.75W

Connectors
Spacing 3.81mm
Max Wire Size 14-24 AWG
Max Current 8 Amperes

LED Designators
01-15 Bit LO = On
F Always Off
T Serial TxD
R Serial RxD

LED Display

57

4.6.3 Fifteen Bit Digital Input Initial Factory Values

Module Parameter Value

Slave Address 1
Baud Rate 9600
Parity Type None
Modbus Response Delay 3mS
Modbus Query Delay 0mS

58

4.6.4 Fifteen Bit Digital Input Register Assignments

Register Description Functions Value Description

40001 Slave Address R/WP 1-DF

Factory set to 0x0001.

40002 UART Setup R/WP Bits 0-4 Baud Rate

5=9600
6=19.2K
7= 38.4K
8=57.6K
9=115.2K

Bits 5-6 Parity
0=No Parity, 8-N-2
1=Odd
2=Even
3=No Parity, 8-N-1
Factory set to 0x0035 = 9600, 8, N, 1.

40003 Modbus Delays R/WP 0-303F Bits 0-7

The Response Delay in milliseconds. This
is required when the RS-485 adapter
cannot tri-state immediately after the last
character is transmitted from the host.
Maximum value is 63mS. Factory default
value is 3.

Bits 8-15
The End of Query Delay in milliseconds
(48mS max). This is an additional time that
the module will wait prior to marking the
end of the message. Slower host
computers may not be able transmit a
continuous message stream, thereby
creating gaps between characters
exceeding the normal 3.5 character times
limit. Factory default value is 0.

See Note 2.
Factory set to 0x0003.

40033 Software Version R

40241 Control Register W

Factory set, Code Version.
0 – Normal operation (NOP)
1 – Remote Reset (write protected)
2 – Write Enable
3 – Synchronous Data sample
5 – Init Host Com Setup

Functions:

R Read Only
R/W Read/Write
WP Write-Protected

Address (hex) Channel # Coil # Using Function Codes 01 and 02

Discrete Coil (DI) Mapping Table

0 0 1 “
1 1 2 “
2 2 3 “

:

15 15 15 “

100 0 1 Sync Input Data
101 1 2 “
102 2 3 “

: “

10E 14 15 “

59

4.7 D6720 - Fifteen Bit Digital Output Module

Overview

The D6720 series digital output module contains fifteen digital outputs for controlling process
control devices such as relays, lamps, annunciators and other ON/OFF devices.

Digital Outputs

The D6720 series open-collector digital outputs can be pulled up to +30Vdc max and each bit can
sink up to 100mA. The open-collector output provides maximum flexibility to control many
different process control devices.

Features and Register Assignments

The D6720 series digital output modules contain many user-selectable features. The user can
select all features such as baud rate, parity type, power-on bit state and communications
watchdog timer interval. The complete list of features is illustrated in the “Fifteen Bit Digital I/O

Register Assignments” register map below. The register map format is used for consistency with

the Modbus RTU protocol. The register map contains the register numbers in decimal format,
register description, acceptable data values, and list of what each value means. These registers
can be written to using most any Modbus master program or using the D6000 series utility
software.

Note: All Modbus Register values in the tables below are represented as “decimal” numbers.

Factory Initial Values

The D6720 series digital output modules are initialized at the factory with a set of “Initial Values”.
A complete list of factory “Initial Values” can be found in the table below. For reference purposes,
the Modbus Slave address is preset to hex 0x01, the baud rate is 9600, Parity type is None and
the Stop Bits is “1”.

Communications Watchdog Timer

The D6720 series digital output module contains a user-programmable communications
watchdog timer. The communications watchdog timer can be used to force the digital outputs to a
known “safe” condition in the event of a communications lost to the module. The known “safe”
condition can be user-programmed into the module Initial Value register.

Connector Pin Designations

The D6720 series module uses two 3.81mm removable plugs for connecting signals to the
module. One six-pin connector is for the power supply and the host RS-485 data line
connections. A second sixteen-pin connector is used to connect digital signals to the module. The

pin designations for each connector are printed on the module label and are listed in a table

below.

60

4.7.2 Fifteen Bit Digital Output Specifications
Connections

Power and Serial Communications

Pin Number Pin Designator
1 GND - Power Supply
2 +VS + Power Supply
3 DATA- RS-485 Data­ 4 DATA+ RS-485 Data+
5 Default* Default*
6 GND - Power Supply

Typical Output Circuit

Digital Output Pin Assignments

Bit Number Pin Designator
1 B01
2 B02
3 B03
4 B04
5 B05
6 B06
7 B07
8 B08
9 B09
10 B10
11 B11
12 B12
13 B13
14 B14
15 B15
16 ISO. GND

Specifications

Digital Outputs 15
Output Bit

Open-Collector 30Vdc, 100mA
Vsat 0.3V @ 100mA
Short Circuit 500mA max
Type Sinking

Isolation
GND to IGND 500Vrms

Watchdog Timer
Range 0 to 655.35 Sec
Resolution 0.35 Sec

Protocol
Serial Modbus RTU

Power Supply
Voltage +10-30Vdc
Power 1.0W

Connectors
Spacing 3.81mm
Max Wire Size 14-24 AWG
Max Current 8 Amperes

LED Designators
01-15 Bit LO = On
F Always Off
T Serial TxD
R Serial RxD

LED Display

61

4.7.3 Fifteen Bit Digital Output Initial Factory Values

Module Parameter Value

Slave Address 1
Baud Rate 9600
Parity Type None
Modbus Response Delay 3mS
Modbus Query Delay 0mS
Digital Output Initial Value 0x0000 = All Outputs Off
Watchdog Timer Low Word 0xffff, = Disabled

62

4.7.4 Fifteen Bit Digital Output Register Assignments

Register Description Functions Value Description

40001 Slave Address R/WP 1-DF
40002 UART Setup R/WP Bits 0-4 Baud Rate

40003 Modbus Delays R/WP 0-303F Bits 0-7

40033 Software Version R
40096 Watchdog Timer

Interval

40097 Initial Value R/WP 0.FFFF Starting condition of Coils 1-15. Bit #0 is

40241 Control Register W

R/WP 0.FFFF The interval of time in seconds that must

Factory set to 0x0001.
5=9600

6=19.2K
7= 38.4K
8=57.6K
9=115.2K

Bits 5-6 Parity
0=No Parity, 8-N-2
1=Odd
2=Even
3=No Parity, 8-N-1
Factory set to 0x0035 = 9600, 8, N, 1.

The Response Delay in milliseconds. This
is required when the RS-485 adapter
cannot tri-state immediately after the last
character is transmitted from the host.
Maximum value is 63mS. Factory default
value is 3.

Bits 8-15
The End of Query Delay in milliseconds
(48mS max). This is an additional time that
the module will wait prior to marking the
end of the message. Slower host
computers may not be able transmit a
continuous message stream, thereby
creating gaps between characters
exceeding the normal 3.5 character times
limit. Factory default value is 0.

See Note 2.
Factory set to 0x0003.
Factory set, Code Version.

elapse after the last communication to the
module or since the power was applied,
before the outputs are set to the Initial
Value. The purpose of the Watchdog Timer
is to force the digital outputs to a known
safe value in the event of a host or
communications link failure. The Watchdog
Timer may be disabled by setting the value
to 0xFFFF hex.

Factory set to 0xFFFF.

Ch0. Initial Value bits set to Logic 1 will be
initialized to the “On” state. Bits set to Logic
0 will be initialized to the “Off” state.

Factory Set to 0x0000.
0 – Normal operation (NOP)
1 – Remote Reset (write protected)
2 – Write Enable
3 – Synchronous Data sample
5 – Init Host Com Setup

63

Address (hex) Channel # Coil # Using Function Codes 01 and 02

Discrete Coil (DI) Mapping Table

0 0 1 “
1 1 2 “
2 2 3 “

:

E E E “

100 0 1 Sync Input Data
101 1 2 “
102 2 3 “

: “

10E 14 15 “

Functions:

R Read Only
R/W Read/Write
WP Write-Protected

64

5.0 Modbus Protocol

The D6000 series modules utilize the Modbus RTU protocol for communications. The Modbus
RTU protocol is widely supported protocol supported by almost all commercial data acquisition
programs and programmable controllers in the marketplace. This allows for easy connection of a
D6000 series module to an existing system or new application.

The D6000 series modules utilize up to eight different functions from within the Modbus RTU
protocol. The number of functions utilized by a module depends on the model type and the
features it contains.

The Modbus functions allow users to control every function within a module. The functions and
their descriptions are listed below. Each function is also outlined in further detail below.

Function Description

01
02
03
04
05
06
0F
10

Return coil status of discrete output points
Read ON/OFF status of discrete inputs in the slave device
Read content of holding registers (4X references) in the slave device
Read content of input registers (3X references) in the slave device
Force state of a single coil (digital output) to either ON or OFF
Preset the state of a single register to a specific value
Force the state of a sequence of coils (digital outputs) to a specific state
Preset a sequence of registers (4X references) to specific values

65

5.1.1 Function 01 – Read Coil Status

This function returns the coil status of discrete digital output points. A typical function 01
command and response is detailed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Starting Address HI Byte
Addr LO Starting Address LO Byte

Data HI Typically ZERO
Data LO Number of bits, limited to 1..64

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Register Number Number of data bytes Typically returns four bytes
Data HI Data Coils (27-20)

Data LO Data Coils (35-28)
Data HI Data Coils (43-36)

Data LO Data Coils (51-44)
Error Check Two Byte CRC

66

5.1.2 Function 02 – Read Input Status

Read the ON/OFF status of discrete digital input bits in the slave device. A typical function 02
command and response is detailed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Starting Address HI Byte
Addr LO Starting Address LO Byte

Data HI Typically ZERO
Data LO Number of bits, limited to 1..64

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Register Number Number of data bytes Typically returns four bytes
Data HI Data Coils (27-20)

Data LO Data Coils (35-28)
Data HI Data Coils (43-36)

Data LO Data Coils (51-44)
Error Check Two Byte CRC

67

5.1.3 Function 03 – Read Holding Registers
This function returns the contents of hold registers (4X references) in the slave device. A typical

function 03 command and response is detailed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Starting Register Address HI Byte
Addr LO Starting Register Address LO Byte

Data HI Typically ZERO
Data LO Number of registers

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Register Number Number of data bytes Typically returns two bytes
Data HI HI Byte (8-bits)

Data LO LO Byte (8-bits)
Error Check Two Byte CRC

68

5.1.4 Function 04 – Read Input Registers
This function returns the contents of hold registers (3X references) in the slave device. A typical

function 04 command and response is detailed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Starting Register Address HI Byte
Addr LO Starting Register Address LO Byte

Data HI Typically ZERO
Data LO Number of registers

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Register Number Number of data bytes Typically returns two bytes
Data HI HI Byte (8-bits)

Data LO LO Byte (8-bits)
Error Check Two Byte CRC

69

5.1.5 Function 05 – Force Single Coil
This function forces the state of a single coil (digital output) to either the ON or OFF state. A

typical function 05 command and response is listed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Coil Address HI Byte
Addr LO Coil Address LO Byte

Data HI Force Data HI
Data LO Force Data LO

Data Values: The proper values are either 0xFF00 to enable (Turn ON) a bit or 0x0000

to disable (turn off) a bit.

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Coil Address HI Byte Same value as in command above.
Addr LO Coil Address LO Byte Same value as in command above.

Data HI Force Data HI Same value as in command above.
Data LO Force Data LO Same value as in command above.

Error Check Two Byte CRC

70

5.1.6 Function 06 – Preset Single Register

This function presets the state of a single register to a specific value. A typical function 06
command and response is listed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Starting Register Address HI Byte
Addr LO Starting Register Address LO Byte

Data HI Force Data HI
Data LO Force Data LO

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Addr HI Register Address HI Byte Same value as in command above.
Addr LO Register Address LO Byte Same value as in command above.

Data HI Preset Data value HI Same value as in command above.
Data LO Preset Data value LO Same value as in command above.

Error Check Two Byte CRC

71

5.1.7 Function 0F – Force Multiple Coils

This function is used to force the state of multiple coils (digital outputs) in a digital output module.
A typical function 0F command and response is listed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Starting Addr HI Starting Address HI Byte
Starting Addr LO Starting Address LO Byte

Qty Coils HI Number of Coils to Write HI
Qty Coils LO Number of Coils to Write LO

Byte Count Number of Data Bytes Transmitted
Force Data HI Force Data HI

Force Data LO Force Data LO

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Starting Addr HI Starting Address HI Byte Same value as in command above.
Starting Addr LO Starting Address LO Byte Same value as in command above.

Qty Coils HI Qty Coils HI Same value as in command above.
Qty Coils LO Qty Coils LO Same value as in command above.

Error Check Two Byte CRC

72

5.1.8 Function 10 – Preset Multiple Registers

This function presets the state of multiple registers to specific values. A typical function 10
command and response is listed below:

Command Usage:

Address One Byte Slave Address
Function One Byte Function Number

Starting Addr HI Starting Register Address HI Byte
Starting Addr LO Starting Register Address LO Byte

Num Registers HI Number of Registers to Write HI
Num Registers LO Number of Registers to Write LO

Byte Count Number of Data Bytes Transmitted
Data HI Force Data HI

Data LO Force Data LO

Response Message:

Address One Byte Slave Address
Function One Byte Function Number

Starting Addr HI Starting Address HI Byte Same value as in command above.
Starting Addr LO Starting Address LO Byte Same value as in command above.

Num Registers HI Preset Data value HI Same value as in command above.
Num Registers LO Preset Data value LO Same value as in command above.

Error Check Two Byte CRC

73

5.2 Modbus Exceptions

The following Modbus Exception (Error Codes) may be returned from the D6000 series modules.
These Exception Codes are returned when an error is detected within the command messages
transmitted to the module. All Exception Code numbers are indicated below with a detailed
description of possible causes.

Modbus Exception Codes

Exception Name Description

01 Illegal Function This exception code is generated when

the module does not recognize the
function code.

02 Illegal Data Address This exception code is generated when

the module does not support the specified
data address in the command.

03 Illegal Data Value This exception code is generated if the

command data is out of range for the
function.

06 Slave Busy This exception code is generated during

the first 3 seconds after the module is
reset or powered up.

07 Negative Acknowledge This exception code is generated if the

command tries to write a value into the
module EEPROM without being write­enabled first.

74

Notes:

Version 1.3

75

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
co mponent upon which liability is based. In no even t shall OMEGA be liable for
consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) N UMBE R FRO M OMEG A’ S CUS T OMER S ERVICE DEPA RTM ENT ( I N ORD E R TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.

FOR WARRANTY

RETURNS, please have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which the product

was PURCHASED,

2. Model and serial number of the product under

warranty, and

3. Repair instructions and/or specific problems

relative to the product.

FOR NON-WARRANTY REPAIRS,

consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2012 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.

M5152/0612

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

Shop online at omega.com

SM

TEMPERATURE

䡺⻬

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

䡺⻬

Wire: Thermocouple, RTD & Thermistor

䡺⻬

Calibrators & Ice Point References

䡺⻬

Recorders, Controllers & Process Monitors

䡺⻬

Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

䡺⻬

Transducers & Strain Gages

䡺⻬

Load Cells & Pressure Gages

䡺⻬

Displacement Transducers

䡺⻬

Instrumentation & Accessories

FLOW/LEVEL

䡺⻬

Rotameters, Gas Mass Flowmeters & Flow Computers

䡺⻬

Air Velocity Indicators

䡺⻬

Turbine/Paddlewheel Systems

䡺⻬

Totalizers & Batch Controllers

pH/CONDUCTIVITY

䡺⻬

pH Electrodes, Testers & Accessories

䡺⻬

Benchtop/Laboratory Meters

䡺⻬

Controllers, Calibrators, Simulators & Pumps

䡺⻬

Industrial pH & Conductivity Equipment

DATA ACQUISITION

䡺⻬

Data Acquisition & Engineering Software

䡺⻬

Communications-Based Acquisition Systems

䡺⻬

Plug-in Cards for Apple, IBM & Compatibles

䡺⻬

Data Logging Systems

䡺⻬

Recorders, Printers & Plotters

HEATERS

䡺⻬

Heating Cable

䡺⻬

Cartridge & Strip Heaters

䡺⻬

Immersion & Band Heaters

䡺⻬

Flexible Heaters

䡺⻬

Laboratory Heaters

ENVIRONMENTAL
MONITORING AND CONTROL

䡺⻬

Metering & Control Instrumentation

䡺⻬

Refractometers

䡺⻬

Pumps & Tubing

䡺⻬

Air, Soil & Water Monitors

䡺⻬

Industrial Water & Wastewater Treatment

䡺⻬

pH, Conductivity & Dissolved Oxygen Instruments