Diamond technologies DT7000 User manual

DT7000
Communication I/O Gateway
User’s Guide
Version 2.6

DT7000 Gateway User’s Guide 2.61 Page 2 of 22
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Liability
Diamond Technologies Inc. shall not be liable for technical or editorial errors or omissions contained herein, nor for
incidental or consequential damages resulting from the use of this material. Those responsible for the use of this device must
ensure that all necessary steps have been taken to verify that the applications meet all performance and safety requirements
including any applicable laws, regulations, codes, and standards.
There are many applications of this product. The examples and illustrations in this document are included solely for
illustrative purposes. Because of the many variables and requirements associated with any particular implementation,
Diamond Technologies Inc. cannot assume responsibility for actual use based on these examples and illustrations.
Diamond Technologies Inc., reserves the right to modify our products in line with our policy of continuous product
development. The information in this document is subject to change without notice and should not be considered as a
commitment by Diamond Technologies Inc.
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DT7000 Gateway User’s Guide 2.61 Page 3 of 22
i Revision History
Version Date Description
1.0 09/28/08 Original Version
2.0 01/21/09 Update for Version 2.x Firmware
2.1 07/12/10 Update CANopen support.
2.2 10/01/10 Separated Network Supplements.
2.3 02/15/11 Fixed bit numbering in Generic Serial Driver
2.4 08/11/11 Minor text updates
2.5 11/08/11 Updated MODBUS mapping
2.6 07/15/12 Updated formatting
2.61 05/05/14 Logo Updates
ii Reference Documents
iii Table of Contents
i Revision History....................................................................................................................................................................3
ii Reference Documents...........................................................................................................................................................3
iii Table of Contents.................................................................................................................................................................3
1.0 Introduction........................................................................................................................................................................4
2.0 DT7000 – Module..............................................................................................................................................................4
2.1 Module Layout..............................................................................................................................................................5
2.2 Module Mounting..........................................................................................................................................................5
2.3 Input Power...................................................................................................................................................................5
2.4 Serial Port Connections.................................................................................................................................................6
2.5 Digital I/O Connections.................................................................................................................................................7
2.6 Analog I/O Connections................................................................................................................................................9
2.7 Fieldbus Connection......................................................................................................................................................9
2.8 Mating Connectors........................................................................................................................................................9
2.9 Module Indicators .......................................................................................................................................................10
2.10 Module DIP Switches................................................................................................................................................10
3.0 Communications ..............................................................................................................................................................11
3.1 Serial Communications Settings......................................................................................................................................11
3.2 Fieldbus Data Format.......................................................................................................................................................12
3.2 Generic Serial Driver.......................................................................................................................................................14
4.0 Supported Networks.........................................................................................................................................................15
4.1 MODBUS-RTU (Native Serial Ports)..............................................................................................................................16
5.0 Diagnostic Interface.........................................................................................................................................................17
5.1 Startup.........................................................................................................................................................................18
5.2 Interface Menu ...........................................................................................................................................................20
5.3 Updating the Module Firmware ..................................................................................................................................21
6.0 Technical Specifications ..................................................................................................................................................22

DT7000 Gateway User’s Guide 2.61 Page 4 of 22
1.0 Introduction
This document covers Diamond Technologies DT7000 Communications I/O Gateway. This module provides a
gateway between industrial networks, and serial devices as well as providing digital and analog I/O and local
control capabilities.
The DT7000 utilizes one of the available Anybus CompactCom modules for the desired fieldbus. This module
can be replaced with any of the other available Anybus CompactCom modules to provide a gateway to most
industrial fieldbus networks.
As standard the device supports MODBUS-RTU through the serial ports, and can be a MODBUS master and/or a
MODBUS slave. Also the module supports a generic serial driver which allows any serial data to be passed
through the serial device to the installed fieldbus. The module also includes digital and analog I/O which can be
accessed through the fieldbus.
A version of the module is available with an Ethernet interface. The Ethernet interface provides communication to
the module via Ethernet. This Ethernet interface is in addition to the CompactCom interface which also may be
Ethernet based.
A user application, developed in C can be installed in the module to provide data translation and local control.
This allows for instance ASCII serial data sent by a serial device to be converted to real number values on the
fieldbus, or a digital output to be set when an analog input value exceeds a limit. Simple C applications are
installed on top of the DT7000 standard firmware to implement virtually any control or interface application
supported by the DT7000 interfaces.
2.0 DT7000 – Module
The DT7000 module includes four serial ports (PORT A, B, C and D). These ports can be configured as master or
slave using the standard MODBUS-RTU protocol. Alternatively the ports can be configured to support the
generic serial driver to allow control of serial devices over the fieldbus network with protocols implemented on
the host. With an installed user application any serial protocol can be implemented in the module by the user. The
module includes 8 digital outputs, 8 digital inputs, 4 analog outputs and 8 analog inputs. The I/O data, serial data,
or any local control data generated by the user application, is mapped onto the installed fieldbus according to the
user configuration. Different Anybus-CompactCom modules can be installed in the DT7000 module to connect to
the various fieldbus networks. The following fieldbus networks are currently supported by the DT7000.
Profibus
DeviceNet
CANopen
EtherCat
EtherNet/IP
MODBUS-TCP
Profinet-IO
MODBUS-RTU
ControlNet

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2.1 Module Layout
The figure below, shows the module layout, and can be used to identify the components listed in the following
sections.
DT7000 Board Layout
2.2 Module Mounting
The DT7000 provides four mounting holes (Z1, Z2, Z3, and Z4). These are 0.120” diameter holes with a
surrounding pad of 0.200”. Mounting hole Z2 is connected to Earth Ground. The other holes are not connected.
Various DIN rail and enclosure mounting options are available for the DT7000. Contact the factory for
information.
2.3 Input Power
The DT7000 requires input power of 9 to 40 VDC (24 VDC nominal), at the terminal block connector (J19).
Alternatively for some applications a 3 pin pluggable connector (J17) is used for power in.
Refer to the following table for the power connections.

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Input Power:
J19 Pin J17 Pin SIGNAL
1 1 PE
2 2 +V
3 3 -V
Power for the I/O devices is supplied through the I/O connector (J10). The I/O supports voltages from 5 to 40
VDC. Two jumpers on the board (R67, and R68) can be installed to tie the input power to the I/O connector. This
defeats the optical isolation but allows driving I/O devices with the power supplied to the module.
2.4 Serial Port Connections
The DT7000 includes four serial ports. Each serial port is either RS232 or RS485. For B versions of the module,
only the RS232 connectors are included. Refer to the following tables, for connecting serial devices to the
DT7000.
DT7000 Serial Connections
RS232:
PORT A (J7) PORT B (J16) PORT C (J26) PORT D (J25) SIGNAL
1 1 1 1 GND
2 2 2 2 RX
3 3 3 3 TX
4 4 4 4 GND
5 5 5 5 ENB
RS485:
PORT A (J13) PORT B (J4) PORT C (J28) PORT D (J29) SIGNAL
1 1 1 1 GND
2 2 2 2 A (D-)
3 3 3 3 B (D+)
4 4 4 4 +5V
If the ENB signal on the RS232 connector is tied to GND, the RS232 is active and the RS485 is disabled. If not,
the RS485 is active, and the RS232 is disabled. Pins 4 and 5 should be connected on the RS232 (J13, J4)
connector to enable the RS232. Alternatively the ports can be forced to RS232 via the configuration, eliminating
the need to connect pins 4 and 5.
The GND and +5V on the RS485connectors can be used for biasing resistors if desired. Refer to the RS485
specification for information on terminating and biasing the RS485 network. No more then 50 mA should be
drawn from the 5V on the RS485 connector. A termination resistor can be installed on the board if desired.
The port A and port B RS485 ports can be built as isolated RS485. Contact the factory for more information if
isolated RS485 is desired.

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2.5 Digital I/O Connections
The digital I/O is accessed through the 26 pin connector (J10). The module provides 8 digital outputs and 8 digital
inputs. The digital inputs and outputs are optically isolated and can be ordered as either sinking or sourcing.
The output transistors are N channel MOSFET transistors capable of sinking or sourcing up to 1.5A. (Note current
for the entire module should be limited to 6 A). They include over temperature, over current, transient voltage,
and ESD protection. They are suitable for driving relays or other inductive loads directly.
When configured as sinking the output transistors are open drain with source tied to the I/O GND.
Digital Outputs (8X) Sinking:
When configured as sourcing the output transistors are open source with the drain tied to IO power.
Digital Outputs (8X) Sourcing:
When the inputs are configured as source in, they require a current source on the input pin to turn on.
Digital Input (8X) (Source in):
When they are configured as sink in they require a current sink on the input pin to turn on.

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Digital Input (8X) (Sink in):
The I/O configuration (sourcing or sinking) is not user configurable and must be specified at order. If required,
any combination of sourcing and sinking inputs and outputs can be configured on the same module. Contact the
factory for special configurations.
Refer to the following table for connecting the Digital I/O.
Digital I/O:
J10 Pin Signal J10 Pin Signal
1 OUT-0 2 XV
3 OUT-1 4 XV
5 OUT-2 6 XV
7 OUT-3 8 XV
9 OUT-4 10 XV
11 OUT-5 12 IN-0
13 OUT-6 14 IN-1
15 OUT-7 16 IN-2
17 XGND 18 IN-3
19 XGND 20 IN-4
21 XGND 22 IN-5
23 XGND 24 IN-6
25 XGND 26 IN-7
All inputs and outputs are rated for 5 to 40 VDC. If jumpers R67 and R68 are installed the input voltage to the
module is connected to the XV pins on the connector. This voltage can then be used to power I/O devices. Note
the total current draw of all the I/O devices must be limited to 3 Amps if R67 and R68 are installed.
Alternatively jumpers R67 and R68 can be removed and any voltage from 5 to 40 VDC can be supplied to the XV
pins on the connector. This allows the I/O to operate at a voltage different then the module supply voltage. With
jumpers R67 and R68 removed the inputs and outputs are optically isolated from the module power. With R67
and R68 removed the current draw of all the I/O devices must be limited to 6 Amps.
Each input and output has a status LED (D6-D13) numbered 0-7 on the board silkscreen. Each LED includes a
green element which is illuminated when the corresponding input is on, and a yellow element which is
illuminated when the corresponding output is on.
The XV LED (D4) shows the status of the external I/O voltage. This will be illuminated green if I/O voltage is
present. It will be red if I/O voltage is connected with polarity reversed.

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2.6 Analog I/O Connections
The analog I/O is accessed through the 8 pin connectors (J18 and J21). The module provides 2 analog outputs and
4 analog inputs on each of the connectors (4 analog outputs and 8 analog inputs total).
Analog outputs are 0 to 10 volt, 10 bit outputs. If required the board can be configured for 0 to 5 volt outputs or 0
to 20 mA outputs. Analog inputs are 0 to 10 volt 10 bit inputs. If required the board can be configured for 0 to 5
volt or 0 to 20 mA inputs. Custom configurations are possible. Please contact the factory for custom analog
configurations. (The 0 to 20 mA inputs/outputs can be used to for 4 to 20 mA signals with a corresponding loss of
resolution).
Refer to the following table for connecting the analog I/O.
Analog I/O:
J18 Pin Signal J21 Pin Signal
8 ANOUT-0 8 ANOUT-2
7 ANOUT-1 7 ANOUT-3
6 +5V 6 +5V
5 GND 5 GND
4 ANIN-0 4 ANIN-4
3 ANIN-1 3 ANIN-5
2 ANIN-2 2 ANIN-6
1 ANIN-3 1 ANIN-7
The analog I/O can be mapped to the fieldbus data as needed via the user configuration. Additionally a user
application can be used to calibrate, average, and convert analog values as needed.
The +5V available on the connector can be used to power external signal conditioning hardware if needed. No
more the 200 mA should be drawn +5V supply.
2.7 Fieldbus Connection
The fieldbus connects to the fieldbus connector on the Anybus-CompactCom module. This connector is fieldbus
specific. There are also LEDs on the Anybus-CompactCom module. Refer to the ABCC module documentation
for information on the fieldbus connection, and the LEDs on the module.
2.8 Mating Connectors
The serial and analog connectors on the DT7000 are Molex latching connectors. The digital connector is a 26 pin
header connector, suitable for ribbon cable or discrete wire connectors. The following table lists the recommended
mating connectors.
DT7000 Mating Connectors
Type Ref Mating Connector Crimp Pin
RS232 J7,J16,J26,J25 Molex 50-57-9405 Molex 90119-2109
RS485 J13,J4,J28,J29 Molex 50-57-9404 Molex 90119-2109
Analog J18,J21 Molex 50-57-9408 Molex 90119-2109
Digital J10 Amp 102387-6 Amp 1-87756-8

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2.9 Module Indicators
There are four power LEDs on the module. They are listed in the table below.
DT7000 Power LEDs
Ref Green Red
D1 +24V Pow OK Reverse Input Power
D2 +5V Pow OK Resettable Fuse Tripped
D3 +3.3V Pow OK -
D4 IO Pow OK Reverse I/O Power
D1 indicates 24 V power is applied to the module. D2 and D3 indicate the internal voltages are being generated.
All (3) LEDs will be on green when the module is operating properly. D4 indicates the I/O power is applied to the
module and will be illuminated green when I/O power is present.
There is a red/green dual color status LED (D5) on the module. On power up the LED flashes alternately red and
green to indicate the module is starting up. Once the module is initialized, the status LED has the following
meaning.
DT7000- Status LED Indications
D5 – State Indication
Flashing RED Not Communicating to Serial Device
Flashing GREEN Communicating to Serial Device
Flashing mostly off
(RED or GREEN) Not Communicating on Fieldbus
Flashing mostly on
(RED or GREEN) Communicating on Fieldbus
Solid RED Module failure
2.10 Module DIP Switches
There is an 8 position DIP switch on the module. The 8 switches are used to set the network address on the
fieldbus. These switches set an address in binary. A switch in the up (OFF) position corresponds to a 1 bit.
Example: Address 05.
Address Switch Position
1 2 3 4 5 6 7 8
05 up dn up dn dn dn dn dn
If the switches are all down (0 value), then the module will read the fieldbus address from the EEPROM on the
CompactCom module. This should also be used if the fieldbus address will be set over the network by a network
configuration tool. The fieldbus address in the EEPROM can also be set through the diagnostics port. The
switches can be used to reset all configurable parameters in the DT7000 to factory default values, and to erase the
user application. If the switches are all up (255 value) on power up, the status LED (D5) will flash red for 5
seconds, and on the diagnostic port a message (*** Change Switches to Reset to Factor Defaults ***) will be
displayed. Changing any switch value at this time will reset the module to a factory default state. If the switches
remain unchanged, the module will start with a switch value of 255.

DT7000 Gateway User’s Guide 2.61 Page 11 of 22
The meaning of the address and the valid range is fieldbus specific. Refer to the specific fieldbus supplement for
the exact meaning of the dip switch settings.
If the module is configured as a MODBUS master or MODBUS slave, the MODBUS master and MODBUS slave
device IDs are kept in FLASH. By default a master module will attempt to communicate to MODBUS device ID
1, and a slave module will respond to requests to MODBUS device ID 1. Other MODBUS device IDs can be set
and stored through the diagnostics port. If no CompactCom module is installed, the DIP switches will set the
MODBUS salve device ID.
3.0 Communications
The DT7000 provides communications through 4 serial ports. The serial ports can be configured for various
functions including Diagnostic port, MODBUS slave, MODBUS master, MODBUS route port, Generic serial
driver, or custom protocol.
The Anybus CompactCom module provides connectivity to any of the available fieldbus protocols. As a slave I/O
device to a PLC or host computer, any of the fieldbus protocols can be used, as supported by the host.
For users wishing to develop an application on a host PC to communicate with the DT7000, MODBUS-RTU or
MODBUS-TCP can be used. ActiveX components implementing MODBUS are readily available and can be used
to simplify application development.
For Ethernet communications to the DT7000, MODBUS-TCP can be used with the MODBUS-TCP
CompactCom module.
For serial communications including USB or Bluetooth, to the DT7000, MODBUS-RTU can be used. A host
application can communicate to one of the 4 serial ports through MODBUS-RTU without the need for a
CompactCom module. Alternatively the MODUB-RTU CompactCom module can be used leaving all 4 serial
ports available. The USB or Bluetooth CompactCom modules can be used, along with a virtual com port driver,
allowing MODBUS-RTU communications through USB or Bluetooth to the DT7000.
3.1 Serial Communications Settings
The communications settings for the serial ports are configured for the application. The module is configured by
default with the following settings.
Port Default Settings
Port BAUD Data Bits Parity Function
Port A 115200 8 None MODBUS Salve
Port B 115200 8 None Available
Port C 115200 8 None Generic Serial
Port D 115200 8 None Diagnostics
Many of the serial settings can be configured through the diagnostic port. These include enabling or disabling the
Generic Serial driver on each port, defining the buffers sizes for the Generic Serial driver, and setting the
communication parameters, including BAUD rate and parity. Some settings can only be configured through a user
application, including enabling MODBUS master functionality or custom serial protocols on a serial port.

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3.2 Fieldbus Data Format
The digital I/O, analog I/O, and serial data are mapped to the field bus data and can be accessed over the installed
fieldbus. This mapping can be configured through the diagnostic port.
The following table lists the default mapping of the data on the fieldbus for this version of the module.
Output Data (Sent from Host to DT7000).
Word Byte Register Function
0 0 Digital Outputs (Outputs 0-7)
1 Reserved
1 2 Analog Output 0
3
2 4 Analog Output 1
5
3 6 Analog Output 2
7
4 8 Analog Output 3
9
5 10 Port A, Driver Control
11 Port A, Send Length
6 12 Port A, Send Byte 0
13 Port A, Send Byte 1
7 14 Port A, Send Byte 2
15 Port A, Send Byte 3
8 16 Port A, Send Byte 4
17 Port A, Send Byte 5
9 18 Port A, Send Byte 6
19 Port A, Send Byte 7
10 20 Port A, Send Byte 8
21 Port A, Send Byte 9
11 22 Port A, Send Byte 10
23 Port A, Send Byte 11
12 24 Port A, Send Byte 12
25 Port A, Send Byte 13
13 26 Port A, Send Byte 14
27 Port A, Send Byte 15
14 28 Port A, Send Byte 16
29 Port A, Send Byte 17
15 30 Port A, Send Byte 18
31 Port A, Send Byte 19

DT7000 Gateway User’s Guide 2.61 Page 13 of 22
Input Data (Sent from DT7000 to Host).
Word Byte Register Function
0 0 Digital Inputs (Inputs 0-7)
1 Reserved
1 2 Analog Input 0
3
2 4 Analog Input 1
5
3 6 Analog Input 2
7
4 8 Analog Input 3
9
5 10 Analog Input 4
11
6 12 Analog Input 5
13
7 14 Analog Input 6
15
8 16 Analog Input 7
17
9 18 Second Timer
19
10 20 Firmware Version
21
11 22 Port A, Driver Status
23 Port A, Receive Length
12 24 Port A, Receive Byte 0
25 Port A, Receive Byte 1
13 26 Port A, Receive Byte 2
27 Port A, Receive Byte 3
14 28 Port A, Receive Byte 4
29 Port A, Receive Byte 5
15 30 Port A, Receive Byte 6
31 Port A, Receive Byte 7
16 32 Port A, Receive Byte 8
33 Port A, Receive Byte 9
17 34 Port A, Receive Byte 10
35 Port A, Receive Byte 11
18 36 Port A, Receive Byte 12
37 Port A, Receive Byte 13
19 38 Port A, Receive Byte 14
39 Port A, Receive Byte 15
20 40 Port A, Receive Byte 16
41 Port A, Receive Byte 17
21 42 Port A, Receive Byte 18
43 Port A, Receive Byte 19
Depending on the particular fieldbus, and the allowed configurations of the Anybus-CompactCom module on that
fieldbus, this data may be represented differently at the host. In all cases some set of input and output modules

DT7000 Gateway User’s Guide 2.61 Page 14 of 22
will be defined to form the equivalent of the mapped input words, output words. For some hosts and masters the
byte order of word data might be reversed. The host must account for these differences.
With an installed user application the data presented on the fieldbus is completely controlled by the application.
This can include, MODBUS master registers, averaged or processed analog data, or data generated internally by
the user application.
3.2 Generic Serial Driver
The generic serial driver allows connection of a serial device to the fieldbus network. The driver allows any data
to be sent to and received from the serial device. This allows specific communications protocols to be
implemented by the host through the fieldbus. A user application also accesses the serial channels through the
generic serial driver, accessing the DT input and output arrays in the same manner as a host.
The generic serial driver defines in the input data array a STATUS word, and an input buffer, and in the output
data array a CONTROL word and an output buffer. The STATUS word and CONTROL word are used to
coordinate the flow of data through the serial driver. The input buffer stores serial data received from the serial
device presented on the fieldbus, and the output buffer stores data placed on the fieldbus to be sent to the serial
device.
The STATUS and CONTROL words include a length field in the upper byte and handshake bits in the lower byte,
as defined below.
Status Word Definition
15-8 7-4 3 2 1 0
RX Length Reserved MORE SYNCACK TXACK RXDAT
RXDAT – Toggles when received serial data is available on the fieldbus.
TXACK – Toggles when output data has been sent to serial device.
SYNCACK – Set to 1 to acknowledge a Synch request.
MORE – Set to 1 if additional data has been received beyond what is in
the Input buffer. This indicates the received data has been
fragmented to fit in the input buffer and more data needs to be
read after this input buffer is read.
Control Word Definition
15-8 7-4 3 2 1 0
TX Length Reserved MORE SYNC TXDAT RXACK
RXACK – Toggled by host to acknowledge receive serial data has been
read. When this is toggled the input buffer will be cleared and
filled with more serial data if available.
TXDAT – Toggled by host to indicate data in output buffer is available to
be sent to the serial device.
SYNC – Set to 1 to request a synchronization. The input buffer is
cleared and all status word bits are set to 0.
MORE – Set to 1 if data has been fragmented to fit in output buffer, and
more data needs to be sent immediately after the output buffer
has been sent.
The host should follow the procedure outlined here to send and receive data from the serial device.

DT7000 Gateway User’s Guide 2.61 Page 15 of 22
Sending data to the serial device:
1. Place data to be sent in the output buffer.
2. Place length of data to be sent in TX Length field.
3. If data has been fragmented set MORE bit.
4. Toggle the TXDAT bit.
5. Wait for the TXACK bit to toggle to match the TXDAT bit.
6. If more data is to be sent repeat from step 1.
Receiving data from the serial device:
1. Wait for the RXDAT bit to toggle to be different then the RXACK bit.
2. Read the serial data from the input buffer.
3. If the MORE bit is set the data is a fragment and can be reassembled with additional data to follow.
4. Toggle the RXACK bit to match the RXDAT bit indicating data has been read.
5. Input buffer will be cleared, and/or filled with additional data if available.
6. Repeat from step 1.
Note: If the serial device can send data unsolicited the host must monitor the STATUS word and read data as it
becomes available to avoid data loss.
4.0 Supported Networks
The following fieldbus networks are currently supported. The corresponding Anybus CompactCom module is
installed to support a given fieldbus network. Support for additional fieldbus networks will be added in the future.
Profibus
DeviceNet
CANopen
EtherCat
EtherNet/IP
Profinet-IO
ControlNet
MODBUS-TCP
MODBUS-RTU
In addition to the fieldbus networks the following passive Anybus CompactCom modules are available and
supported by the DT7000.
USB
Bluetooth
The passive modules provide a serial pass through connection between the DT7000 and a host, over a different
media. The passive modules internally connect to port C of the DT7000, disabling the port C connectors J26 and
J16. With a passive module installed, a serial protocol (such as MODBUS RTU) enabled on port C will pass
through the installed media (USB or Bluetooth) to the host.
Information on configuring the DT7000 for use on a specific fieldbus with the associated CompactCom can be
found in the respective network supplement for the fieldbus.

DT7000 Gateway User’s Guide 2.61 Page 16 of 22
4.1 MODBUS-RTU (Native Serial Ports)
The DT700 supports the Anybus-CompactCom Modbus-RTU module for MODBUS-RTU connectivity.
Information regarding using this module can be found in the Modbus-RTU network supplement.
It is also possible to communicate to the DT7000 through one of the 4 serial ports using MODBUS-RTU, by
enabling this protocol on the desired port. Since the CompactCom passive modules (USB and Bluetooth) are a
pass through to port C, MODBUS-RTU is supported through these modules via port C.
Through the native MODBUS interface the input and output arrays are accessible. In addition it is possible to
access other memory areas in the DT7000. When a user application is installed, the DT arrays and the FB arrays
are both accessible at different address ranges. In addition the AP data array is accessible. Finally the
configuration block is accessible allowing the module to be configured through the MODBUS interface.
The following notes apply to the native MODBUS interface:
The default parameters for the native serial ports are 115200,N,8,1, and can be set through the diagnostics
port.
The native serial ports only support RTU, and do not support MODBUS-Ascii.
Only the function codes listed in the table below are supported through the native serial ports.
The function codes access the various data areas in the DT7000. If no user application is installed, the DT input
array is copied to the FB input array and the FB output array is copied to the DT output array. This means the
same input data can be accessed either through the DTInArray or the FBInArray (these are identical). If the field
bus is active, then the field bus master controls the output data and writing to the output arrays has no effect. If the
field bus is not active and no user application is installed, then the output data can be written through the
DTOutArray (writing to the FBOutArray has no effect). With a user application installed writing to the
DTOutArray is always possible, and to the FBOutArray when the field bus is not active. Note that it is possible to
access the same data with different function codes. The following table shows the mapping of DT7000 memory
areas to the various MODBUS function codes and addresses.

DT7000 Gateway User’s Guide 2.61 Page 17 of 22
Function Code Absolute
Address Modicon 5-digit Address DT7000 Mapping
1 – Read Coils
5 - Write Single Coil 0-2047 00001-02048 DTOutArray 0-127 (As Bits)
5000-7047 05001-07048 FBOutArray 0-127 (As Bits)
2 – Read Discrete Inputs 0-2047 10001-12048 DTInArray 0-127 (As Bits)
5000-7047 15001-17048 FBInArray 0-127 (As Bits)
3 - Read holding Registers
6 - Write Single Register
16 - Write Multiple Registers
0-127 40001-40128 DTOutArray 0-127
256-383 40257-40384 DTInArray 0-127
1024-2432 41025-42433 Ap Data Array 0-1407
5000-5127 45001-45128 FBOutArray 0-127
5256-5383 45257-45384 FBInArray 0-127
6001-6383 46001-46384 Config Data 0-383
4 - Read Input Registers 0-127 30001-30128 DTInArray 0-127
5000-5127 35001-35128 FBInArray 0-127
The output arrays, AP data array, and configuration block have read/write access as holding registers and can be
accessed with function codes which access the Holding Registers (3, 6, 16). Bit level access to bits in the output
array words is possible with the Read Coil, and Write Coil function codes (1, 5).
The input array has read only access (except as noted below). Attempts to write to registers in the input array that
are assigned to functions (writing to the corresponding holding register) will produce an illegal address exception.
Bit level access to bits in the input array words is possible with the Read Discrete Inputs function code (2). Word
level access to the input array is possible with the Read Holding Registers, and Read Input Registers, function
codes (3, 4).
It is possible to use the DT7000 module as a MODBUS-RTU to fieldbus gateway. Through the native serial ports
writing to input array registers that are not assigned to other functions, using function code 6, or 16 to address
40257-40512 is allowed, and will modify values in the input array. The input array can then be read through the
fieldbus. Values written by the fieldbus into the output array can be read using function code 3 to address 40001-
40255. This allows a communications path through the DT7000 from one device which is accessing the DT7000
through the installed fieldbus, and another device which is accessing the DT7000 through MODBUS-RTU
through one of the native serial ports.
5.0 Diagnostic Interface
The diagnostics interface allows for checking the input and output values of the module as well as changing some
of the settings. The diagnostic interface can be used with terminal emulation software such as Hyperterminal
(included with Windows XP), or the open source software, Tera Term which is compatible with Windows 7 and
many other operating systems (www.logmett.com).

DT7000 Gateway User’s Guide 2.61 Page 18 of 22
By default Port D is the diagnostic interface. On power up, diagnostic information will be sent through this port.
Any port, not assigned to another function can be used as a diagnostic port. Connecting to a port that is not
assigned to another function, and pressing ESC, will set this as the diagnostic port and display the main menu. To
save the current diagnostic port for future startup information, update the flash configuration with the ‘U’
command.
The following shows the configuration in Hyperterminal to connect to the diagnostic interface.

DT7000 Gateway User’s Guide 2.61 Page 19 of 22
5.1 Startup
When the DT7000 first powers up, the following data will be displayed through the diagnostic interface. This data
varies depending on the installed fieldbus and the application.
Following this, dots will be displayed across the screen indicating the module is operational.
DT7000 Ver 2.15 I/O Gateway, Diamond Technologies (c) 2011
DT7 Module Type - B
DIP Switches: 0
SwapBytes: 0
CC Exists Type: Active
Port A - : 232
Port B - : 232
Port C - : 232
Port D - : 232
InArrayWords: 22
OutArrayWords: 16
Port A - Modbus Slave Driver Initialized - MOD ID: 1
Port C - Generic Serial Gateway - In[10] Out[10]
AB: Mod type: 0401 - (Anybus CompactCom)
AB: FW Ver: 3.3.1
AB: Net type: 0080 - Modbus-TCP
AB: Param supp: 1
AB: Net Data Fmt: 0
AB: DHCP: 0
AB: Subnet: 0.0.0.0
AB: IP: 0.0.0.0
AB: Run (1537)

DT7000 Gateway User’s Guide 2.61 Page 20 of 22
5.2 Interface Menu
By pressing Esc the main menu will appear. This menu varies depending on the installed fieldbus, and the
application.
Menu options can be selected by pressing the number of letter in front of the option. Configuration values can be
changed as desired.
The input and output array values can be displayed by selecting the ‘N’ option.
The digital outputs can be set by selecting the ‘O’ option. This however is only possible if the fieldbus is not
controlling the outputs. On most networks, unplugging the network cable releases control of the outputs by the
fieldbus, and they can be set with the ‘O’ option.
Configuration of the module can be done with the ‘X’, ‘Y’, ‘Z’, ‘Q’, and ‘P’ options. Once the configuration is
changed it can be stored to flash with the ‘U’ option.
DT7000 Rev 02.15 - Diagnostics Interface (PortD)
7 - Set Module type
N - Network IO array
S - Display Scan Statistics
O - Set Outputs
X - Configure Standard Inputs
Y - Configure Standard Outputs
Z - Configure IO Array Sizes
Q - Configure Serial IO
P - Configure Serial Port Function
G - Load Gateway Logic Code
W - Swap bytes in Field Bus words
L - Configure Diagnostic Logging
I - Set IP Address
K - Set Subnet Mask
D - Set DHCP
U - Update Flash Config
F - Reset to Factory Defaults (Clear Logic Code)