Onicon D-100 User manual

D-100 FLOW DISPLAY
MODBUS Network Interface Installation Guide
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MODBUS
FLOW AND ENERGY MEASUREMENT

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D-100-MOD Flow Display Network Interface Installation Guide 09/15 - 0657-7 / 18346 Page 2

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TABLE OF CONTENTS
1.0 INTRODUCTION ..................................................................................................5
1.1 PURPOSE OF THIS GUIDE .......................................................................5
1.2 TYPICAL D-100 NETWORK INTERFACE MODULE ...............................5
1.3 SPECIFICATIONS ......................................................................................5
1.4 NETWORK SIGNAL CONNECTIONS.......................................................6
1.4.1 RS485...............................................................................................6
1.4.2 TCP/IP .............................................................................................7
1.4.3 Optional Network Interface with
Isolated Digital Pulse Input (Di3) ...................................................8
1.5 RS485 BAUD RATE, BIASING AND TERMINATION............................11
1.5.1 Baud Rate ......................................................................................11
1.5.2 Biasing and Termination...............................................................12
1.6 NETWORK ADDRESSING.......................................................................12
1.6.1 Changing the MAC (Device) Address...........................................12
1.6.2 Changing the IP Address ..............................................................14
1.6.3 Changing the Gateway Address....................................................17
2.0 MODBUS MEMORY MAP..................................................................................20
2.1 MODBUS REGISTER FORMAT AND
NETWORKING INFORMATION .............................................................20
2.2 MODBUS MEMORY MAP TABLE ..........................................................21
2.3 TOTALIZATION, RESETTING TOTALS, OVER-RANGE
AND ROLLOVER .....................................................................................26
3.0 NETWORK TROUBLESHOOTING TIPS ...........................................................28
3.1 TROUBLESHOOTING .............................................................................28
APPENDIX
A-1 D-100 FLOW DISPLAY MODBUS TCP/IP BOARD
A-2 D-100 FLOW DISPLAY MODBUS RS485 BOARD
A-3 D-100 MODBUS TCP/IP AUXILIARY INPUT BOARD (Di3)

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D-100-MOD Flow Display Network Interface Installation Guide 09/15 - 0657-7 / 18346 Page 4

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D-100
SCROLL RESET PROGRAM
ONICON
3864
Steam Building
Domestic Water Supply
Flow rate and total data to
Data Acquisition System or
Building Control System
120VAC or 24VAC
Input Voltage
1.3 SPECIFICATIONS
MODBUS RTU NETWORK INTERFACE
RS485
Transceiver: 2-wire, half-duplex
Data format: 8 bit with 1 stop bit
Parity: None
MAC address (device address) range: 1 - 247 (Default: 017)
Baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600 or 115200 (Default: 9600)
Termination: 120 ohms or none (Default: none)
Biasing: None
Flow control: None
TCP/IP
Transceiver: Base 10T, 10Mbps, Rj45 connection
Data format: 8 bit with 1 stop bit
Parity: None
MAC address (device address) range: 1 - 247 (Default: 017)
Default IP address: 192.168.1.24 (Port 502)
Flow control: None
SECTION 1: INTRODUCTION
1.1 PURPOSE OF THIS GUIDE
The purpose of this guide is to provide installation and commissioning procedures and basic
operating and servicing instructions for the ONICON D-100 MODBUS RTU serial interface.
1.2 TYPICAL D-100 NETWORK INTERFACE MODULE
The D-100 is a totalizing display module that provides a local indication of liquid, gas or
steam ow rate and total data. It can also be provided with an optional MODBUS RTU RS485 or
MODBUS RTU TCP/IP serial interface to communicate data to the building control network.

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CAUTION
Only qualied service personnel should make connections between the D-100 Flow Display
and the user’s external equipment. ONICON assumes no responsibility for damage caused to the
external equipment as a result of an improper installation.
!
Terminal
T1
Do not connect
shields to this
terminal.
CAUTION
Incoming and outgoing RS485 cable shield wires should be connected together, but must not be
connected to the display.
!
1.4 NETWORK SIGNAL CONNECTIONS
1.4.1 RS485
MODBUS RS485, 2-wire (half-duplex) serial output connections are connected to terminal
T1 as shown. Do not exceed 4.4 in-lb (0.5 Nm) of torque when tightening.

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1.4.2 TCP/IP
MODBUS TCP, Base 10T output connections are made as shown. Requires Base 10T cable
and RJ45 connector.
!
CAUTION
Only qualied service personnel should make connections between the D-100 Flow Display
and the user’s external equipment. ONICON assumes no responsibility for damage caused to the
external equipment as a result of an improper installation.

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1.4.3 Optional Network Interface With Isolated Digital Pulse Input (Di3)
The D-100-MODBUS Display can be provided with an auxiliary input pulse for totalizing
pulse outputs from external devices such as water or gas meters. Pulses are accumulated
in an internal register, and the totalized value is available on the network. This register
can be zeroed via the network. The maximum register total is 9,999,999. This register will
rollover to zero when this value is exceeded.
If the auxiliary pulse input option was ordered at the same time the display was ordered,
it will arrive fully congured and ready to use. If it was ordered after the display was
delivered and is being installed as a eld upgrade, it may be necessary to congure the
pulse input. The information required to congure the input is provided below and on the
following pages:
The input pulse must meet the following criteria:
1. Frequency input range, 50 Hz maximum
2. 10 millisecond minimum pulse duration
Input Pulse Denition:
In order to congure the communications card for an auxiliary input pulse, you must
rst determine which type of pulse your meter produces. The allowable types of input
pulses are described on the following pages. Based on the type of pulse, set the selector
switch (S1) on the communications circuit board (Fig. 1) to the correct setting.
Fig. 1
120 ohm Jumper Selectable
Termination Resistor
Pulse Type Selector Switch (S1)
Input Impedance Jumper (J1)
Aux Pulse Input (Di3) Connector (T2)
RS485 Connector (T1)
NOTE: MODBUS TCP shown above. See appendix A-3 for MODBUS TCP/IP auxiliary input board.

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Powered Pulse:
This type of output refers to a pulse which has an associated voltage with it (see Fig. 2).
Set the selector switch, S1 to Pwrd Pulse. The allowable voltage range is 5-24 VDC. The
input impedance is set at the factory to be 11 KOHM via the impedance selector jumper
(J1, see Fig. 1). A lower impedance, 3 KOHM can be selected if required by the instrument
providing the pulse output. Consult the instrument manufacturer or ONICON if you are
uncertain as to the proper jumper selection.
Fig. 2
Open Collector (Sourcing):
This type of output refers to an open Collector Switch congured for a sourcing function
(see Fig. 3). Set the selector switch, S1 to SRC. The switch must be rated for at least 20mA
at 20VDC.
Fig. 3
Di3 In (+)
Di3 In (-)
Di3 In (+)
Di3 In (-)
ONICON
BTU Meter
ONICON
BTU Meter
Pulse Switch and Jumper Location

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Open Collector Sinking or Dry Contact:
This type of output refers to an open collector switch congured in a current sinking
arrangement or a dry contact switch (see Fig. 4 and 5). Set the selector switch, S1 to Sink.
In either case, the switch must be rated for at least 20mA at 20 VDC.
Fig. 4
Fig. 5
Di3 In (+)
Di3 In (-)
Di3 In (+)
Di3 In (-)
ONICON BTU Meter
ONICON BTU Meter