Onicon System-10 BTU Meter User manual

System-10 BTU Meter
Dual Network Interface Installation Guide
(BACnet & MODBUS)
11451 Belcher Road South, Largo, FL 33773 • USA • Tel [phone] • Fax [phone]
www.onicon.com • [email protected] Rev.CDOC-0003376
ON I CON
Flow and Energy Measurement

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System-10 Dual Network Interface Installation Guide Page 2
TABLE OF CONTENTS
SECTION 1: INTRODUCTION ...................................................................4
1.1 PURPOSE OF THIS GUIDE .................................................................................4
1.2 TYPICAL SYSTEM-10 BTU METER...................................................................4
1.3 SPECIFICATIONS ................................................................................................4
1.4 PROTOCOL SELECTION.....................................................................................5
1.5 NETWORK SIGNAL CONNECTIONS.................................................................7
1.5.1 RS485 ...................................................................................................................7
1.5.2 BACnet/IP and/or MODBUS TCP/IP ......................................................................8
1.5.3 Optional Network Interface With Isolated Digital Pulse Input (Di3) ....................9
1.6 BACnet MS/TP BAUD RATE, BIASING & TERMINATION ............................12
1.6.1 Baud Rate...............................................................................................................12
1.6.2 Biasing and Termination .......................................................................................13
1.7 NETWORK ADDRESSING.................................................................................13
1.7.1 Changing the MAC Address and Device Instance Number .................................13
1.7.2 Changing the IP Address, Subnet mask and Gateway Address...........................15
SECTION 2.0: BACnet PICS AND OBJECTS ...........................................16
2.1 Pic Statements....................................................................................................16
2.2 BAC OBJECTS....................................................................................................18
2.3 aDDITIONAL BACnet®Object INFORMATION ...............................................19
2.4 Analog Input(s) ..................................................................................................20
2.5 Analog Value(s) ..................................................................................................21
2.6 Binary Value(s)...................................................................................................22
SECTION 3.0: MODBUS MEMORY MAP ................................................23
3.1 Modbus Register Format And Networking Information...................................23
3.2 Modbus Memory Map........................................................................................24
3.3 Totalization, Resetting Totals, Over-Range & Rollover .....................................29
SECTION 4.0: NETWORK TROUBLESHOOTING TIPS.........................31
4.1 Troubleshooting .................................................................................................31
APPENDIX ........................................................................................33
System-10 BTU Meter Computer Board....................................................................1
System-10 Dual Network Interface Board.................................................................2
System-10 Dual Network Interface Auxiliary Input Board ......................................3

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System-10 Dual Network Interface Installation Guide Page 3

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1.3 SPECIFICATIONS
RS485 (BACnet MS/TP or MODBUS RTU)
Transceiver: 2-wire, half-duplex
Baud rate: 9600, 19200, 38400 & 76800
Termination: 120 ohms or none (Default: none)
Biasing: None
Flow control: None
BACnet UDP/IP & MODBUS TCP/IP
Transceiver: 10Base T, 10Mbps, Rj45 connection
Default IP address: 192.168.1.24
Default Subnet Mask: 255.255.255.0
BACnet Port: 47808
MODBUS Port: 502
Flow control: None
Address Ranges
MODBUS device address range: 1 – 127 (Default: 017)
BACnet device address range: 1 – 127 (Default: 017)
BACnet Device Instance range: 0 - 4,194,303 (Default: 57017)
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 System-10 Dual Network BTU Meter
Network Interface.
1.2 TYPICAL SYSTEM-10 BTU METER
ONICON’S System-10 BTU meter is a true heat (BTU) computer which accepts data from several sen-
sors, performs a series of computations with that data, and displays and/or transmits the results as an
indication of the amount of heat (BTU’s) being transferred per unit time or as a totalized amount.
SYSTEM-10
RETURN
SCROLL RESET PROGRAM
BTU METER
ONICON
3864
FLOW DIRECTION
SUPPLY
24 OR 120 VAC
Input Power
Individual Chiller
or Boiler
System
Mains
Local display of flow, temperature and
energy data
RETURN
TEMP
SENSOR
SUPPLY
TEMP
SENSOR
24 VAC INPUT
BACnet and/or MODBUS
COMMUNICATIONS
TO NETWORK
ONICON insertion
flow meter purchased
separately

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1.4 PROTOCOL SELECTION
The System-10 Dual Network BTU meter is provided with an IP connection and a single RS485 con-
nection. Both MODBUS TCP/IP and BACnet UDP/IP are always available from the IP connection via a
single IPv4 IP address. The RS485 connection can be configured for BACnet MS/TP or MODBUS RTU.
The protocol options are selected via a web configurator page. Configuring the protocol requires the
use of a PC with an Ethernet card and an available port:
PC IP Address 192.168.1.1
Mask 255.255.0.0
The default IP configuration of the System-10 is as follows:
IP Address 192.168.1.24
Mask 255.255.0.0

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Enter the Meter IP Address into the browser and use the default username (default is “admin”) and
password. There is a QR code in the top right corner of the ethernet port with the password. The pass-
word is also located in ethernet port label.
On the web configurator page, the first configuration parameter is the Protocol Selector. Please set the
number base on your protocol communication desired. Only one protocol is allowed to remotely reset
totals on the network.

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1.5 NETWORK SIGNAL CONNECTIONS
1.5.1 RS485
Use 18 – 22 twisted shielded cable for RS485, 2-wire (half-duplex) serial communications. The
cable is connected to terminal T1A. Do not exceed 4.4 in-lb (0.5 Nm) of torque when tightening the
terminals.
CAUTION
Only qualified service personnel should make connections between the System-10 BTU Meter
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
T1A
G terminal only used for
3-wire installations. 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 BTU meter.
!

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1.5.2 BACnet/IP and/or MODBUS TCP/IP
BACnet and/or MODBUS, 10Base T output connections are made through a single Rj45 connector as
shown.
!
CAUTION
Only qualified service personnel should make connections between the System-10 BTU Meter and
the user’s external equipment. ONICON assumes no responsibility for damage caused to the
external equipment as a result of an improper installation.
NOTE: RJ45 Connector
T1B

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1.5.3 Optional Network Interface With Isolated Digital Pulse Input (Di3)
The System-10 BTU Meter can be provided with an auxiliary pulse input for totalizing pulse outputs
from external devices such as water or gas meters. Pulses are accumulated in an internal register. The
totalized value is shown on the display and is available on the network. This register can be zeroed
via the network. The maximum register total is 9,999,999. The register will rollover to zero when this
value is exceeded.
If the auxiliary pulse input option was ordered at the same time the BTU Meter was ordered, it will
arrive fully configured and ready to use. If it was ordered after the BTU Meter was delivered and is
being installed as a field upgrade, it may be necessary to configure the pulse input. The information
required to configure 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 Definition:
In order to configure the communications card auxiliary pulse input, you must first 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 (T1A)
Unused
Leave OFF

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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 configured for a sourcing function (see Fig. 3).
Set the selector switch, S1 to SRC. The switch must be rated for at least 20 mA at 20 VDC.
Fig. 3
Di3 In (+)
Di3 In (-)
Di3 In (+)
Di3 In (-)
ONICON
BTU Meter
ONICON
BTU Meter