Powell BriteSpot BSG3, Instruction Bulletin

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31 Usage
01.4IB.48040C
1) MODBUS RTU (RS-485 2 Wire)
In order to make a MODBUS RTU
connection, use Ch 4 Installation,
E. Connect Network and Power Wiring,
4) Connect Communication Wiring (Two Wire
RS-785 MODBUS) as a guide for the physical
connection of the device. It is assumed the
user has a basic working knowledge of the
MODBUS parameters, therefore, only the
salient details of the implementation on
the G3 are provided. A detailed MODBUS
register listing is provided in Appendix A .
Table M MODBUS RTU Parameters
Parameter
Default
Value
Range/Options
Baud Rate
19200
Baud
9600, 19200, 38400
Baud
Data Bits 8 N/A
Parity None N/A
Stop Bits 1 N/A
Max # of Registers per
Query
N/A 32
Max Polling Rate 3 Seconds N/A
2) MODBUS TCP / IP
In order to make a MODBUS TCP/IP
connection, use Ch. 4 Installation,
E. Connect Network and Power Wiring,
6) Connect Communication Wiring (Modbus
TCP/IP & Ethernet IP) as a guide for the
physical connection of the device. It is
assumed the user has a basic working
knowledge of the MODBUS TCP parameters,
therefore, only the salient details of the
implementation on the G3 are provided.
A detailed MODBUS register listing is
provided in Appendix A .
Table N MODBUS TCP/IP Parameters
Parameter
Default
Value
Range/Options
IP Address 192.168.1.50
XXX.XXX.XXX.XXX (XXX
is 0-255)
Port 502 1-9999
3) Basic MODBUS Queries
The information in Table O is intended to
provide several basic examples of queries
that can be issued to the G3 Conversion
Modules. The examples are far from
exhaustive.
Table O Basic MODBUS Queries
Type
Read
Client ID 1,
Ch 1
Read
Client ID 1,
Ch 1
Temperature °F
Read
Client ID 1,
Ch 1
Registers
Client ID 1 1 1
MODBUS
Function
04
(Read Input
Registers)
04
(Read Input
Registers)
04
(Read Input
Registers)
Quantity 1 1 18
Start
Address
97 115 79
Absolute
Address
30098 30116 30080-30097
4) Basic Ethernet I/P Queries
The conversion module can communicate
using the CIP through Ethernet I/P. This
requires an Ethernet connection to the host
device. An EDS is provided to assist with
the setup. Ensure that desired IP address
information is accessible.
Refer to Appendix A for details.