Environmental Monitoring System (EMS-5X, 10X and OS) Instruction Manual
29
B.
Serial Link / RTU Configuration
Do not
enable both Ethernet/TCP and Serial/RTU Modbus connections at the same time.
The EMS-05 supports both
RS232/RS485 protocols
. RS485 is the default protocol, and an Aqualeak
Engineer will be required if RS232 is required.
The
SerialModbusSettings
attribute folder contains element settings for
Modbus
serial link connections
to
Modbus master devices:
Figure 22:
Expanded SerialModbusSettings Folder
Serial Modbus Settings
Description
EnableModbus
Set to
1
to
enable
modbus
connection via serial link.
Set to
0
to
disable.
SerialModbusMode
Serial Bus Mode. Set to
rtu
or
ascii
to match the SCADA/BMS system. Where able,
ascii
is recommended as this mode is more tolerant to timing problems.
SlaveAddress
Slave Address. Set to match the SCADA/BMS system.
BaudRate
Baud Rate. Set to match the SCADA/BMS system.
BitCount
Bit Count. Set to
7
or
8
to match the SCADA/BMS system.
StopBits
Stop Bits. Set to
1
or
2
to match the SCADA/BMS system.
Parity
Set to
0 (none)
,
1 (even)
, or
2 (odd)
to match the SCADA/BMS system.
Table 9
: Modbus Serial Link/RTU Settings
Configure the Modbus serial link settings as follows:
1.
Click the icon next to the
SerialModbusSettings
attribute folder to
expand it. All configurable elements will
appear below, along with
element
text to
change
in the right column (
2.
Click the
element
text to change
to
highlight
and edit as required (
3.
Do not enable the Ethernet Modbus in the
TCPModbusSettings
attribute folder.
4.
Once editing of the file is complete, update
the
configuration version
,
date
, and
author
. Use the XML or text editor
‘Save
As’ option to re
-name the file to the
updated version number
Attribute
Folder
Element text to change
