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Sievers M500e TOC Analyzer
Operation and Maintenance Manual
DLM 78510-02 EN Rev. B
315
SUEZ © 2022
Appendix E: Modbus with the Analyzer
T
HE
E
THERNET
C
ONNECTION
AND
M
ODBUS
This section includes information for using Modbus, an industrial communications
protocol that operates over Ethernet, on the Sievers M500e TOC Analyzer.
Communications require third-party data acquisition software or a SCADA system with
Modbus TCP/IP support. Modbus communications support the collection of real-time
instrument data and status information. The instrument may also be started or stopped
remotely via Modbus.
This section provides a basic overview of implementing Modbus on the Analyzer. This
information is used in conjunction with third-party SCADA or other Modbus data
acquisition software by internal Process Engineering departments. It is difficult to provide
all details as the bulk of the configuration and programming is completed within the third-
party device. Various vendor SCADA systems are programmed differently. As noted in
the following steps, some systems require memory addresses to be formatted in a
unique way, while others label Modbus functions differently.
Enabling Modbus
To enable Modbus
Before exporting data via Ethernet, ensure to configure the Ethernet output in the
“Configuring an Ethernet Connection” on page 157
The connection can be made using DHCP or a static IP address.
Refer to the
“Modbus Register Table” on page 317
, as needed.
NOTE:
Assistance may be needed from internal Process
Engineering departments to set the IP address correctly for the
network.
1. Confirm that an active Ethernet cable is connected to the Analyzer. The
Analyzer uses the Modbus communication protocol (port 502).