Chapter 4 - Data Communications Definitions
© 2017 Siemens Protection Devices Limited
Chapter 4 - Page 35 of 96
4. MODBUS Definitions
4.1 Introduction
This section describes the MODBUS-RTU protocol implementation in the relays. This protocol is used for
communication with a suitable control system.
This protocol can be set to use any or all of the relays hardware interfaces (USB, Fibre Optic, RS232 and RS485)
where fitted. The relay can communicate simultaneously on all ports regardless of protocol used.
The Station Address of the port being used must be set to a suitable address within the range 1 - 247 to enable
communication. This can be set by the
Communications Menu : COM
n-xxxxx
Station Address
setting.
Communication via MODBUS over Ethernet requires external devices. Please refer to the documents
TCPIP
Catalogue Sheet
and
TCPIP Interface Technical Guidance Notes
for more information.
Definitions with shaded area are not available on all relay models.
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
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