9410 series Communications
See your device’s Modbus map, available from www.usa.siemens.com/pds for Modbus
register information.
Your meter as a Modbus master
Your meter as a Modbus master with serial Modbus slave devices
Your meter can function as a Modbus master with serial Modbus slave devices.
A. Ethernet
B. Your meter
C. RS-485 Modbus RTU
D. Modbus slaves
Your meter as a Modbus master with Ethernet Modbus slave devices
Your meter can function as a Modbus master with Ethernet Modbus slave devices.
A. Ethernet
B. Your meter
C. Modbus slaves
Modbus master best practices
In order for your meter to operate as a Modbus master, you must complete some
prerequisite configuration.
NOTE: These settings are required in addition to the serial or Ethernet Modbus
prerequisites.
Prerequisite Description
Modbus slave
devices
All Modbus slave devices must be communicating and appropriately configured.
Protocol • Modbus mastering serial devices: the master’s serial port protocol must be set
to Modbus master.
• Modbus mastering Ethernet devices: the master must be communicating to
the slave devices over Ethernet port 502.
NOTE: Having more than one Modbus master on a serial Modbus network
may cause communication conflicts.
Mastered devices The Modbus master device must have the slave device information entered for
mastering.
Configuring your meter as a Modbus master using ION Setup
You can configure your device to Modbus master slave devices over serial or Ethernet.
Make sure your master and slave devices have the prerequisite communications
wiring and configuration before configuring your meter as a Modbus master.
74 7EN05-0336-03
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