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Modbus Master and Slave Configuration on SCADAPack

By NFM Consulting 1 min read

Key Takeaway

How to configure SCADAPack as a Modbus RTU master and slave — serial port settings, register mapping, function codes, and multi-device polling.

Quick Answer

SCADAPack supports simultaneous Modbus RTU master (polling field devices) and slave (serving data to SCADA) on separate serial ports. Modbus TCP is available on Ethernet-equipped models. Configure in Telepace Studio's Communications section.

Modbus Master

Configure polling sequences to read registers from field instruments (flow computers, analyzers, smart transmitters) on RS-485. Set slave address, register range, poll rate, and timeout per device.

Modbus Slave

Configure the SCADAPack slave address for SCADA master access. SCADAPack registers map directly to Modbus holding registers.

Simultaneous Operation

SCADAPack can be a DNP3 outstation on one port and Modbus master on another — polling field devices via Modbus while reporting to SCADA via DNP3.

For SCADA-side configuration, see Geo SCADA Modbus setup and IDEC Modbus RTU configuration.

Frequently Asked Questions

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