Hexadecimal format is used to display protocol data bytes. Use the MODBUSDIAG command to filter Modbus protocol diagnostics when you are in a diagnostic display session and the rPAC or RTU is operating as a Modbus RTU Master or a Modbus/TCP Client.Ī Modbus RTU Master communicates with a Modbus RTU Slave using the Modbus RTU protocol over a serial port.Ī Modbus/TCP Client communicates with a Modbus/TCP Server using the Modbus/TCP protocol over an Ethernet port, or using PPP/TCPIP over a serial port. The example below will use “CMD Line” port mode. The Diagnostic Command Line Interface can only be accessed via Telnet or a serial port configured as “CMD Line”. In cases where there might be a challenge communicating to a slave device, the Command line Interface and MODBUSDIAG may be used to troubleshoot the Modbus communication protocol. With the introduction of the Modbus Scanner in E-Series Utilities 8.12.4, the SCADAPack E is able to be a Modbus Master for Modbus RTU or Modbus/TCP Client protocols.
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