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rio900ns:rtu

# Modbus RTU

These parameters are related to accessing IP100 Internal Registers via modbus.

### Global

Global parameters apply to modbus slave connection types: Modbus IP Slave, Modbus Serial Slave, IP Mux, and Serial Mux.

Enable RTU | This checkbox must be clicked to take effect. If selected the modbus connections will have RTU mode enabled. If unselected the modbus connections will have RTU mode disabled. The RTU enable checkboxes on the modbus forms show this and can be used to override this individually.
Set RTU ID | When this button is clicked the RTU ID in the modbus forms will be set to the spinner value. This must be in the range 1..247.

### I/O Bus

I/O Bus parameters are used to describe the modules that are on the I/O bus. If the I/O bus does not have these modules installed as listed then at run-time the alarm light is asserted. The Device > I/O Bus menu item can be used to view the actual run-time configuration.

Enable I/O Bus Alarm | If checked the alarm LED will be asserted if the actual modules on the bus are different than in the list. If checked and a listed I/O module is not detected the IP100 will reset.
Pos | Physical location of the module on the I/O bus in the range 1..8.
Mod | Module number in the range 1..8.
Type | Module type. Must be one of DI8, DO8, AI4, AO4, PI4, or blank. If A8D4 is selected from the list then it is replaced with five consecutive modules: AI4, AI4, DI8, DO8, and PI4 and the module numbers are set to be five consecutive values.

rio900ns/rtu.txt · Last modified: 2021/08/19 14:22 by

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