ModbusTcpSlaveDevice

The ModbusTcpSlaveDevice represents a virtual Modbus device to serve data to a Modbus master over a TCP connection, where station data appears as Modbus data items. It has 4 frozen range containers (ModbusRegisterRangeTables), which specify what Modbus addresses are available as coils, inputs, holding registers, and input registers.

Its Points extension (ModbusServerPointDeviceExt) contains Modbus proxy points with server proxy extensions (ModbusServerBooleanProxyExt, ModbusServerNumericProxyExt, ModbusServerRegisterBitProxyExt), used to read and write data to the defined data items. The device can also contain one or more ModbusServerStringRecord components.

Figure 31. ModbusTcpSlaveDevice property sheet

You can access these properties by expanding Driver > ModbusSlaveNetwork and double-clicking the ModbusSlaveDevice.

Property	Value	Description
Status	read-only	Indicates the condition of the network, device or component at the last check. `{ok}` indicates that the component is licensed and polling successfully. `{down}` indicates that the last check was unsuccessful, perhaps because of an incorrect property, or possibly loss of network connection. `{disabled}` indicates that the `Enable` property is set to `false`. `{fault}` indicates another problem. Refer to `Fault Cause` for more information.
Enabled	`true` or `false` (defaults to `true`)	Activates (`true`) and deactivates (`false`) the object (network, device, point, component, table, schedule, descriptor, etc.).
Fault Cause	read-only	Indicates the reason why a system object (network, device, component, extension, etc.) is not working properly (in fault). This property is empty unless a fault exists.
Health	text	Health contains historical properties about the relative health of the network in the station, including historical timestamps.
Alarm Source Info	additional properties	Contains a set of properties for configuring and routing alarms when this component is the alarm source.
Device Address	number from 1 to 247	Defines the unique number that identifies the current device object on the network.
Modbus Config	additional properties	Refer to Modbus Config.
Valid Coils Range	additional properties	Refer to ValidCoilsRange.
Valid Status Range	additional properties	Refer to ValidCoilsRange for properties.
Valid Holding Registers Range	additional properties	Refer to ValidCoilsRange for properties.
Valid Input Registers Range	additional properties	Refer to ValidCoilsRange for properties.
Points	additional properties	Provides a container for proxy points.

ModbusTcpSlaveDevice

Figure 31. ModbusTcpSlaveDevice property sheet

Related Links