Modbus
Description
This action is used to send Modbus commands to the Modbus server. If coils are read, then the read value will be passed through output values as a value of type array:boolean, and in the case of registers, then a value of type array:integer will be passed through output values.
Properties
Specific
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Connection
EXPRESSION (any)
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Serial connection used to send Modbus commands.
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Server address
EXPRESSION (integer)
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A number between 0 and 255 used to select the Modbus server on the serial connection.
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Command
Enum
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Command to be sent:
- 01 (0x01) Read Coils
- 02 (0x02) Read Discrete Inputs
- 03 (0x03) Read Holding Registers
- 04 (0x04) Read Input Registers
- 05 (0x05) Write Single Coil
- 06 (0x06) Write Single Register
- 15 (0x0F) Write Multiple Coils
- 16 (0x10) Write Multiple Registers
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Register address
EXPRESSION (integer)
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Register address for single write: 05 (0x05) Write Single Coil or 06 (0x06) Write Single Register.
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Starting register address
EXPRESSION (integer)
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The address of the first register for multiple read and write.
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Quantity of registers
EXPRESSION (integer)
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The register number for multiple read and write.
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Coil value
EXPRESSION (boolean)
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Coil value (
boolean) that is sent during a single write (i.e. when 05 (0x05) Write Single Coil is used). -
Register value
EXPRESSION (integer)
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Register value (
integer) that is sent during a single write (i.e. when 06 (0x06) Write Single Register is used). -
Coil values
EXPRESSION (array:boolean)
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Coil values (of type
array:boolean) when multiple writes are performing. -
Register values
EXPRESSION (array:integer)
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Registar values (of type
array:integer) when multiple writes are performing. -
Timeout (ms)
EXPRESSION (integer)
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Maximum waiting time for server response. It is set in milliseconds.
General
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Description
String
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This is the description of the Action component. Description is displayed below the component in the Project editor/viewer. In the main toolbar, it is possible to hide or display descriptions of all components with one click.
Flow
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Inputs
Array
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Additional component inputs that the user can add as desired in order to use them to receive additional data needed when evaluating expressions in properties. Each input is given a name and type. Name is used when referencing an input within an expression. A type is used to project Check to check whether a data line that transmits data of that type is connected to the input or not.
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Outputs
Array
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Additional component outputs that the user can add to send data through. Each output is assigned a name and type. An example of using this output is e.g. in the Loop component, where we can put the output name for the
Variableproperty instead of e.g. variable name. In that case, the Loop component will not change the content of the variable in each step, but will send the current value through that output. -
Catch error
Boolean
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If this checkbox is enabled then an
@Erroroutput will be added to the component and if an error occurs in this component during the execution of the Flow, the Flow will continue through that output. The data that will be passed through that output is the textual description of the error.
Position and size
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Align and distribute
Any
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Alignment icons and component distribution. Alignment icons appear when two or more components are selected, and distribution icons appear when three or more components are selected.
Inputs
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seqin
SEQ | OPTIONAL
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A standard sequence input.
Outputs
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seqout
SEQ | OPTIONAL
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A standard sequence output.