Read jobs

Read Jobs

A Job in the Modbus context is a recurring task that is defined to read data from a Modbus device. This data can then be used for further processing, visualization, or control. A Job defines which data (registers) are read from a Modbus slave device and at what intervals the query should take place.

Steps for creating a new job

1. Click in the -> Modbus connection on to create a new job.

   ▷ A configuration window for the new job opens.

2. Job configuration

   Fill in the following fields in the configuration window:

   • Name: Enter a name for the job that describes the task (e.g., "Read temperature").

   • Function: Select the Modbus function to be used for this job (e.g., "Read holding registers").

     • Typical functions include reading coil registers, input registers, or holding registers.

   • Address: Enter the start address of the registers you want to read. This is the memory address in the Modbus device.

   • Length: Enter the number of registers to be read.

   • Interval: Enter the interval (in seconds) at which the job should query the registers (e.g., every 10 seconds).

3. Save job

   • Click on Save, to create the job.

   • ▷ The new job appears in the list of defined jobs under Read jobs.

---

Examples of typical Modbus jobs

• Temperature monitoring A job that reads the temperature from a specific sensor every 30 seconds.

• Collect power data A job that queries the power data of a generator via holding registers every hour.

---

Make sure that the address and length of the registers are specified correctly to ensure that the correct data is read. Incorrect information can lead to malfunctions or incorrect values.