ABB DSDX B001 industrial module

To enable scan time statistics, select ‘Report Statistics’. Enter the Modbus address of an application variable which will be used to send the data to the application in the ‘Data’ field. Select the Statistics Type as appropriate. Depending on the Statistics Type, the variable with the address defined in ‘Control’ has the function described below. The variable may be Boolean or integer. For Max Scan Rate and Average, a falling and rising edge sequence will restart the measurement Max value will remain until next cycle completed. Max value then updated with time of next complete cycle.

Trusted Communications Interface

The Master poll scan is defined as the time taken to poll all of the Slaves defined for the Master. The first Slave defined in the poll list is taken as the start and end point of the timing sequence. This is illustrated in the diagram in Figure 10.

The Configuration tab for a Modbus Slave includes the communications settings and controls for the Slave. • Station ID: The station ID is the Modbus communications identity for the Slave device. This value must be unique for all Slaves connected to a single Master device. For Ethernet based Slaves, only single point-to-point communications is possible. In this case an ID of 1 is usually used.

Modbus Slave Configuration 

To add a Slave to a Modbus Master, click on the appropriate Master on the left hand tree window. Create a new Modbus Slave by clicking ‘+ Add Slave’. This enables the controls to remove the Slave. The three configuration tabs (Configuration, Messages and Statistics) are now available for the new Slave. The slave name can be changed by double clicking on the name or clicking on ‘Change Name’. ‘Save’ stores changes made so far, and ‘Undo’ loads the last saved state. ‘Validate’ will check the settings for any obvious errors and omissions (but will not guarantee it will work).

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