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  • ABB DSMB 125  Automation module
ABB DSMB 125  Automation module

ABB DSMB 125 Automation module

ABB DSMB 125  Automation module

Modbus Slave Message Configuration This panel lists all of the messages for the Slave device in the order that the Modbus Master executes them. Dragging and dropping a highlighted message anywhere in the list can be used to change the order of the messages in the list. To create a message to send to this Slave, click ‘New’. (‘Insert’ adds a new message at the cursor position, ‘New’ adds at the end).Select a Message Type from the list. Depending on the address range and the number of addresses, the appropriate Modbus command is used. The supported commands are shown below.

Modbus Message Types

 The Variable Network Address is the Modbus address range of the variables as mapped in the Trusted System. Only the starting address is needed; the end address is calculated automatically. The Modbus Slave Address is the Slave’s address range for the variables. Enter the start and end addresses. The available address ranges and maximum number of addresses in a single message are shown above. If message control is required, select ‘Application Controls Message’ and enter the Modbus address of an application variable that will be used to control the message. Where a control register is defined for either a broadcast or Slave message, the message is enabled when the register contains a zero value. All other values will result in the message being disabled. The data type used for control variable can be either Boolean or integer but not real.

Modbus Slave Statistics Configuration 

The statistical data records the time taken for a complete slave poll to be completed. The data is then reported to the application using a defined Modbus data variable. The value returned is an integer which represents the poll time in 1/100th second. There are three statistical values that may be returned: the maximum scan time (‘Max Scan Rate’), the average scan time (‘Average’) or the latest scan time (‘Scan Rate’). The statistics may be reset using the control variable.

                                        

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