Function Codes
Click on this button to attach or detach function codes to a device type. You will need the device’s Modbus RTU protocol specification to know the correct codes to add for the new device type.
Clicking this button displays the Modbus Function Codes dialog box:
The two list boxes, Available Function Codes and Selected Function Codes, are multiple-selection list boxes. The Available Function Codes box lists the function codes available to any generic device type; the Selected Function Codes box lists those function codes that are to be assigned to a specific device type. Place the desired function codes into the Selected Function Codes box using the Add and Delete buttons, then click OK.
Select the function codes to be added from the Available Function Codes list box and click this button. The selected function codes are added for the device type and displayed in the Selected Function Codes list box.
This button is displayed only when there are no user-configured register groups for the device type. To remove a function code support from the device type, all the register groups that are added are removed. (To delete a register group from the device type, refer to Delete under the Register Map subsection.) Select the function codes to be deleted from the Selected Function Codes list box and click this button. The selected function codes are deleted for the device type and displayed in the Available Function Codes list box.
68 • Chapter Six - Advanced Options | DDE Server User’s Guide |