Industrial
Electronic Devices
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User Manual
BACnet Slave / Modbus Master
Document code: MN67671_ENG Revision 1.100 Page 27 of 34
SET BACNET ACCESS:
By Pressing the “
Set BACnet Access
” button from the main window for SW67671 (Fig. 2) the window “BACnet Set Access” appears (Fig. 5).
The window is divided in two parts, the
“
BACnet in Read
” that contains the BACnet
objects readable by a BACnet Master (the
Modbus registers/status associated to these
objects are read by Modbus master); and
“
BACnet in Write
” that contains the BACnet
objects writeable by a BACnet Master (the
Modbus registers associated to these objects
are written by Modbus Master).
The meaning of the fields in the window are
the follows:
In the field “
Data Type
” it is possible
to select the BACnet object data type;
In the field “
Eng. Unit
”, with double
click the window “
Select the BACnet
Engineering Unit
” appears (Fig. 6);
In the field “
Position
” it is possible to
select the position (byte) where
taking/saving the data from/to the
internal arrays of the converter;
The field “
Start Bit
” is used for the
“Binary” BACnet objects and it allows
to select which bit of the selected
Position using;
The field “
Length
” is used to define
the dimension in bytes of the BACnet
Object. For “Binary” Objects, this field
must be set to ‘1’.
Figure 5: “BACnet Set Access” window
