6–4 P485 MODBUS TO PROFIBUS CONVERTER – USER GUIDE
FRAME AND COMMAND EDITORS
It is not possible to alter the contents of columns 1, 2 and 4, as these are pre-defined
commands. However, on column 3 there are two possible actions: Insert Column and
Delete Column. These actions are available in the Columns menu.
Column 3 in the Command Editor is where objects can be added for custom commands.
Supported objects are Byte, Word, DWord, Data and Error Check. In this Modbus example it
makes no sense to add an Error Check object since it is already incorporated in the
standard frame but all other objects could be added in any way.
The “response” field (E) is defined much in the same way as the “query”, with the difference
that a “response” can depend on what is entered in the “query”
If ‘Depend’ is selected then this object in the “response” will get the same setting as the
corresponding object in the “query”, furthermore the object will appear as non-editable in
the parameter window (see below).
Figure 6-5: Main window
Query Column
1: Slave Address. 2: Modbus Function Code 3: See below 4: Error Check field.
DisplayName Slave Address Function Data Checksum
See Query See Query See Query See Query
Object Type Byte Byte Data Checksum
See Query See Query See Query See Query
Value [SlaveAddress] ID User Depend
See Query See Query See Query Object has same setting
as the corresponding
Query object. It also will
appear as non-editable in
the parameter window
(see below)
