GE P485 User Manual

Page 46

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

Object Type

Byte

Data

Checksum

See Query

Value

[SlaveAddress]

User

Depend

See Query

Object has same setting

as the corresponding

Query object. It also will

appear as non-editable in

the parameter window

(see below)