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MODBUS
RS485/RS232 Communications Interface
!3 : Save Command
Write-only: used to save the configuration and product code in non-volatile memory.
HEX Value Description
0000
Reset Command. Acknowledges (clears) any previous save error.
0001
Saves Configuration to drive’s non-volatile memory.
0100
Saves Product Code to drive’s non-volatile memory.
!4 : Save State
Read only: used to determine the progress of a non-volatile saving operation.
HEX Value Description
0000 Idle
0001 Saving
0002 Failed
3. Tag Access
Each parameter is directly mapped to four MODBUS registers: two of these represent it as a
single data bit, and the other two represent it as a 16-bit signal or unsigned data word.
This allows a parameter to be read and written using the MODBUS bit functions (01, 02, 05 and
15) or word functions (03, 04, 06 and 16).
For example, the parameter with Tag 65 in the drive is mapped to register:
Bit Functions
{0}0065
as a COIL STATUS REGISTER for access using functions :
(01, 05, 15)
{1}0065
as an INPUT STATUS REGISTER for access using function
:
(02)
Word Functions
{4}0065
as a HOLDING REGISTER for access using functions :
(03, 06, 16)
{3}0065
as an INPUT REGISTER for access using function :
(04)
4. Encoding
Reading a parameter which is not of type BOOLEAN using a bit function (01 or 02) will return
1 if the value is non-zero. Writing to parameter which is not of type BOOLEAN using a bit
function (05 or 15) will set the value to either 0 or 1 if the limits of the parameter allow this.
5.
Reading parameter attributes
This feature is available in version 5.x onwards.
The following parameter attributes may be read by adding a corresponding offset to the
parameter tag number as shown.
Offset
Modbus register range
Attribute
0
0 to 1999
Parameter value
2000
2000 to 3999
Minimum value
4000
4000 to 5999
Maximum value
6000
6000 to 7999
Data type and write qualifier
The data types are reported in the bottom 8 bits of the returned value. The write qualifiers are
returned in the upper 8 bits of the returned value.
Summary of Contents for 6513
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