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Advanced Energy
Table
6-13.
Format for Return Slave
ID
command
Response Information
Response Layout
Modbus
slave
address
llh
Command number
n
Number
of bytes of
data:
xx
Data
1
xx
Data2
xx
Datan
xx
CRCLSB
xx
CRCMSB
xx
MODBUS DATA TYPES
Modbus
data
types
used
with
the
AE
unit are
shown
in the
following table.
Table
6-14.
Data types
Data Type
Description
ASCII
Two
ASCII
characters per register
For
a: text string the left-most
character is
the lowest
register
number.
UINT
Unsigned
integer,
16
bits
Range: 0 to 65,536
SINT
Signed
integer,
16 bits
Range:
-
32,767
to
+32,767
UINT32
(requires two
Unsigned
integer,
32 bits
registers)
Range: 0 to 4,294,967,295
High
order
16
bits
in the first
of the two
registers.
Low order
16
bits
in the second register.
(Big Endian)
SINT32 (requires two
Signed
integer,
32
bits
registers)
Range:
-
2,147,483 ,647 to +2,147,483 ,647
High
order
16
bits
in the first
of the two
registers.
Low order
16
bits
in the second register.
(Big Endian)
FLOAT
(requires
two
IEEE
754 standard
32-bit
floating
point number
registers)
High
order
16
bits
in the first
of
the
two
registers.
Low order
16
bits
in the second register.
(Big Endian)
6-22
Data Monitoring
and
Controls
570-1001793-0SB
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