Data Format - IMO VXSM75-1 Instruction Manual

9-4-12 Data format

The data format of each piece of function code
data of the inverter is defined here.
Prepare data according to the format numbered
in the data format for each function code. (Refer
to section 5-1 Function Setting List and section
9-4-11 Function Code List for the data format.)
The data field of the transmission frame except
for data format 10 consists of a 4-digit ASCII
code converted from a 4-digit hexadecimal data
as shown in the figure below. For details of each
format, refer to the following data formats (1)
through (11).
15 14 13 12 11 10
4-digit hexadecimal data => 4-digit ASCII code
(1) Data format 0
16-bit binary code, least increment 1, positive
value only.
Example) In the case that F15: (frequency
limiter, upper limit) = 60 Hz
60 x 1 = 60 (dec.) = 003C (hex.), hence: 003C
➾
0 0 3
(2) Data format 1
16-bit binary code,
positive/negative value
The negative value is expressed in 2's
complement. -1 -> FFFF (hex.)
Example: In the case that F18: (bias frequency)
= -20 Hz
-20 x 1 = -20 (dec.) = FFEC (hex.), hence: FFEC
➾
F F E
(3) Data format 2
16-bit binary code, least increment 0.1, positive
value only
Example) In the case that F17: (gain frequency
setting signal) = 100.0%
100.0 x 10 = 1000 (dec.) = 03E8 (hex.), hence:
03E8
➾
0 3 E
Specifications
9 8 7 6 5
C
least increment 1,
C
8
4 3 2 1 0
(4) Data format 3
16-bit binary code, least increment 0.1,
positive/negative value
The negative value is expressed in 2's
complement. -1¡ FFFF (hex.)
Example: In the case that C31: (analog input
offset adjustment, terminal 12) = -5.0%
-5.0 x 10 = -50 (dec.) = FFCE (2's complement)
F F C
➾
(5) Data format 4
16-bit binary code, least increment 0.01,
positive value only
Example) In the case that C05: (multistep
frequency 1) = 50.25 Hz
50.25 x 100 = 5025 (dec.) = 13A1 (hex.), hence:
13A1
1 3 A
➾
(6) Data format 5
16-bit binary code, least increment 0.01,
positive/negative value
The negative data is expressed in 2's
complement. -1 -> FFFF (hex.)
Example: In the case that M07: (actual torque) =
-85.38%
-85.38 x 100 = -8538 (dec.) = DEA6
(hex.), hence: DEA6
➾
D E A
E
1
6
9-24