User`s guide

177
CHAPTER 8 - CFW-08 OPTIONS AND ACCESSORIES
SCHEMATIC DIAGRAM:
INVERTER
BASIC
VARIABLES
PARAMETERS
MASTER
SERIALCONNECTION
VARIABLES
8.24.3.2
Parameter/
Variables
Resolution
1 start bit;
8
information
bits [
they codify text characters and
transmission characters, removed from the 7 bits code,
according to ISO 646and complementedfortheeven parity
(eighth bit)];
1 stop bit.
After the start bit, follows the less significant bit:
8.24.3.3
Character
Format
Unit
Hz
A
V
s
%
-
rpm
Resolution
0.01 Hz/unit
0.01 A/unit
1 V/unit
0.1 s/unit
0.01 %/unit
0.01/unit
1 rpm/unit
Variable
Frequency
Current
(AC or DC)
Voltage
(AC or DC)
Time
Percentage
Gain
rpm
The variables and the parameters have 16 bits format, i. e.,
from -32767 to +32768for signed variables or from 0 to65535
for unsigned variables.
All variables are considered as signed variables,except those
related to time (time, period, frequency).
Inaddition, the maximum and minimum values mustconsider
the parameter range limits.
Thetablebelow shows the mainvariables and their respective
resolutions.
START
B1
B2
B3
B4
B5
B6
B7
B8
STOP
Start
bit
Stop
bit
8 bits of information
8.24.3.4
Protocol
The transmission protocol meets the Standard ISO 1745 for
the transmission in code.
Onlytext character sequences without headers are used. The
error/fault monitoring is made through transmission related to
the parity of the individual 7 bit characters, according to ISO
646. The parity monitoring is made according to DIN 66219
(even parity).The master uses two types of messages:
Basic variables: are those that can be accessed only
through the serial interface.
Table 8.8
- S
erial communication resolutions