72
Example below shows abnormal response for communication command 06H and abnormal code 02H, in which the
highest byte of 06H is set to 1 thus, it becomes into 86H.
ASC
Ⅱ
Mode:
STX
‘:’
ADR1
‘0’
ADR0
‘1’
CMD 1
‘8’
CMD 0
‘6’
Abnormal code
‘0’
‘2’
LRC CHK 1
‘7’
LRC CHK 0
‘7’
END 1
CR
END 0
LF
RTU Mode
ADR
01H
CMD
86H
Abnormal code
02H
CRC CHK Low
C3H
CRC CHK High
A1H
Meaning of abnormal code is shown below:
Abnormal code
Meaning
1
Unavailable command
code
In command signals, command code received is unavailable to
drive the AC motor inverter.
2
Unavailable data address
In command signals, data address received is unavailable to drive
the AC motor inverter.
3
Unavailable data value
In command signals, data value is not within allowable range.
4
Command unavailable
Required action cannot be performed by AC motor inverter.
■ No signals are received by inverter, but a communications error was detected, thus no signals feedback, but a
fault signal “CE xx” shall be displayed on control keypad. It shall be finally treated with timeout status by the
master device. ‘xx” is a decimal fault code, which is explained in detail below:
Error code
Meaning
5
Reserved
6
Intervals between commands too short. At least 10ms interval must be provided between two
available commands. If no command feedback, this interval shall also be kept.
7
Reserved
8
Reserved
9
Check sum error: to check that check sum is correct.
10
Time-out(Only for ASC
Ⅱ
Mode )
Apart from no check on time out limit, time intervals between characters shall not exceed
500ms.
11
Format error:Check that communications baud rate complies with data format.
12
Command information too short
13
Command information length is not within specified range.
14
Apart from characters of START and END, command information also includes ASC
Ⅱ
data
which is non “0” to “9” or “A” to ”F”.(Only for Modbus ASC
Ⅱ
mode)
