Delta Electronics AC Motor Drive VFD-G - Manual (Page 135)

Chapter 4 Parameters|
4-84 Revision July 2008, EG03, SW V1.06
Content Address Function
2108H Output power (XX.XXKW)
2109H Feedback Signal
210AH Feedback Signal (%)
210BH Estimated torque ratio
210CH User output (Low) uL 0-99.99
210DH User output (High) uH 0-9999
210EH PLC Time
210FH Reserved
3.6 Exception response:
The AC drive is expected to return a normal response after receiving command messages
from the master device. The following depicts the conditions that no normal response is
replied to the master device.
The AC drive does not receive the messages due to a communication error; thus, the AC
drive has no response. The master device will eventually process a timeout condition.
The AC drive receives the messages without a communication error, but cannot handle it,
an exception response will return to the master device and an error message “CExx” will
display on the keypad of AC drive. The xx of “CExx” is a decimal code equal to the
exception code that will describe below.
In the exception response, the most significant bit of the original command code is set to 1,
and an exception code explains the condition that caused the exception is returned. An
example of exception response of command code 06H and exception code 02H:
ASCII mode: RTU mode:
STX ‘:’ ADR 01H
‘0’ CMD 86H ADR 1
ADR 0
‘1’ Exception code 02H
‘8’ CRC CHK Low C3H CMD 1
CMD 0
‘6’ CRC CHK High A1H
‘0’
Error code
‘2’
‘7’ LRC CHK 1
LRC CHK 0
‘7’
CR END 1
END 0
LF