Delta Electronics VFD-G manual ASCII mode, RTU mode

Chapter 4 Parameters

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

3.6Exception 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:

STX	‘:’
ADR 1	‘0’
ADR 0	‘1’
CMD 1	‘8’
CMD 0	‘6’
Error code	‘0’
	‘2’
LRC CHK 1	‘7’
LRC CHK 0	‘7’
END 1	CR
END 0	LF

RTU mode:

ADR	01H
CMD	86H
Exception code	02H
CRC CHK Low	C3H
CRC CHK High	A1H

4-84 Revision July 2008, EG03, SW V1.06