Delta Electronics VFD-F Series manual CRC CHK High, 5-58

VFD-F Series

Content

Address

2102H

2103H

2104H

2105H

2106H

2107H

2108H

2109H

210AH

210BH

210CH

210DH

210EH

220FH

Function

Frequency command (F) Output frequency (H) Output current (AXXX.X) DC-BUS Voltage (UXXX.X) Output voltage (EXXX.X) Output power factor (n) Output power (XX. XXKW) Feedback signal actual value Feedback signal (XXX.XX %) Estimated torque ratio (XXX.X)

User Target Value (Low bit) uL 0-99.99 User Target Value (High bit) uH 0-9999 PLC time

Reserved

3.6 Exception response

The AC motor drive is expected to return a normal response after receiving command messages from the master device. The following depicts the conditions when no normal response is replied to the master device.

The AC motor drive does not receive the messages due to a communication error; thus, the AC motor drive has no response. The master device will eventually process a timeout condition.

The AC motor drive receives the messages without a communication error, but cannot handle them. An exception response will be returned to the master device and an error message “CExx” will be displayed on the keypad of AC motor drive. The xx of “CExx” is a decimal code equal to the exception code that is described below.

In the exception response, the most significant bit of the original command code is set to 1, and an exception code which explains the condition that caused the exception is returned.

Example of an exception response of command code 06H and exception code 02H:

ASCII mode

STX	‘:’
Address	‘0’
	‘1’
Function	‘8’
	‘6’
Exception code	‘0’
	‘2’
LRC CHK	‘7’
	‘7’
END	CR
	LF

RTU mode

Address	01H
Function	86H
Exception code	02H
CRC CHK Low	C3H
CRC CHK High	A1H

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