Cleveland Range inverter manual MODBUS-RTUCommunication, Negative Acknowledge Response, Error Code

Chapter 5 - MODBUS-RTU Communication

Negative Acknowledge Response

NAK	Drive No.	CMD	Error Code	SUM	EOT
15h	“01” ~ “1F”	“X”	“**”	“XX”	04h
1 byte	2 bytes	1 byte	2 bytes	2 bytes	1 byte

Total byte = 9 bytes

Action Request for Monitor Registration: Request for read of address registered by monitor registration.

ENQ

Drive No.

CMD

SUM

EOT

05h

“01” ~ “1F”

“Y”

“XX”

04h

1 byte

2 bytes

1 byte

2 bytes

1 byte

Total byte = 7 bytes

Acknowledge Response

ACK

Drive

CMD

Data

SUM

EOT

06h

“01” ~

“Y”

“XXXX

“XX”

04h

1 byte

2 bytes

1 byte

n * 4

2 bytes

1 byte

Total byte= 7 + n * 4 = max. 39 bytes

Negative Acknowledge Response

NAK

Drive

CMD

Error

SUM

EOT

15h

“01” ~

“Y”

“**”

“XX”

04h

1 byte

2 bytes

1 byte

2 bytes

2 bytes

1 byte

Total byte = 9 bytes

Error Code

Error Code

Description

SE

Sum Error

FE

Frame Error

FC

Frame Error (Command): Not in use

FS

Frame Error (Size)

EE

Parameter EEP Access Error

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