Communication Errors - GE AF-300 P11 User Manual

Data format [21] Auto tuning
15 14 13 12
0 0 0 0
Example) If P04 (motor 1 auto - tuning)=1: Forward rotation
0000 0001 0000 0001

12-7 Communication Errors

Exception Response
When the drive receives a message that does not contain communication errors but the message can not be processed,
the drive will return an exception response. The exception response contains an error sub-code in the data field that
represents the problem.
Exception Response Errors
Sub-Code Name
1 Illegal Function
2 Illegal Data Address
3 Illegal Data Value
7 Negative Acknowledge
Communication errors
Communication errors occur when the drive receives an invalid message. The drive will not return a response to a
communication error. A code that represents the last communication error is stored in drive parameter M26. Typical
communication message errors include parity, framing, and CRC errors.
11 10 9 8
0 0 REV FWD
=0101
b H
Causes
Received RTU Function other than 03, 06 or 16
• The starting parameter address is an unused drive parameter..
The starting parameter address plus the offset refers to drive
parameter greater than the last parameter in a Function Code sort.
•
• The number of registers is greater than 16.
Data contains an out of range value for a drive parameter
• Requested data cannot be changed while the drive is running.
The drive parameter function is owned by the network interface
option card and cannot be changed.
•
12-8
7 6 5 4 3
Data portion
0: Without forward rotation command
1: With forward rotation command.
0: Without reverse rotation command.
1: With reverse rotation command.
Data subject to change without notice 7/07. © 2007 GE Drives
2 1 0