Eq5 ac drive operations manual – HP Anab EQ5 User Manual
Page 125
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EQ5 AC Drive Operations Manual
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TECO – Westinghouse Motor Company Communications Errors 119
Data format [20] Transmission error code:
Code
Description
Code
Description
1
FC (function code) error
71
CRC error
(no response)
2
Illegal address
72
Parity error
(no response)
3
Illegal address (Data range error)
73
Other errors
(no response)
-Framing error
-Overrun error
-Buffer full error
7
NAK
-Priority for comm.
-No privilege for writing error
-Forbidden writing error
Data format [21] Auto tuning:
15
14
13
12
11
10 9 8 7 6 5 4 3 2 1 0
0 0 0 0 0 0
REV
FWD
Data
portion
0: Without forward rotation command
1: With forward rotation command.
0: Without reverse rotation command.
1: With reverse rotation command.
Example: P04 (motor 1 auto - tuning)=1: Forward rotation
0000 0001 0000 0001
b
=0101
H
8-4-8 Communication Errors (Exception Response)
When the inverter receives a message that does not contain communication errors but the message
can not be processed, the inverter 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
Causes
1
Illegal Function
Received RTU Function other than 03, 06 or 16
2
Illegal Data Address
• The starting parameter address is an unused inverter parameter.
• The starting parameter address plus the offset refers to inverter
parameter greater than the last parameter in a Function Code
sort.
• The number of registers is greater than 16.
3
Illegal Data Value
Data contains an out of range value for an inverter parameter
7
Negative
Acknowledge
• Requested data cannot be changed while the inverter is running.
• The inverter parameter function is owned by the network interface
option card and cannot be changed.
Communication errors:
Communication errors occur when the inverter receives an invalid message. The inverter will not
return a response to a communication error. A code that represents the last communication error is
stored in inverter parameter M26. Typical communication message errors include parity, framing, and
CRC errors.