8.2
Telegram check
The frequency inverter and the bus Master check the telegrams for correctness. Depending on the
type of telegram, the corresponding reaction takes place. The telegrams are checked for correct
syntax, address and text part (content, checksum).
In case the telegram contains errors, the frequency inverter either returns NAK or it does not re-
spond at all. The possible causes are listed below:
no response
wrong telegram structure
wrong control character
wrong address
telegram addressed to address 32 (Broadcast); in this case, the frequency
inverter does not reply.
If an error occurs during parameter access, the frequency inverter will return an error message (Bit
E = “1” in read/write response). Bytes 6 and 7 contain the error code.
VABus SST-Error-Register
11
Error no.
Meaning
0
no error
1
Non-permissible parameter value.
2
Non-permissible dataset
3
parameter not readable (write-only)
4
parameter not writable (read-only)
5
EEPROM read error
6
EEPROM write error
7
EEPROM checksum error
8
Parameter cannot be written while drive is running
9
Values of data sets are different
10
not available
11
unknown parameter
12
not available
13
Syntax error in received telegram
14
data type of parameter does not correspond to the number of bytes in the telegram
15
unknown error
20
selected System Bus node not available
30
Syntax error in received telegram
40
Agile
VABus/TCP
12/13
Summary of Contents for Agile VABus/TCP
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