WEG MVW3000 A0040 V023, Руководство пользователя

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9-22 | MVW3000
9
Communication Networks
9-22 | MVW3000
Parameters of the Last Errors
The registers with the information of the last ten errors (register 14, ..., 17, 60, ..., 65) have three words associated
to each of them.
The first read word brings the information of the occurred error number and of the inverter status at the moment
it occurred. The information is distributed among the word bits in the following way:
Status Error number
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
The second and the third words bring the information of the date/time when the error happened. The date/time
information has 32 bits and two words are necessary to represent it. In order to decode the date/time information,
refer to the
Item 9.2.1 Protocol Definitions on page 9-15 .
For instance, in order to obtain the information of the last error (registrador 14 = read P0014 three consecutive
times.
Date and Time Parameters.
The MVW3000 inverter has a real time clock with the purpose of recording date and time of events as, for instance,
the occurred errors. Date and time can be adjusted through the parameters P0080 and P0081, respectively.
NOTE!
Date and time can only be modified through the local HMI.
Despite having two parameters related with the date and hour, the information is stored in a single 32-bit variable.
Thus, to obtain the inverter date and time information, two readings of P0080 are necessary, since the information
is stored in 32 bits, i.e., in two words.
In the first reading the inverter sends the most significant word (bits 16 to 31) and in the second reading the less
significant word (bits 0 to 15).
Those 32 bits of information contain the counting of the seconds elapsed since 00:00 a.m. of January 1
st
, 1970.
A Julian codifying routine must be used to determine the date and the hour correspondent the this counting.
Error Log Parameter.
The parameter P0067 has the information of the 100 last inverter errors. Since each error has 3 words (48 bits) of
associated information, this parameter has 300 words.
Therefore, the first three readings of P067 supply the information of the last error, the three following readings of
the next one, and so on until 300 readings are done. For information on the words related to an error, refer to the
Item 9.2.1 Protocol Definitions on page 9-15 .
Trace Function Data Parameters.
The trace function stores an enormous amount of information in each of its channels. To get access to this data,
it is necessary to read the parameter related to the wanted channel (P0555, P0557, P0559, P0561, P0563,
P0565, P0567, P0569).
When the first reading of a certain channel parameter is done, it responds with the number of the corresponding
parameter programmed for trace.
Starting from the second reading on (in sequence), the information recorded by the trace function is sent.
In order to know how many words are associated to each channel, refer to the
Section 8.1 LOAD SHARE
FUNCTION “MASTER/SLAVE” on page 8-1 .
Times for Telegram Reading/Writing.