Page 35= Key 1 = Key 2 = Key 3 = Maximum or consumption = Minimum or supply
Read data sets
The reading of data sets is controlled by the following
addresses:
Read address 19000dez (Index 231).
The first 4 Bytes provide the contents of the ring buffer
pointer.
The next 12 Bytes provide the first data set, which the
pointer points on.
The ring buffer pointer is increased automatically by the
number of read Bytes, but the first four Bytes are not
included.
Write address 19000dez (Index 10).
Set ring buffer pointer on a data set of the ring buffer.
If the ring buffer pointer is overwritten by 0000, it points
on the last read beginning of ring buffer with address
19008dez (Index 235).
Read address 19002dez (Index 232).
Read a number (4 Bytes) of data sets from that address
on, on which the pointer points. The ring buffer pointer
is increased automatically by the number of read Bytes.
The number of read Bytes must be divisible by 12.
Read address 19004dez (Index 233).
Provides that address (4 Bytes), on which the actual
pointer points.
Read address 19006dez (Index 234).
Read a number of data sets, from that address on, on
which the pointer points. The ring buffer pointer is not
increased.
Read address 19008dez (Index 235).
Delivers the number (4 Bytes) of the Bytes saved in ring
buffer. If you divide this number by 12, the result is the
number of the saved data sets.
The ring buffer pointer is set to the last data set in ring
buffer. The contents of this pointer is therefore zero.
Overwrite address 19010dez (Index 11) with 2 Bytes
with a content by choice
New data sets are written into the ring buffer uncom-
pressed. If data were saved before in a compressed form,
the ring buffer will be deleted.
Read address 19010dez (Index 236).
Delivers the storage format of the ring buffer in 2 Bytes.
00=compressed ring buffer
01=uncompressed ring buffer
Overwrite address 19020dez (Index 12) with 2 Bytes
with a content by choice.
New data sets are written into the ring buffer compressed.
If data were saved before in a uncompressed form, the
ring buffer will be deleted.
Overwrite address 19030dez (Index 13) with 2 Bytes
with a content by choice.
The ring buffer will be deleted.
Example 1: Read the last saved data set.
Read adress 19008dez (Index 235). The ring buffer
pointer (0000) is set to the last data set in ring buffer.
Read 12 Bytes from address 19006dez (Index 234). 12
Bytes correspond to one data set. The ring buffer pointer
is not increased.
Example 2: Read all saved data sets.
1.) Read address 19008dez (Index 235). The number of
saved Bytes is read. If you divide the result by 12, the
number corresponds to the saved data sets. The pointer
points to the last saved data set in ring buffer.
2.) Read the content of the Bytes in ring buffer by address
19002dez (Index 232). With the MODBUS-Protocol, at
maximum 240 Bytes=20 data sets can be read per
reading. The number of read Bytes must be divisible by
12.
The ring buffer pointer is increased automatically by the
number of read Bytes and points to the next data set,
which has not been read yet.
3.) Repeat reading of address 19002dez (Index 232) as
long as all data sets have been read.
Attention!
If a failure appeared during data transmission, the
complete procedure must be repeated, starting
with step 1.
Example 3: Read all saved data sets.
1.) Read address 19008dez (Index 235). Reads the num-
ber of saved Bytes in ring buffer. Divided by 12, the num-
ber of saved data sets is the result. The pointer points to
the last saved data set.
2.) Read address 19000dez (Index 231). The first 4 Bytes
refer to the actual address of the pointer. The next 12
Bytes provide the first data set of the ring buffer. With
MODBUS-Protockol you can read 244Bytes (4Byte + 20
data sets) at maximum per reading.
3.) Repeat reading address 19000dez (Index 231) as long
as all data sets have been read.
Attention!
If a failure occured during data transmission, the
last actual address of the ring buffer pointer must
be written on address 19000dez (Index 10) and the
last reading procedure must be repeated.
To Next Page