ibaLink-VME
Manual
Issue 1.8
23
Coherent mode
(DP1.5)
The coherent mode can be activated here.
Coherent mode means, that data of a processing cycle are transferred in one FO
telegram. To enable coherent data transmission proceed as follows:
After writing to the transmit buffer, the sender has to release the data transfer by
setting the 0xE8.7 bit in the DPR. Copying the transmit buffer takes less than
10 µs, i.e. send requests must not follow each other faster than 10 µs.
In coherent mode the receive buffer in DPR is only updated on user request by
setting the 0xE8.5 bit in the DPR.
See chapter 10.3, Control/Status/Version registers
The consistence within a 16 bit or 32 bit Dword is guaranteed, even when coherent mode
is disabled.
Byte order
(DP1.4 and DP1.2)
Byte order settings are only relevant for 3Mbit (S1 = 0, 1, 8, 9) and certain 32Mbit
P2P modes (S1 = 4, S2 = 0…B). In 32Mbit P2P with S2 = C or D and in 32Mbit Flex
mode (S1 = F) the byte order is configured in ibaPDA.
Data format
(DP1.3 and DP1.1)
Data format settings are only relevant in 3Mbit modes (S1 = 0, 1, 8, 9).
In 32Mbit P2P mode (S1 = 4) the data format is adjusted with the telegram type
(Switch S2).
In 32Mbit Flex mode (S1 = F) the data type is configured in ibaPDA.
Address mode
(DP3.8 and DP3.7)
Address mode
DP3.8
(A24 mode)
DP3.7
(A40 mode)
used address switches
A32 mode
OFF
OFF
A31...A18
A24 mode
ON
OFF
A23…A18
A40 mode
OFF
ON
A39…A18
A64 mode
ON
ON
A39…A18 (specify the
address bits A63…A42)