ESD electronic CAN-CBM-PLC/331-1, Hardware Manual

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Commands and Parameters
esd Protocol for CAN Modules Rev. 3.2 3 - 20
Parameter 1 and 2... With these parameters it is reported to the module at a request command onto
which CAN Id (CTxId) it should transmit the requested reply.
The module only transmits once on this identifier. The identifier is not stored on the
module. If another transmission is wanted, another INIT Id with the corresponding
parameters has to be transmitted to the module again.
At a set command the 11 bit wide Tx identifier on which it should transmit the data
is interchanged to the module by the parameters.
By the sub command it is selected which one of the possible Tx identifiers should be
set or reset:
Sub
command
Tx identifiers on
parameters 1 and 2
$00
$01
$02
:
n
TxId1
TxId2
TxId3
:
TxId(n+1)
Table 3.3.2:
Selection of the identifiers by the sub command
The following table shows how the bits of Tx identifiers have to be allocated to the
bytes 5 and 6:
Byte 5 Byte 6
Parameter 1 Parameter 2
Bits in
byte
5 and 6
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
TxId-H TxId-L
Bits of
the TxId
- - - - - id11 id10 id9 id8 id7 id6 id5 id4 id3 id2 id1
(-) These bits are not evaluated.
Table 3.3.3:
Bits of the Tx identifiers in byte 5 and byte 6