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CAN-CBM-DP
Software Manual Rev. 2.0
60
force x
Via this byte you can specify the time when the data of the
Tx-identifier are to be transmitted to the CAN.
force
Function
0
Data is not put out as CAN frame.
1
Data is always (following each PROFIBUS telegram)
put out as CAN frames.
2
Data is only put out as CAN frame if data has changed.
3
Data is only put out as CAN frame once.
4
Data is only put out as CAN frame once.
Table 6.5.5:
Meaning of parameter
force
In order to transmit the CAN frame with the user data
once, parameter
force
has to be set to value ‘3’. If the
parameter is set to ‘3’ again in the following cycle, the
frame will not be transmitted. In order to transmit more
than once
force
has to be set to the value ‘4’ in the
following cycle. Each further switch between the values
triggers a transmission of frames.
userdata x
The user data between 1 to 8 bytes is specified after
parameter
force.
enddata
This parameter tells the PLC whether another data block
with user data will follow, or whether this was the last user
data to be transmitted.
-
If another data block is required, the hexadecimal
value ‘DD’ has to be specified for
length
following the definition of the last user data. FB2
will then continue to handle the following DB.
-
If the last user data of this application has been
specified, FB2 will be told by entering the
hexadecimal value ‘EE’ in cell
length.
FB2 will
then continue to transmit the user data of the first
WRITE_DB
.
Note:
Bit
FREIGABE
has to be set = 1 in FB2, if the output data is to be written!