FUTABA FDL01TU, Instruction Manual

Page: 52 / 83

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Bit 4 : CR/LF addition/deletion
(1) Setting at the headerless stream mode
0
does not add CR/LF code to the received data (default value)
1
adds CR/LF code to the received data
Table 7–6: Addition of CR/LF code
•
In the
headerless stream mode
, setting is made whether the CR/LF character is
added to the received data or not.
•
In the communication between the modems set to the
headerless packet mode
, this
setting is invalid because the terminator is originally added to the transmit data.
However, when a packet is received from the modem in the
packet transmission
mode , there is no addition of the CR/LF terminator . In this case, set this bit to 1.
Then the received packet is output with the CR/LF character is added.
(2) Setting at the packet transmission mode
0
adds the CR/LF to the received data (default value)
1
does not add the CR/LF to the received data
Table 7–7: Deletion of CR/LF character
•
In the packet transmission mode , setting is made whether the CR/LF character is
added to the received data or not.
•
At the receiver modem (set to the packet transmission mode ), the sender (set to the
headerless stream mode
) side
terminator
(CR/LF character as default) plus
packet transmission mode terminator
(CR/LF) are output. To avoid such
redundant outputs, set this bit of the modem in the normal
packet transmission
mode to 1.
Bit 3: reserved
•
The FDL01TU does not use this register. Keep the default value as it is.
Bit 2: RS485 collision avoidance regular interval output
0 No C/R code output for collision avoidance (default value)
1 Regularly output C/R code for collision avoidance
Table 5–23: C/R Code Regular Interval Output
•
Sets whether the
collision avoidance function
is used or not, together with bit 1.
•
When this bit is set to 1,
responses
or data will be output to RS485 line if there are
such responses or data exist in the buffer at the timeout of the RS485 Packet
Interval
(
REG07
). If there are no such
responses
or data exist in the buffer, the
C/R code (0Dh) is compulsorily output.
•
The effective use of this function helps to shift the output timing of multi-dropped
modems on RS485 line. Eventually it avoids the data collision on the RS485 line.