User's Manual

Bit 4 : CR/LF addition/deletion

(1) Setting at the headerless stream mode

does not add CR/LF code to the received data (default value)

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

adds the CR/LF to the received data (default value)

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

No C/R code output for collision avoidance (default value)

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.