SENA PS810 - Manual (Page 64)

64
 Flow control
The factory default setting of the flow control is None. Software Flow Control using XON/XOFF and
hardware flow control using RTS/CTS are supported by the Pro Series.
Software flow control method controls data communication flow by sending special characters
XON/XOFF (0x11/0x13) between two connected devices. And hardware flow control method controls
data communication flow by sending signals back and forth between two connected devices.
Note: Flow control is supported only in RS232 and RS422 mode. RS485 mode does not support any
kind of flow control method.
 Inter-character timeout
This parameter defines the interval the Pro Series fetches the overall serial data from its internal buffer.
If there is an incoming data through the serial port, the Pro Series stores data into the internal buffer.
The Pro Series transfers data stored in the buffer via TCP/IP, only if the internal buffer is full or if the
inter-character time interval reaches the time specified in the inter-character timeout setting. If inter-
character timeout is set as 0, then data stored in the internal buffer will be transferred immediately
without any delay.
Optimal inter-character timeout would be different according to your application but at least it must be
larger than one character interval within specified baud rate. For example, assume that the serial port
is set to 1200 bps, 8 Data bits, 1 stop bit, and no parity. In this case, the total number of bits to send a
character is 10 bits and the time required to transfer one character is
10 (bits) / 1200 (bits/s) * 1000 (ms/s) = 8.3 ms.
Therefore, you have to set inter-character timeout to be larger than 8.3 ms. The inter-character
timeout is specified in milliseconds.
Figure 4-16 Serial parameter configuration (PS110/410)