SystemBase Eddy-CPU, User Manual

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Eddy-CPU User Guide
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z
Remote IP Address / Port (Default: 0.0.0.0 / 4000)
When the Operation Mode is either TCP Client or UDP Client, set the IP address and the
socket number to connect to.
z
Alive Check Time (Default: 0 sec)
After a certain amount of time passes without any communication after the socket connection
between the given serial port and the server is established, automatically disconnect the socket
connection. Valid from 0 to 32767.
For example, if the operation mode is set to TCP Server and Alive Check Time is configured
to 10, TCP Server will listen for the client’s connection and eventually establish a connection.
Since the check time is 10 seconds, the server will wait for 10 seconds until the client
connected to it sends any packet. If there is no data for 10 seconds, server will quit the
connection and return to the listening state. This option is helpful in preventing
communication obstacles that occur when either Eddy or the client quits unexpectedly (i.e.
Sudden black out, reboot, LAN cable cut, etc.). In these cases, the other part of communication
might not recognize the failure of its partner. Such misunderstanding can cause
communication errors.
If the value is set to 0, this function is disabled. Once connected socket will be retained until
explicitly disconnected.
(Only applies to TCP Client, TCP Server, TCP Multi-Server operation modes.)
z
MTU (Default: 1 byte)
MTU stands for Maximum Transmission Unit, and this option needs to be set when
consecutive data from the given serial port needs to be transmitted to socket at once. If 100
bytes of character string are to be transmitted from the serial device and MTU is set to ‘100’,
Eddy waits until the entire 100 bytes are received. After receiving 100 bytes, it transmits this
data to the server as a single packet, using the socket. If 200 bytes of character string are to be
transmitted from the serial device, Eddy breaks this data into 2 packets of 100 bytes. If data
less than 100 bytes is received, Eddy will wait for a certain amount of time. While the duration
is determined by the communication speed, it normally is around 20 msec. If there is no
further data incoming during this time, Eddy will send what is stored until then, though not a