Operation
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The EtherPath has a built-in buffer to store data. Most of these
settings affect the operation of the buffer and how data is buffered
and transmitted over the Ethernet. The default values should
normally be satisfactory for most installations, but they may be
"tuned" for optimum operation.
Note
: Options 5, 6, 7, and 8 apply to
Client Mode
only, and have no
effect in
Server Mode
.
Transmit Timer
When in Timer Mode:
The time period for which data will be
stored in the buffer before being sent. Allowable values range from
1ms to 10,000ms (10 seconds). A commonly used value is 20 msec.
For example, in this mode, every 20 msec, the buffer will be
transmitted if there is any data in it.
When in Idle Timeout Mode:
The time period this unit's serial
port must be idle (after receiving a character) before sending a block
of data via the Ethenet. This is used to keep incoming blocks of
data intact. It is useful for some protocols such as Modbus RTU.
Its setting depends upon the port speed, and should be several
character times.. Allowable values range from 1ms to 10,000msec
(10 seconds). A typical value for a 9.6 Kbps port is about 3 msec.
For example, in this mode, if there is data in the buffer and 3 msec.
passes with no additional data being received, the buffer is
transmitted.
Timer Mode
When set to 0
, the timer is a free-running clock and if there is data
in the buffer, an IP packet is transmitted every TIMER msec.
When set to 1
, the timer is a serial port idle time value. If there is
data in the buffer and the serial port has been idle for TIMER msec,
then an IP packet is transmitted.
