RACOM M!DGE3, Руководство пользователя

Страница: 65 / 183

Note
It may happen, that a response from a slave (No.1) is delivered after the respective timeout
expired and the Master generates the request for the next slave (No.2) in the meantime.
In such case the delayed response from No.1 would have been considered as the response
from No.2. When Poll response control is On, the delayed response from the slave No.1
is discarded and the Master stays ready for the response from No.2.
"Off" – The Master does not check packets incoming from the RF channel - all packets are passed
to the application, including broadcasts. That allows e.g. spontaneous packets to be generated at
remote sites. This mode is suitable for Master-Master communication scheme or a combination of
the UNI and ASYNC LINK protocols.
Mode of Connected device: SLAVE
Accept broadcasts
List box {On; Off}, default = "On"
"On" – Broadcast packets received at the radio channel are forwarded to the COM port.
"Off" – Broadcast packets (received at the radio channel) are discarded. Unicast packets are
forwarded to the COM port.
7.1.3. Terminal servers
Generally, a Terminal Server (also referred to as a Serial Server) enables connection of devices with
serial interface to a M!DGE3 over the local area network (LAN). It is a virtual substitute for devices
used as serial-to-TCP(UDP) converters.
In some special cases, the Terminal server can be also used for reducing the network load from applic-
ations using TCP. A TCP session can be terminated locally at the Terminal server in M!DGE3, user
data extracted from TCP messages and processed like it comes from a COM port. When data reaches
the destination M!DGE3, it can be transferred to the RTU either via a serial interface or via TCP (UDP),
using the Terminal server again.
65 © RACOM s.r.o. – M!DGE3 Cellular Router
Settings