Operational Description; Ip Secure Router Application - TAPKO MECip-Sec Product Description

MECip

Operational Description

SECURE
4 Operational Description
In KNX network installations, MECip-Sec is used as KNX IP line/area coupler to connect
KNX IP and KNX TP (see also chapter 2.2 IP Secure Routing). It can be used in plain mode,
without activation of Security, and in ETS projects where Security is set to active. After
connecting to KNX TP, MECip-Sec operates with its default settings. For KNX IP routers, only
Individual Addresses x.y.0 can be set. Setting the correct Individual Address is necessary for
proper telegram transmission and functioning within the installation.
4.1

IP Secure Router Application

During normal operation, MECip-Sec reacts in accordance with its filter settings. When
MECip-Sec receives telegrams that use Individual Addresses as destination (for example
during commissioning), it compares the Individual Address of the receiver with its own
Individual Address and decides on that whether it has to route the telegrams or not. When
MECip-Sec receives telegrams that use group addresses as destination, only the telegrams
whose group addresses are entered in the filter table are routed.
If a telegram is routed by MECip-Sec to TP without receiving the corresponding
acknowledgement, i.e. due to a missing receiver or to a transmission error, the telegram will
be repeated up to three times (depending on the ETS setting). With the parameter
„Repetitions if errors ...", this function can be configured for the KNX TP line and both kinds
of telegrams. It is recommended to use the default parameter setting.
The IP Secure Router application is designed for usage in 10/100 BaseT networks compliant
to IEEE802.3. The AutoSensing function sets the baud rate (10 Mbit or 100 Mbit)
automatically. The IP address can be received from a DHCP server. For this, the automatic
assignment of the IP address can be set in ETS ("obtain an IP address automatically"). If set so
and no DHCP server was found, MECip-Sec starts an AutoIP procedure and autonomously
assigns the IP address. For MECip-Sec having a fixed IP configuration (IP address as well as
subnet mask and standard gateway), this can also be set by ETS.
- 16 -