Distech Controls ECLYPSE ECY-STAT User Manual

14 ECLYPSE Connected Thermostat (ECY-STAT)
Networking Basics
When manually configuring the TCP/IP interface on an ECY-STAT (the DHCP option is not used), an
IP address, subnetwork mask, and a default gateway are required in the Network Settings.
IP Addressing
The most widely used internet addressing scheme is IPv4. It codes an IP address in 32 bits.
An IPv4 address is made up of two parts defined by a subnetwork mask; the network portion (which
identifies a specific network or subnetwork) and the host portion (which identifies a specific device).
About the Subnetwork Mask
Devices on the same sub-network can address IP packets to each other directly without routing. The
range of IP addresses available in a sub-network is defined by the subnetwork mask. This is also
called the subnetwork mask’s ‘address space’. The subnetwork mask is coded in 32 bits as follows.
An IP packet addressed to a device on another network portion will have to be routed through the
router’s WAN port as such an address is not local. BACnet/IP broadcast discovery messages such as
“Who-Is” do not pass through network routers that separate subnetworks. This means that BACnet/IP
controllers on different subnetworks will not normally communicate with each other.
BBMD allows broadcast message to pass through a router: on each subnet, a single device has
BBMD enabled. Each BBMD device ensures BACnet/IP connectivity between subnets by forwarding
broadcast messages found on its subnetwork to each other, and then onto the local subnetwork as a
broadcast message. See BBMD Settings.
The table below contains the recommended network classes for the ECY-STAT. Refer to the Distech Controls
IP Networking Guide for more information.
Network Class CIDR Subnetwork
Mask
Block
Size
Number of Subnetworks
according to the Network Type
Number of Hosts
according to the Network Type
Class A Class B Class C Class A Class B Class C
←Class A Network→
/8 255.0.0.0 256 1 16777214
/9 255.128.0.0 128 2 8388606
←Class B Network→
/16 255.255.0.0 256 256 1 65534 65534
/17 255.255.128.0 128 512 2 32766 32766
←Class C
Network→
/24 255.255.255.0 256 65536 256 1 254 254 254
/25 255.255.255.128 128 131072 512 2 126 126 126
CIDR Addressing
Another way to express the subnetwork mask is through CIDR addressing (Classless Inter-Domain
Routing) which is written as a slash and a number which represents the number of true bits set in the
subnetwork mask. For example, the subnetwork mask 255.128.0.0 is 11111111 10000000 00000000
00000000 in binary or /9.
An IP address can be expressed with its CIDR subnetwork mask in the form of 192.168.0.0/24 for ex-
ample.
IPv4 Communication Fundamentals

Distech Controls ECLYPSE ECY-STAT Specifications

General

Brand	Distech Controls
Model	ECLYPSE ECY-STAT
Category	Thermostat
Language	English