Functions6.27 [4] CommunicationsOperating with the Local User Interface246 Operating Manual, 06/2017, A5E31930478-05can be used, for example, for correction of cross-reference or for pressure compensationof the device's own measured values.IP addressNoteSupported IP addressesThe device supports only Class A, Class B, and Class C addresses. You cannot use Class Dor Class E addresses.IP addresses are used for unique identification of devices within a network or a networksegment. They are used for data exchange between the communication partners via TCP/IP.An IP address has the following decimal notation:Table 6- 62 Example of an IP address192. 168. 0. 2Network maskSubnet maskThe network mask masks the IP address of a device. The IP address is divided into a"network component" and a "device component".Table 6- 63 MaskingSubnet mask 255. 255. 255. 0IP address 192. 168. 0. 3Division Network component Device componentThe result is a logical separation of a physically uniform network into different networksegments (subnets). Within a segment the network component must be identical and thedevice component different.Default gatewayThe masking determines which IP addresses a device looks for in its own segment andwhich are forwarded to a default gateway. The default gateway of a network forwards allnetwork requests that are not part of the same subnet to other subnets.