GE GFK-1852 user manual Class C Network, Network Address, Broadcast Address, IP Netmask

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A

Class C Network

IP address 192.0.0.xxx to 223.255.255.xxx

These network addresses are most common and are often used in small companies. These networks can consist of a maximum number of 254 hosts.

Example: 192.7.1.9 (network 192.7.1, host 9)

The remaining addresses 224.x.x.x - 239.x.x.x are defined as ”class D” and are used as a multicast addresses.

The addresses 240.x.x.x. - 254.x.x.x are defined as "class E" and are reserved addresses.

Network Address

The host address with all host bits set to "0" is used to address the network as a whole (in routing entries, for example).

Broadcast Address

The address with the host part bits set to ‘1” is the broadcast address, meaning “for every station”.

Network and Broadcast addresses must not be used as a host address (e.g. 192.168.0.0 identifies the entire network, 192.168.0.255 identifies the broadcast address).

IP Netmask

The netmask is used to divide the IP address differently from the standard defined by the classes A, B, C. A netmask defines how many bits from the IP address are to be taken as the network section and how many bits are to be taken as the host section.

When the number of host bits is entered, the VMSE calculates the netmask. The netmask is displayed in standard decimal-dot notation.

 

Network Bits

Host Bits

Netmask

Class A

8

24

255.0.0.0

Class B

16

16

255.255.0.0

Class C

24

8

255.255.255.0

Figure A-1. Standard IP Network Netmask

A-2

VersaMax Serial to Ethernet Adapter User's Manual – July 2000

GFK-1852

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Contents GE Fanuc Automation GFL-002 Preface Contents Contents Chapter Serial Line Interfaces Appendix a IP Addresses Introduction and Quick Start IntroductionPass Thru Firmware Vmse Firmware OptionsSRTP/SNP Firmware Modbus TCP/RTU firmwareQuick Start Default IP AddressProcedure Assigning a New IP Address Preliminary StepResults of the Ping Command Results of the Telnet 3.16.27.44 1 Command Screen Appearance Just Before Step G Vmse Configuration Screen GFK-1852 Configuration Command PromptConfiguration Example Parameter PromptIntroduction and Quick Start Vmse Interfaces Serial InterfacePower Requirements Network InterfaceHardware Address MAC Address Network Protocols Packing Algorithm PassThru Firmware onlyIP Address Port Number Configuration Configuration StepsEntering Serial Configuration Mode Entering Network Configuration Mode VMSE’s IP AddressArp -s 191.12.3.77 00-20-4A-01-64-0B Assigning a New IP AddressUnix Telnet 191.12.3.77Configuration Parameters SRTP/SNP Firmware Configuration Setup Network/IP SettingsGateway IP Address Channel, Serial, and Protocol SetupsSRTP/SNP Protocol Mode NetmaskSNP ID to IP Address Mapping only for SRTP/SNP Mode#2 Serial Interface ConfigurationSNP T1 T4 Timers SNP ID a IP AddressPassThru Firmware Configuration Setup Basic ParametersGateway IP Address Telnet Configuration PasswordIP Address NetmaskInterface Mode Common settingsFlow Control Port Number Remote IP AddressRemote TCP Port Connect Mode Automatic Connection AddressATDTx.x.x.x,pppp or ATDTx.x.x.x/pppp Datagram ModeModem Emulation Mode ATDTx.x.x.xATD0.0.0.0 Disconnect ModeForce Telnet Mode ATDx.x.x.xInactivity Timeout Buffer FlushingPack Control Send Characters Telnet Terminal TypeModbus TCP/RTU Firmware Configuration Setup Modbus Hardware Configuration ScreenProtocol Serial and Mode SettingsModem Control Settings Serial InterfaceAdvanced Modbus Protocol Settings Modbus ID to IP Address Mapping only used for MasterMonitor Mode and Firmware Upgrade Monitor CommandsCommand Description SI194.39.78.234146.138.146.138 Command result codesFirmware Download Using Serial Port IP address =HyperTerminal Dialog Box Firmware Download Using a Network Host Windows NT Procedure Firmware DistributionWindows NT Command Line Example Code Explanation Destination PasswordVmse Firmware File List Windows 95/98 Procedure Obtaining Tftp Software for Windows 95/98Serial Line Interfaces Serial Line InterfacesScrew Block Connector Pin-outs and Other Components Front Panel LayoutFront Panel Components Cable Diagrams Cable IC200CBL504 To PLCSpecifications User-Built Cable #1 Vmse RJ45 Serial to MiniconverterApplication User-Built Cable #2 Vmse RJ45 Serial to PC 9-Pin Sub-D For Serial Monitor/Load of VmseUser-Built Cable #3 Vmse RJ45 Serial to PC 9-pin D-Sub 10. Vmse to VersaMax Serial CableUser-Built Cable #4 Vmse RS-422 Terminals to PLC To PLC RS-422/485 Serial PortUsing the Vmse on an RS-422/485 Multidrop Network Multidrop Application NotesPin No Signal Description 15. IBM-AT 9-Pin Serial Port ConnectorPin, D-Sub PLC Serial Port Connector 3LQ15-Pin, D-Sub PLC Serial Port Connector RS-485 Port 15-Pin Female D-SubRJ-11 PLC Serial Port Connector Pin Signal Name Description NumberRS-232, 6-Pin RJ-11 RJ-45 VersaMax Nano/Micro PLC Serial Port Connector RS-232, 8-Pin RJ-45IC690ACC901 Miniconverter 9-Pin, Male D-Sub Connector 20. IC690ACC901 Miniconverter RS-232 Connector Pin-Out Technical Data LEDs DimensionsWeight CaseClass a Network IP AddressesIP Addressing Class B NetworkBroadcast Address Class C NetworkNetwork Address IP NetmaskPrivate IP Networks and the Internet Network RFC’s Binary to Hexadecimal Conversion Table Decimal Binary HexadecimalElectromagnetic Emissions Product SafetyDeclaration of Conformity Electromagnetic ImmunityIndex Index LEDSRTP/SNP