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CP143 H1 / TCP/IP manual Communication protocols
Rev. 00/07 2-7
2.2.2 TCP/IP principle of operation
TCP and IP are only two of the many protocols required for the establishment of a complete
network architecture. The application layer of the computer supplies programs like FTP and Telnet.
The standard handler modules of the program define the application layer of the CP143 TCP/IP.
These application programs use the transport layer and the TCP or UDP protocols to transfer data,
and these protocols communicate with the IP protocol of the internet layer.
The main task of the IP is to address data packets properly. This means that the IP functions like an
envelope. The network determines the destination of the data packet by means of the address and
uses this to route the packet accordingly. The protocol divides data into smaller units as different
networks may require different length data frames. A number is assigned to every packet so that
received packets may be acknowledged and to allow for reassembly of the original data. TCP as
well as IP have their own envelope where they store the required numbers so that these sequence
numbers can be transferred via the network. A packet of data is inserted into a TCP-envelope. This
is then inserted into an IP envelope and transmitted via the network. On the network, TCP is
responsible for the safe transport of data. TCP can recognize and correct transmission errors. These
error detection and correction systems ensure that TCP connections are relatively safe. However, in
this case UDP is much faster. It neither detects missing data packets nor does it check the sequence
of the packets. UDP is an unprotected protocol.
2.2.3 TCP/IP services
OPEN / CONNECT
In an active situation this opens a virtual connection with a partner. In a passive situation this waits
for a connection from a partner.
SEND
Transfer of a data buffer to TCP for transmission to a partner.
RECEIVE
Reception of data from a partner.
CLOSE
Termination of a connection.
- CP143 H1 / TCP/IP 1
- About this manual 4
- Contents 5
- Rev. 00/07 i-3 7
- Lerrzeichen 10
- 1 Introduction 11
- 1-2 Rev. 00/07 12
- 1.2 General 13
- 1.3 Operation 14
- 1.4 Construction 14
- 2 Communication protocols 15
- 2.1.2 Operation 18
- 2.2 TCP/IP protocol 19
- 2-4 Rev. 00/07 20
- Rev. 00/07 2-5 21
- 2-6 Rev. 00/07 22
- 2.2.3 TCP/IP services 23
- 3 Network planning 25
- LerrzeicLerrzeichenhen 26
- 3-2 Rev. 00/07 28
- Rev. 00/07 3-3 29
- CP 143 H1 / TCP/IP 30
- Rev. 00/07 3-5 31
- 3-6 Rev. 00/07 32
- Coaxial cable 33
- 3-8 Rev. 00/07 34
- 3-10 Rev. 00/07 36
- Rev. 00/07 3-11 37
- 3-12 Rev. 00/07 38
- Rev. 00/07 3-13 39
- 3-14 Rev. 00/07 40
- Rev. 00/07 3-15 41
- 3.5 Twisted Pair 42
- Rev. 00/07 3-17 43
- 3.6 Planning a network-layout 44
- Rev. 00/07 3-19 45
- 3-20 Rev. 00/07 46
- Rev. 00/07 4-1 49
- 4-2 Rev. 00/07 50
- 4.1.2 Jumper settings 51
- 4-4 Rev. 00/07 52
- 4.1.3 Sockets and plugs 53
- 4-6 Rev. 00/07 54
- Rev. 00/07 4-7 55
- Base connector X1 56
- Base connector X2 56
- Rev. 00/07 4-9 57
- 4.2 The CP143plus firmware 58
- Dual-port-Ram (DPR) 59
- 4-12 Rev. 00/07 60
- Rev. 00/07 4-13 61
- 4.3 CP143 TCP/IP firmware 62
- Dual-port-RAM (DPR) 63
- 4-16 Rev. 00/07 64
- Rev. 00/07 4-17 65
- 4-18 Rev. 00/07 66
- Rev. 00/07 4-19 67
- 4-20 Rev. 00/07 68
- Rev. 00/07 4-21 69
- 4-22 Rev. 00/07 70
- Rev. 00/07 4-23 71
- 4-24 Rev. 00/07 72
- Rev. 00/07 4-25 73
- 4-26 Rev. 00/07 74
- Rev. 00/07 4-27 75
- Indicators for SEND 76
- Indicators for RECEIVE 76
- Rev. 00/07 4-29 77
- 4-30 Rev. 00/07 78
- 5 Software 79
- 5-2 Rev. 00/07 82
- Rev. 00/07 5-3 83
- 5-4 Rev. 00/07 84
- 5.4 Using on-line help 85
- 5.5 The base file 86
- 5.5.2 Printing the base file 87
- 5-8 Rev. 00/07 88
- Rev. 00/07 5-9 89
- 5-10 Rev. 00/07 90
- Rev. 00/07 5-11 91
- 5-12 Rev. 00/07 92
- 5.6 Initialization 93
- 5-14 Rev. 00/07 94
- 5.6.2 Online 95
- 5.6.3 System configuration 96
- 5.7 Real-time clock functions 97
- 5-18 Rev. 00/07 98
- Rev. 00/07 5-19 99
- 5-20 Rev. 00/07 100
- Rev. 00/07 5-21 101
- 5-22 Rev. 00/07 102
- Rev. 00/07 5-23 103
- 5-24 Rev. 00/07 104
- Rev. 00/07 5-25 105
- 5-26 Rev. 00/07 106
- 5.8.3 Indirect addressing 107
- 5-28 Rev. 00/07 108
- 5.8.4 Multi-connections 109
- 5-30 Rev. 00/07 110
- 5.8.5 List of connections 111
- number determines 112
- Range: 1 to 199 112
- 5.9 General test functions 113
- 5.9.2 Anzw Dump 114
- Rev. 00/07 5-35 115
- 5-36 Rev. 00/07 116
- Rev. 00/07 5-37 117
- 5-38 Rev. 00/07 118
- Rev. 00/07 5-39 119
- 5-40 Rev. 00/07 120
- Rev. 00/07 5-41 121
- 5.10.1 Initialization 122
- Rev. 00/07 5-43 123
- 5-44 Rev. 00/07 124
- Rev. 00/07 5-45 125
- 5-46 Rev. 00/07 126
- Rev. 00/07 5-47 127
- 5-48 Rev. 00/07 128
- Rev. 00/07 5-49 129
- be supplied in the 130
- Rev. 00/07 5-51 131
- 5.10.3 Test functions 132
- 5.11.1 Initialization 133
- 5-54 Rev. 00/07 134
- Rev. 00/07 5-55 135
- 5-56 Rev. 00/07 136
- Rev. 00/07 5-57 137
- Rev. 00/07 5-59 139
- 5-60 Rev. 00/07 140
- Rev. 00/07 5-61 141
- 5-62 Rev. 00/07 142
- number must be 143
- 5-64 Rev. 00/07 144
- 5.11.3 Test functions 145
- 5-66 Rev. 00/07 146
- Rev. 00/07 5-67 147
- 5-68 Rev. 00/07 148
- Rev. 00/07 5-69 149
- 5-70 Rev. 00/07 150
- Rev. 00/07 5-71 151
- 5-72 Rev. 00/07 152
- Rev. 00/07 5-73 153
- 5-74 Rev. 00/07 154
- Rev. 00/07 5-75 155
- 5-76 Rev. 00/07 156
- H1 / TCP/IP manual Software 157
- WRITE job FETCH job 157
- H1 / TCP/IP manual 158
- 6 Commissioning 159
- LerrzLerrzeicheneichen 160
- Rev. 00/07 6-3 163
- Q 304/314 interface 165
- 6.2 Start-up properties 167
- 6.2.2 Status indicators 168
- 6.3 PLC programming 169
- 6.3.2 Programming 170
- 6.4 Example 171
- 6.4.2 Problem 172
- Rev. 00/07 6-13 173
- 6.4.3 Programs for the PLCs 174
- Rev. 00/07 6-15 175
- 6-16 Rev. 00/07 176
- Rev. 00/07 6-17 177
- 6-18 Rev. 00/07 178
- Rev. 00/07 6-19 179
- 6-20 Rev. 00/07 180
- Rev. 00/07 6-21 181
- Station 1 182
- Station 2 182
- Rev. 00/07 6-23 183
- 6-24 Rev. 00/07 184
- Rev. 00/07 6-25 185
- 6-26 Rev. 00/07 186
- 6-28 Rev. 00/07 188
- Rev. 00/07 6-29 189
- 6-30 Rev. 00/07 190
- Rev. 00/07 6-31 191
- 6-32 Rev. 00/07 192
- Appendix 193
- A-2 Rev. 00/07 196
- Rev. 00/07 B-1 197
- B-2 Rev. 00/07 198
- Rev. 00/07 B-3 199
- B-4 Rev. 00/07 200
- Rev. 00/07 C-1 201
- C-2 Rev. 00/07 202
- Rev. 00/07 D-1 203
- D-2 Rev. 00/07 204
- Rev. 00/07 E-1 205
- E-2 Rev. 00/07 206
- Rev. 00/0 F-1 207
- F-2 Rev. 00/07 208
- Rev. 00/0 F-3 209
- F-4 Rev. 00/07 210
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