WAGO 750 Series Manual page 5

4.1.2
4.1.2.1
4.1.2.2
4.1.2.3
4.1.2.4
4.1.3
4.1.3.1
4.1.3.2
4.1.3.2.1
4.1.3.3
4.1.3.3.1
4.1.3.3.1.1
4.1.3.3.1.2
4.1.3.3.2
4.1.3.3.3
4.1.3.3.4
4.1.3.4
4.1.3.4.1
4.1.3.4.2
4.1.3.4.3
4.1.3.4.4
4.1.3.4.5
4.1.3.4.6
4.1.3.4.7
4.1.3.5
4.2
4.2.1
4.2.2
4.2.3
4.2.3.1
4.2.3.2
4.2.3.3
4.2.3.4
4.2.3.5
4.2.3.6
4.2.3.7
4.2.3.8
4.2.3.9
4.2.3.10
4.2.3.11
4.2.4
4.2.5
4.2.5.1
4.2.5.1.1
4.2.5.1.2
4.2.5.2
4.2.5.3
4.2.5.4
4.2.5.5
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Network Architecture - Principles and Regulations ......................... 70
Transmission Media...................................................................... 71
Network Topologies...................................................................... 73
Coupler Modules........................................................................... 76
Important Terms............................................................................ 77
Network Communication................................................................... 79
Protocol layer model ..................................................................... 79
Communication Protocols............................................................. 81
ETHERNET .................................................................................. 82
Channel access method ................................................................. 82
IP-Protocol .................................................................................... 83
RAW IP .................................................................................... 87
IP Multicast .............................................................................. 87
TCP Protocol................................................................................. 87
UDP............................................................................................... 88
ARP............................................................................................... 88
Administration and Diagnosis Protocols ...................................... 89
BootP (Bootstrap Protocol)........................................................... 89
HTTP (HyperText Transfer Protocol) .......................................... 90
DHCP (Dynamic Host Configuration Protocol) ........................... 91
DNS (Domain Name Systems) ..................................................... 92
SNTP-Client (Simple Network Time Protocol)............................ 92
FTP-Server (File Transfer Protocol)............................................. 92
SMTP (Simple Mail Transfer Protocol) ....................................... 94
Application Protocols ................................................................... 94
MODBUS Functions .............................................................................. 95
General............................................................................................... 95
Use of the MODBUS Functions ........................................................ 97
Description of the MODBUS Functions ........................................... 98
Function Code FC1 (Read Coils).................................................. 99
Function Code FC2 (Read Input Discretes)................................ 100
Function Code FC3 (Read multiple registers) ............................ 101
Function code FC4 (Read input registers) .................................. 102
Function Code FC5 (Write Coil) ............................................... 103
Function Code FC6 (Write single register)................................ 104
Function code FC7 (Read Exception Status) .............................. 105
Function Code FC11 (Get comm event counter)........................ 106
Function Code FC15 (Force Multiple Coils) ............................. 107
Function Code FC16 (Write multiple registers) ........................ 108
Function Code FC23 (Read/Write multiple registers) ................ 108
MODBUS Register Mapping .......................................................... 110
Internal Variables ............................................................................ 111
Description of the internal variables........................................... 113
Watchdog (Fieldbus failure) ....................................................... 113
Watchdog Register:..................................................................... 113
Diagnostic Functions .................................................................. 118
Configuration Functions ............................................................. 118
Firmware Information ................................................................. 120
Constant Registers ..................................................................... 122
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