WAGO 750-872/020-000 Manual page 6

vi • Table of Contents
4.1.2.4.1
4.1.2.4.2
4.1.2.4.3
4.1.2.5
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
4.3
Static Configuration of the Transmission Mode......................... 129
Dynamic Configuration of the Transmission Mode ................... 129
Errors Occurring when Configuring the Transmission Mode .... 129
Important Terms.......................................................................... 130
Network Communication................................................................. 132
Protocol layer model ................................................................... 132
Communication Protocols........................................................... 134
ETHERNET ................................................................................ 135
Channel access method ............................................................... 135
IP-Protocol .................................................................................. 136
RAW IP .................................................................................. 140
IP Multicast ............................................................................ 140
TCP Protocol............................................................................... 140
UDP............................................................................................. 141
ARP............................................................................................. 141
Administration and Diagnosis Protocols .................................... 142
BootP (Bootstrap Protocol)......................................................... 142
HTTP (HyperText Transfer Protocol) ........................................ 143
DHCP (Dynamic Host Configuration Protocol) ......................... 144
DNS (Domain Name Systems) ................................................... 145
SNTP-Client (Simple Network Time Protocol).......................... 145
FTP-Server (File Transfer Protocol)........................................... 145
SMTP (Simple Mail Transfer Protocol) ..................................... 147
Application Protocols.................................................................. 147
MODBUS Functions ............................................................................ 148
General............................................................................................. 148
Use of the MODBUS Functions ...................................................... 150
Description of the MODBUS Functions.......................................... 151
Function Code FC1 (Read Coils)................................................ 152
Function Code FC2 (Read Input Discretes)................................ 153
Function Code FC3 (Read multiple registers) ............................ 154
Function code FC4 (Read input registers) .................................. 155
Function Code FC5 (Write Coil) ............................................... 156
Function Code FC6 (Write single register)................................ 157
Function Code FC11 (Get comm event counter) ........................ 158
Function Code FC15 (Force Multiple Coils) ............................. 159
Function Code FC16 (Write multiple registers) ........................ 160
Function Code FC22 (Mask Write Register) ............................. 161
Function Code FC23 (Read/Write multiple registers) ................ 162
MODBUS Register Mapping .......................................................... 163
Internal Variables ............................................................................ 165
Description of the internal variables ........................................... 166
Watchdog (Fieldbus failure) ....................................................... 166
Watchdog Register:..................................................................... 167
Diagnostic Functions .................................................................. 171
Configuration Functions ............................................................. 171
Firmware Information ................................................................. 175
Constant Registers ..................................................................... 176
EtherNet/IP (Ethernet/Industrial Protocol)........................................... 178
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP