750-841 WAGO, 750-841 Datasheet - Page 172

• Manufacturer Part Number: 750-841
• Description: CONTR.ETHERNET TCP/IP 10/100MBIT
• Manufacturer: WAGO

Specifications of 750-841

• Rohs Compliant: YES
• No. Of Digital Inputs: 10
• No. Of Digital Outputs: 10

164 •
4.2.4 MODBUS Register Mapping
MODBUS Functions
MODBUS Register Mapping
The following tables display the MODBUS addressing and the corresponding
IEC61131 addressing for the process image, the PFC variables, the NOVRAM
data, and the internal variables is represented.
Via the register services the states of the complex and digital I/O modules can
be determined or changed.
Register (Word) Access Reading (with FC3, FC4 and FC23):
Register (Word) Access Writing (with FC6, FC16, FC22 and FC23):
0
... 255
256
... 511
512
... 767
768
... 1023
1024
... 4095
4096
... 12287
12288
... 24575
24576
... 25340
25341
... 28671
28672
... 29436
29437
... 65535
0
... 255
256
... 511
512
... 767
768
... 1023
1024
... 4095
4096
... 12287
[dec]
[dec]
Modbus-Address
Modbus-Address
0x0000
... 0x00FF
0x0100
... 0x01FF
0x0200
... 0x02FF
0x0300
... 0x03FF
0x0400
... 0x0FFF
0x1000
... 0x2FFF
0x3000
... 0x5FFF
0x6000
... 0x62FC
0x62FD
... 0x6FFF
0x7000
... 0x72FC
0x72FD
... 0xFFFF
0x0000
... 0x00FF
0x0100
... 0x01FF
0x0200
... 0x02FF
0x0300
... 0x03FF
0x0400
... 0x0FFF
0x1000
... 0x2FFF
[hex]
[hex]
%IW0
... %IW255
%QW256
... %QW511
%QW0
... %QW255
%IW256
... %IW511
%MW0
... %MW12287
%IW512
... %IW1275
%QW512
... %QW1275
%QW0
... %QW255
%IW256
... %IW511
%QW0
... %QW255
%IW256
... %IW511
IEC61131
IEC61131
Address
Address
-
-
-
-
-
-
Memory Range
Physical Input Area (1)
First 256 Words of physical input data
PFC-OUT-Area
Volatile PFC Output variables
Physical Output Area (1)
First 256 Words of physical output data
PFC-IN-Area
Volatile PFC Input variables
Modbus Exception:
“Illegal data address”
Configuration Register
(see following Chapter 4.2.5.3 Configuration
Functions)
NOVRAM
8kB retain memory (max. 24kB)
Physical Input Area (2)
Additional 764 Words physical input data
Modbus Exception: “
Illegal data address”
Physical Output Area (2)
Additional 764 Words physical output data
Modbus Exception: “
Illegal data address”
Memory Range
Physical Output Area (1)
First 256 Words of physical output data
PFC-IN-Area
Volatile PFC Input variables
Physical Output Area (1)
First 256 Words of physical output data
PFC-IN-Area
Volatile PFC Input variables
Modbus Exception:
“Illegal data address”
Configuration Register
(see following Chapter 4.2.5.3 Configuration
Functions)
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP