WAGO 750-880 User Manual

84 Function Description WAGO-I/O-SYSTEM 750
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
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7.3.1 Memory Areas
12
2
4
4
CPU
I
O
11
1
3
1
Programmable Fieldbus Controller
memory area
for input data
input
modules
IEC 61131-
program
memory area
for output data
fieldbus
master
I/O modules
word 1276
word 1531
word 0
word 255
word 256
MODBUS
PFC-OUT-
variables
word 511
word 1276
Ethernet IP
PFC-OUT-
variables
word 1531
word 1275
word 512
word 0
word 255
word 256
MODBUS
PFC-IN-
variables
word 511
word 512
word 1275
Ethernet IP
PFC-IN-
variables
input
modules
output
modules
output
modules
Figure 40: Memory areas and data exchange
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The controller process image contains the physical data for the bus modules.
These have a value of 0 ... 255 and word 512 ... 1275.
 The input module data can be read by the CPU and by the fieldbus side.
 Likewise, data can be written to the output modules from the CPU and the
fieldbus side.
The MODBUS PFC variables are stored in each of the memory areas for word
256 ... 511 between these sides.
 The MODBUS-PFC input variables are written to the input memory area
from the fieldbus side and read in by the CPU for processing.
 The variables processed by the CPU using the IEC-61131-3 program are
places in the output memory area, where they can be read out by the master.
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The memory area for word 1276 ... 1531 for the Ethernet/IP PFC variables is
adjacent to the physical I/O module data.
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WAGO 750-880 Specifications

General

Data Memory	128 KB
Real-time Clock	Yes
Supply Voltage	24 VDC
System Power Supply	24 VDC
Number of I/O Modules	Up to 64
Protection Type	IP20
Relative Humidity	95 % (non-condensing)
Bus System	Ethernet
Interfaces	Ethernet, RS-232
Operating Temperature	-25 °C to +60 °C
Storage Temperature	-40°C to 85°C
Data Rate	10/100 Mbit/s (Ethernet)
Programming Languages	IEC 61131-3
Data Transfer Rate	10/100 Mbit/s
Fieldbus Protocols	MODBUS/TCP
Product Type	Programmable Fieldbus Controller