750-841 WAGO, 750-841 Datasheet - Page 238
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750-841
Manufacturer Part Number
750-841
Description
CONTR.ETHERNET TCP/IP 10/100MBIT
Manufacturer
WAGO
Datasheet
1.750-841.pdf
(288 pages)
Specifications of 750-841
Rohs Compliant
YES
No. Of Digital Inputs
10
No. Of Digital Outputs
10
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5.3 Process Data Architecture for EtherNet/IP
5.3.1 Digital Input Modules
I/O Modules
Process Data Architecture for EtherNet/IP
With some I/O modules, the structure of the process data is fieldbus specific.
In the case of a coupler/controller with EtherNet/IP, the process image uses a
word structure (with word alignment). The internal mapping method for data
greater than one byte conforms to the Intel format.
The following section describes the process image for various
WAGO-I/O-SYSTEM 750 and 753 I/O modules when using a
coupler/controller with EtherNet/IP.
For the PFC process image of the programmable fieldbus controller is the the
structure of the process data mapping identical.
Digital input modules supply one bit of data per channel to specify the signal
state for the corresponding channel. These bits are mapped into the Input
Process Image.
When analog input modules are also present in the node, the digital data is
always appended after the analog data in the Input Process Image, grouped
into bytes.
Some digital modules have an additional diagnostic bit per channel in the
Input Process Image. The diagnostic bit is used for detecting faults that occur
(e.g., wire breaks and/or short circuits).
Each input channel seizes one Instance in the Discrete Input Point Object
(Class 0x65).
1 Channel Digital Input Module with Diagnostics
750-435
The input modules seize 2 Instances in Class (0x65).
Note
Depending on the specific position of an I/O module in the fieldbus node,
the process data of all previous byte or bit-oriented modules must be
taken into account to determine its location in the process data map.
Bit 7
Bit 6
Bit 5
Input Process Image
Bit 4
Bit 3
Bit 2
Diagnostic bit
WAGO-I/O-SYSTEM 750
Bit 1
S 1
ETHERNET TCP/IP
Data bit
Bit 0
DI 1
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