WAGO I/O-SYSTEM 750, Technical Description

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Fieldbus Coupler 750-337, 750-338 • 57
Fieldbus Coupler
WAGO-I/O-SYSTEM 750
CANopen
3.1.5.4.1 Indexing the I/O Module Data
If a customer specific configuration was stored prior to the initialization, and
if the currently connected module configuration coincides with the configura-
tion stored before, initialization takes place with this configuration.
Note
For an example for the initialization of the customer specific configuration,
please refer to chapter 3.1.6.6 "Application specific Mapping".
In every other case, when initializing, the object directory is assigned a default
configuration according to the device profile DS 401.
The entry into the object directory is then made separately according to data
width (1 bit, 1 byte, 2 bytes, 3 bytes, etc...) and input and output.
The physical bus module arrangement within a node is optional.
Data width = 1 Word / channel Data width = 1 Bit / channel
Analog input modules Digital input modules
Analog output modules Digital output modules
Input modules for thermal elements Digital output modules with diagnostics (2 Bit / channel)
Input modules for resistance sensors Power supply modules with fuse holder / diagnostics
Pulse width output modules Solid State power relay
Interface module Relay output modules
Up/down counter
I/O modules for angle and path measurement
Table 3-1: I/O module data width
Note
For the number of input and output bits or bytes of the individual I/O modules
please refer to the corresponding I/O module description.
The digital module data is taken into consideration first.
Knowing that CANopen does not transmit the data bit by bit, the digital mod-
ule data is grouped to form bytes and assigned to the corresponding index,
digital input data to index 0x2000, digital output data to index 0x2100.
The assignment of bus module data of a data width of 1 byte or more is made
in relation to the individual indices.
The table reviews the indices of the bus module data.
input modules output modules
Data width
Index
1 Bit digital 0x2000 0x2100
1 Byte specialty modules 0x2200 0x2300
2 Byte specialty modules 0x2400 0x2500
3 Byte specialty modules 0x2600 0x2700
4 Byte specialty modules 0x2800 0x2900
5 Byte specialty modules 0x3000 0x3100
6 Byte specialty modules 0x3200 0x3300
7 Byte specialty modules 0x3400 0x3500
8 Byte specialty modules 0x3600 0x3700
Table 3-2: Indexing the bus module data in the object directory