CANopen Master Port Configuration Screen
Original instructions
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Overview
The CANopen master port configuration screen is used to declare and configure the master of the CANopen network from a Modicon M580 PLC station.
Procedure
To access the CANopen master port configuration screen of a M580, follow these steps:
Step
Action
1
From the Project Browser, expand (+) the Configuration directory:
2
Double-click the PLC Bus subdirectory.
Result: The PLC Bus window is displayed.
3
Double-click the CANopen port of the BMECXM module:
Result: The CANopen master configuration window is displayed.
Description
This figure shows an example of the CANopen master configuration window:
This table shows the elements of the CANopen master configuration window and their functions:
Number
Element
Function
1
Tab
Indicates the type of window displayed. In this case, it is the configuration window.
2
Module
Indicates the abbreviated heading of the BMECXM.
3
CANopen communication
Allows you to select:
  • The device and display the Overview tab that gives the characteristics of the BMECXM.
  • The channel and display the Configuration tab that enables you to declare and configure the CANopen master.
4
General parameters
Indicates the slave functions.
5
Configuration
Allows you to configure the parameters of the CANopen bus.
Bus Parameters
The CANopen master port configuration screen allows the configuration of these bus parameters:
Bus parameters
Default value
Comments
Transmission speed
250 kBaud
Enables you to select in a dropdown list:
  • 1000
  • 500
  • 250
  • 125
  • 50
  • 20
SYNC Message COB-ID
128
The BMECXM send SYNC message using COB-ID 0000 0080 hex.
SYNC Message Period
100 ms
Define the interval period between two SYNC messages.
NMT inhibit time
5 ms
During bootup, the CANopen master implements a delay between each NMT message to avoid slave overload. The value has to be given in multiple of 100 μs.
NOTE: The value 0 disables the inhibit time.
Device Bootup Time Out
50 ms
The global SDO timeout for the master is related to the scanning of the network. During this time, the BMECXM reads the object 1000 hex of each slaves devices to analyze the configuration of the CANopen fieldbus.
Specific SDO timeout (ms)
9500 ms
An individual SDO timeout is necessary for slave devices with long response times that are for accesses to the objects 1010 hex,1011 hex,1F50 hex.
The grid displays the node ID, the name, and the SDO timeout value for each present CANopen slave device.