Manual Mastervolt MasterBus CANopen Interface (page 4 of 12) (English)

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4 MasterBus – CANopen Interface / EN

4 Transfer data between MasterBus and CANopen

The CANopen interface can transfer 100 data fields

(values) between MasterBus and CANopen. This

chapter describes how to configure these fields and

shows some examples.

The CANopen interface uses PDO messages to

receive data from; and transmit data to the

CANopen network. A PDO message is a CANopen

message containing data.

4.1 CONFIGURE THE NUMBER OF DATA

FIELDS

Start by selecting the number of data fields you want

to transfer. This can be configured on the

configuration page at “Nr of fields”.

4.2 CONFIGURE THE DEVICE NUMBERS

Select the number of devices on the MasterBus you

want to communicate with. This can be configured

on the configuration page at “Nr of devices”.

Select the individual devices in the ‘Device numbers’

group.

For example, if you want to connect to your Mass

Combi Ultra and your MLI battery, you select Nr of

devices = 2 and select in the Device numbers group

the Mass Combi and the MLI battery.

Now you can use these devices in the next steps of

configuration.

4.3 DATA FIELD CONFIGURATION

(STANDARD)

To configure one of your data fields select the field

number in the ‘Field config’ group. This loads the

configuration for this field. Changes to the field

configuration will take effect after you press the

‘Save data field’ button. The following parameters

can be changed in this group:

 COB-ID

The PDO on CANopen uses this COB-ID. This COB-

ID is independent from the configured Node-ID.

Minimum value is 0x181(hexadecimal), and the

maximum value is 0x57F(hexadecimal) as defined

by CANopen.

By setting the same COB-ID multiple fields can be

combined into one PDO.

 Byte

Byte location of your data in the CANopen message.

The PDO messages of the CANopen interface

always contain 8 data bytes. The data bytes which

do not contain data are set to 0xFF’.

The ‘Byte’ setting allows you to place the information

next to each other in the 8 data bytes.

For example if you want to combine 2 floats in one

message. Select ‘Byte’ 0 for the first data field and 4

for the second data field (Floats require 4 bytes). If

you want to combine 4 Signed integers select ‘Byte’

0, 2, 4 and 6 for the four data fields(16 bit Integers

require 2 bytes). Floats and Signed integers can be

combined in one PDO as well.

 Device

Select any MasterBus device which has the

information you want to connect to from the

CANopen network. If you select for example “1” the

device at “Device 1” in the ‘Device Indices’ group will

be used for this data field.

 Page

Select the page of the MasterBus device which has

the information you want to connect to. Select

Monitoring, Configuration, Alarm or the History page.

 Index

Select the Index of the information you want to

connect to. The Index can be found by hovering your

mouse pointer over an item in MasterAdjust

software.

Figure 2 shows an example on how to find the index

of a specific data field.

Figure 2:

Monitoring page of the MasterShunt, State of

Charge has an Index of 0

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Mastervolt MasterBus CANopen Interface Manual

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