Bedienungsanleitung Mastervolt MasterBus CANopen Interface (Seite 5 von 12) (Englisch)

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EN / MasterBus – CANopen Interface 5

 Data type

Data on CANopen can be represented as a float or

as a 16 bit Integer.

Floats store float-point values, that is, values that

have potential decimal places.

Integers use 2 bytes and only store integral values,

that is whole numbers.

Which type you chose depends on the capabilities of

the receiving CANopen product.

 Scaling

When using Integer values on CANopen you might

want to use scaling. This allows values like the

battery voltage to be transmitted without losing

accuracy. Select Scaling ‘x100’ to transmit a value

1325 instead of 13,25.

When receiving a CANopen PDO the input value will

be divided by the scaling value.

Select ‘x1’ if you don’t need scaling.

4.4 DATA FIELD CONFIGURATION

(ADVANCED)

It is also possible to update the data field

configurations directly by changing the strings in

‘Data fields A’ group and ‘Data Fields B’ group.

The complete configuration of each data field is

shown as a string ( sequence of characters).

These strings look like Figure 3 and consist of five

parts: the CANopen configuration, the data direction,

the MasterBus configuration, a comma separator

and the data representation.

Figure 3. Example of configuration string

NOTE: you will notice the same configuration

parameters as in the configuration via the standard

method but now combined into one string.

Meaning:

285

This is the hexadecimal COB-ID of the CANopen

message. Range: 0x181 –0x57F.

b0 Byte followed by the location of the data within

the PDO. Minimum value is 0, maximum value is

< Direction indicator. “<” indicated data direction

from MasterBus to CANopen. “>” indicates data

direction from CANopen to MasterBus

1 Device Number. The device in the Device

numbers group with this number will be used to

connect to. Minimum number 1, maximum

number 20.

m Indicates data on the monitoring page is used.

Other options include a(Alarm page),

c(Configuration page) and h (History page)

0 Index on page. Decimal value ranging from 0 to

1000.

, Comma separator

s Indicates data on CANopen is represented as 2

byte signed int. Other option is f (Float) for a 4

byte float representation.

0 Indicates data scaling on CANopen. Use 0 for no

scaling(x1).

1 for ‘x10 scaling, 2 for x100 scaling and 3 for

x1000 scaling on CANopen.

4.5 CONFIG ERROR

Your CANopen interface status will show ‘Config

Error’ if:

1. Two or more data fields are ‘CANopen<MB’

and have the same COB-ID and the data is

overlapping.

2. One or more data fields are CANopen>MB

and do not fit in the 8 data bytes.

When there is a ‘Config error’ no CANopen PDO’s

will be transmitted or received by the CANopen

interface.

285b0<1m0,s0

Figure 4:

Example of stings in advanced data field

configuration

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