Woodward easYgen-2000 Series User Manual page 455

Protocol description
Byte 1 Byte 2
MUX Data byte
Example
MUX Byte 2
1 118
Data format "Unsigned Integer"
Octet Number 1.
UNSIGNED8 b to b
7 0
UNSIGNED16 b to b
7 0
UNSIGNED24 b to b
7 0
UNSIGNED32 b to b
7 0
UNSIGNED40 b to b
7 0
UNSIGNED48 b to b
7 0
37535B
If a data protocol is used, a CAN message looks like this:
Byte 3 Byte 4
Data byte Data byte
The MUX byte is counted up, the meaning of the data byte
changes according to the value of the MUX byte.
In the protocol tables is listed which parameter at which MUX on
which position is transmitted. The meaning of the parameter can
be taken by means of the number of the parameter description
("CANopen Mapping parameter").
Byte 3 Byte 4
In MUX 1 (byte 1 has got value 1) the value of parameter 118 is
included in the byte 2 up to byte 5 (mains voltage 1-2). In byte 6
up to byte 7 the value of parameter 147 is included (mains fre‐
quency). Byte 8 includes internal definitions and can be ignored.
UNSIGNED type data has positive integers as values. The range is
between 0 and 2n-1. The data is shown by the bit sequence of
length n.
Bit sequence:
n
b = b
0
Value shown:
n
UNSIGNEDn(b) = b
The following UNSIGNED data types are transmitted as follows:
2. 3.
b to b
15 8
b to b b to b
15 8 23 16
b to b b to b
15 8 23 16
b to b b to b
15 8 23 16
b to b b to b
15 8 23 16
easYgen-2200/2500 | Genset Control
Byte 5 Byte 6
Data byte Data byte
Byte 5 Byte 6
147
to b
n-1
* 2 n-1 + ... + b
n-1
Please note that the bit sequence starts on the left with
the least significant byte.
Example: Value 266 = 10A hex of type UNSIGNED16
is transmitted on the bus in two octets, first 0A hex and
then 01 hex.
4. 5. 6.
b to b
31 24
b to b b to b
31 24 39 32
b to b b to b b
31 24 39 32
Interfaces And Protocols
CANopen Protocol
Byte 7 Byte 8
Data byte Internal
Byte 7 Byte 8
Internal
* 2 1 + b * 2 0
1 0
7. 8.
to b
47 40
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