Woodward easYgen-3000XT Series, Руководство пользователя

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6.4.1.2.2 Default SDO Communication Channel
Another possibility for transmitting a frequency setpoint is to send the value via default
SDO communication channel. The device listens to the CAN ID 600 (hex) + Node-ID
internally to perform the desired control, the reply is on CAN ID 580 (hex) + Node-ID.
The following example shows the send format on CANopen with Node-ID 1.
The value is sent on the bus via the control parameter 509 of the device.
The hexadecimal value 2000 is calculated internally:
• 509 (dec) -- 1FD (hex) •
• 1FD (hex) + 2000 (hex) = 21FD (hex) •
Please note that high and low bytes are exchanged in the sent value.
The data (hex) shows the state of parameter 509 to achieve the required control.
The following table shows exemplary send data for the device on the CANopen bus.
Identifier Description Data (hex)
601 Remote F setpoint 2B FD 21 01 C4 13 00 00
6.4.1.3 Transmitting A Voltage Setpoint
It is possible to transmit a voltage setpoint value via the CANopen protocol. Prerequisite
for the use of a voltage setpoint via an interface is the configuration of the voltage
setpoint sources with AnalogManager "AM Voltage SP1 [V]"
╚═▷ 5618 or AnalogManager
"AM Voltage SP2 [V]" ╚═▷ 5619 .
Refer to ╚═▷ “4.4.4.1 Voltage Control” for detailed information.
The respective voltage setpoint source is to be configured to "05.59 Interface v setp [V]".
Two different methods to transmit a voltage setpoint setpoint via CANopen are detailed
below.
These are "Transmitting a voltage setpoint via RPDO" and "Transmitting a voltage setpoint
via default SDO communication channel". The advantages and the disadvantages of
these two methods are as follows.
RPDO Default SDO communication channel
Classical communication for CANopen devices Configuration process
One message Two messages
No validation of the received answer Validation answer, if message has been received by the
unit
Only working in operational mode May take longer in case of communication with two
messages
Table 109: Comparison
776 easYgen-3000XT Series B37574
6 Application Field
6.4.1.2.2 Default SDO Communication Channel
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