Moog ACV with CANopen bus interface
2 Access over CANopen
Electronic data sheet (EDS) files
B99224-DV018-D-211, Rev. A, October 2018
36
2.9.7 Bootup message (COB-ID: 0x700)
After a digital servo valve has finished its own initialization and entered the node state 'Pre-Operational' the
digital servo valve sends the boot-up message. This message indicates that the slave is ready for operation.
2.9.8 Node guarding (COB-ID: 0x700, RTR:1)
The node guarding is the periodical monitoring of certain network nodes. Each node can be checked by the
NMT master with a certain period <GuardTime> (0x100C). A second parameter <LifeTimeFactor> (0x100D)
defines a factor after the connection will be detected as lost. The resolution of the guarding time is 1 ms. To
enable the node guarding on a slave device, the guard time and life time factor must be set. The guarding is
started with the first guarding telegram of the master. During node guarding the master sends a remote trans-
mit request (RTR) frame to each guarded slave. The slave answers with its actual NMT state and a toggle bit.
This toggle bit alternates in each cycle.
The monitoring time until fault reaction 110 (CAN life guard error or heartbeat error) is triggered is calculated
as follows:
Monitoring time = <GuardTime> (0x100C) * <LifeTimeFactor> (0x100D).
2.9.8.1 Object 0x100C: Guard time
This parameter contains the guarding time in milliseconds. The value 0 disables the life guarding.
2.9.8.2 Object 0x100D: Life time factor
This parameter contains the life time factor. The value 0 disables the life guarding.
2.10 Electronic data sheet (EDS) files
Electronic data sheets (EDS) are files which describe the capabilities and the communication objects of a
CANopen device. The EDS is essential to configure CANopen master devices. They are most commonly
used when CANopen modules made available to third parties. The digital servo valve EDS file is provided by
Moog and can be downloaded from the Moog website
http://www.moogsoftwaredownload.com
.
CANopen
Index
Sub-index
Parameter name
Data type
Access
Persistence
Value range
Default
0x100C
0
GuardTime
UINT16
rw
Y
UINT16
0
CANopen
Index
Sub-index
Parameter name
Data type
Access
Persistence
Value range
Default
0x100D
0
LifeTimeFactor
UINT8
rw
Y
UINT8
0