Description of CANopen-Interface
HYDAC ELECTRONIC GMBH
07.10.2010
Mat. No. 669824
Page 58 of 63
11 Transmission of the measuring system position value
Before the measuring system position can be transferred the measuring system has
to be started with the “Node Start” command.
Node-Start Protocol
COB-Identifier = 0
Byte 0
Byte 1
1
Node-ID
Node Start command with the Node-ID of the measuring system (slave) starts only
this device.
Node Start command with
Node-ID = 0
starts all slaves connected to the bus.
After the Node Start command the measuring system transmit the position value one
time with the COB-ID of object 1800h.
Now the measuring system position value can be transmitted in different ways:
1. Asynchronous Transmission
The 1st transmit PDO (object 1800h) transmit the position value of the measuring
system in time intervals. The cyclic time is defined by the value of the cyclic timer
(object 6200h or 1800/5). This transmission starts automatically after the Node Start
command and the value of the cyclic timer is > 0.
The default value of the COB-ID is 180h + Node-ID.
Object
Function Code
COB-ID
Index Communication Parameter
PDO1 (tx)
0011bin
181h – 1FFh
1800h
In order to stop the transmission of the measuring system position temporarily, the
output can be interrupted by timer value = 0, in object 6200h (or 1800/5).