CANopen Firmware
CAN-CBX-AI420
Manual • Doc.-No.: C.3030.21 / Rev. 1.4
Page 47 of 103
7.7 Reading the Analog Values
7.7.1 Messages of the Analog Inputs
The transmission types for the analog inputs are described in the following:
•
acyclic, synchronous: The transmission is initiated if a SYNC-message has been received (PDO-
transmission type 0) and data has changed.
•
cyclic, synchronous: The transmission is initiated if a defined number of SYNC-messages has been
received (PDO-transmission type 1...240).
•
synchronous, remote request: The state of the inputs is latched with each SYNC-message and is
transmitted after the reception of an RTR-frame (PDO-transmission type 252).
•
asynchronous, remote request: After the reception of an RTR-frame the last determined state of the
inputs is transmitted (PDO-transmission type 253).
•
event controlled, asynchronous: The transmission is initiated if the state of selected inputs has
changed (PDO-transmission type 254, 255).
7.7.2 Supported Transmission Types Based on DS-301
Transmission
Type
PDO-Transmission
supported by
CAN-CBX-AI420
cyclic
acyclic
synchro-
nous
asynchro-
nous
RTR
0
X
X
x
1...240
X
X
x
241...251
reserved
-
252
X
X
x
253
X
X
x
254
X
X
x
255
X
X
x