Jetter JC-120MC, User Manual

Page: 560 / 634

560 Jetter AG
10 Programming
RTR frames via CAN-Prim interface
RTR (Remote Transmission Request) frames are a type of message specific
to CAN. Using an RTR frame a CAN node A can prompt another CAN node B
to send a message. An RTR frame cannot be used to send user data. Node B
is prompted to send a frame of the same CAN-ID and the corresponding data.
Step Action
1
Select any message box for sending RTR frames and another message
box for receiving them.
In this manual message box 0 is used for sending and message box 1 for
receiving RTR frames.
2 Configure message box 0 as outbox for RTR frames:
R 200010531 := 2;
3 Configure the CAN-ID of the RTR frame:
R 200010532 := CAN-ID;
4
Activate message box 0:
R 200010543 := 1;
Result:
Bit 0 = 1 in R 200010530
5
Configure message box 1 as inbox for replies to an RTR frame:
R 200010551 := 0;
6
Configure the CAN-ID of the RTR frame:
R 200010552 := CAN-ID;
7 Activate message box 1:
R 200010563 := 1;
Result:
Bit 0 = 1 in R 200010550
RTR frames
Configuration for
sending and receiving
RTR frames