Installation Guide
Table Of Contents
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There are two rotary switches at the bottom of the ICF-1171I Series,
which is used to configure the arbitration rate or data rate of the CAN
bus. Rotary switch 1 is used to set up the arbitration rate of CAN (CAN
2.0)/CAN FD (ISO CAN FD); rotary switch 2 is used to set up the data
rate of CAN FD (ISO CAN FD).
Explore the following use cases to see how you use the rotary switches:
Use case 1: My devices use CAN (CAN2.0) with communication
speed/bit rate of 1Mbps. How do I set up the baudrate of ICF-1171I?
You can set up a fixed baudrate by switching rotary switch 1 to PIN 1,
and ignore rotary switch 2. Or, you can use auto baudrate by switching
rotary switch 1 to PIN 0. When the ICF-1171I receives the data frames
sent by the connected CAN device, it can detect the baudrate and set to
itself.
The auto baudrate function sets up a sequence to initialize the
baudrates supported by the ICF-1171I (e.g., 1Mbps, 800 kbps, 500kbps
as in the table below).
Also, make sure the DIP switch in the front panel is set to “CAN” mode.
Use case 2: My devices use CAN FD (ISO CAN FD) with dual bit rates
(or called BRS, Bit Rate Switch), nominal/arbitration rate is 1Mbps, and
data rate is 2Mbps.
In this case, please set rotary switch 1 to PIN 1, and set rotary switch 2
to PIN 3. Also, make sure the DIP switch in the front panel is set to
“CAN FD” mode.
Auto-baudrate is supported in CAN (CAN 2.0). To use auto baudrate,
send the CAN data to the ICF-1171I. The ICF-1171I will detect the
baudrate and apply to itself.
CAN 2.0/CAN FD Arbitration Rate
Rotary Switch 1 Pin Position
Auto baudrate (only in CAN 2.0)
0 (Default)
1 Mbps
1
800 kbps
2
500 kbps
3
250 kbps
4
125 kbps
5
50* kbps
6
25* kbps
7
Reserved
8
Reserved
9
*Arbitration rates 25 kbps and 50 kbps are only used in CAN (CAN
2.0); An arbitration rate equal to or above 125 kbps is supported in
CAN FD (ISO CAN FD). For CAN FD (ISO CAN FD), the suggested ratio
of arbitration rate to data rate ranges from 1:1 to 1:8.
CAN FD Data Rate
Rotary Switch 2 Pin Position
5 Mbps
0
4 Mbps
1
3 Mbps
2
2 Mbps
3 (Default)
1 Mbps
4