Vhandy Technology
GCAN-208 user manual
5. Frequently Asked Questions
1. Is it necessary to use a 120Ω terminal matching resistor?
It
is recommended that the 120Ω terminal matching resistor be used to absorb end-
point
reflections and provide a stable physical link. When performing a single-node
self-transmitting
and self-receiving test, the 120 Ω terminal resistance must be
connected
to form a loop, otherwise the self-transmitting and self-receiving test cannot
be
performed. The GCAN-208 series module integrates a 120 Ω terminal resistance,
which
can be connected through the DIP switch.
2. Can multiple GCAN-208 series modules be installed on one CAN bus?
Due
to the structural characteristics of the CAN bus, multiple CAN nodes can be
connected
to one bus. Therefore, one CAN bus allows the installation of multiple
CAN-to-optical
modules without affecting the bus. The actual number is related to the
maximum
number of CAN bus nodes.
3. What is the highest data conversion rate of GCAN-208 series modules?
The
single CAN channel of the GCAN-208 series module supports CAN bus data
conversion
at a maximum of 8000 fps. The frame mentioned here refers to a data
frame
with 8 data in the standard frame. If it is less than 8 bytes of data or a remote
frame,
it may be faster.
4. Why are the Fiber and CAN indicator lights off?
Only
when there is data transmission on the optical fiber or CAN end and the module
is
in data conversion, the Fiber and CAN indicator lights will light up.
5. How to set the communication baud rate of GCAN-208 series modules?
A
group of commonly used baud rate values can be set through the DIP switch
inside
the module. If you want to use other baud rates, please contact the relevant
personnel
of Vhandy Technology Co., Ltd.
6. Does the system enter the standby or sleep state affect the reception?
Will
have an impact. At this time, all processing will stop, which may cause the
hardware
receiving buffer overflow error at most. If there is a program to open the
device,
it will try to prevent the system from entering the standby or sleep state, so as
to
ensure the normal operation of the system. When using GCAN-208 series modules,
please
disable the standby and sleep functions of the system.