ICP DAS USA I-7530A User Manual page 25

it means that the CAN ID is 0x002 when the I-7530A#1 receives the RS-
232 commands from Device1 and transfers it to CAN message.
Afterwards, this CAN message is only accepted by Device2 because the
configurations of acceptance code and acceptance mask of Device2.
Similarly, if Device1 wants to send RS-232 commands "1234567" to
Device3, it needs to send "0031234567" RS-232 commands to I-7530A#1.
When the Device2 or Device3 respond the RS-232 commands "456789",
the CAN message will have CAN ID "0x002" and "0x003" because of the
configurations of Fixed Tx CAN ID of I-7530A#2 and I-7530A#3. Because
the I-7530A#1 is set to Response with CAN ID, the Device1 will receive
the RS-232 commands "002456789" or "003456789". Therefore, Device1
can decide the target device which RS-232 commands will be sent to.
Also, Device1 knows where the RS-232 commands come from. The
general concept of transmitting data from Device1 to Device2 is shown
below.
Note: In pair connection mode, all command strings listed in section 4 are
useless. When the RS-232/485/422 or CAN buffer of I-7530A is overflow.
The ERR Led will be turned on for 300ms, and then I-7530A will be reset
by watchdog automatically.
I-7530A RS-232/485/422 to CAN Converter User's Manual (Version 1.2, Sep/2011) ------------- 25