I-7530A-MR Modbus RTU to CAN
Converter User’s Manual (Version 1.07, 06/2016) ------------- 41
Figure 3-26: I-7530A-MR#2 Configuration.
Figure 3-27: I-7530A-MR#3 Configuration.
Communication Descriptions:
When the Device1 want to transmit the RS-232 command
“1234567”
to Device2, the command written to I-7530A-MR#1 by the Device1 needs
to be
“0021234567” because the Device1 is set to dynamic Tx CAN ID
(Fixed Tx CAN ID is not checked). The first three bytes of
“0021234567”
is
“002”, it means that the CAN ID is 0x002 while the I-7530A-MR#1
receives the RS-232 commands from the 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 the RS-232 command
“1234567” to Device3, it needs to send “0031234567” to the COM port of
the I-7530A-MR#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 the “Fixed Tx CAN ID” of the I-
7530A-MR#2 and I-7530A-MR#3. Due to the response CAN ID of the I-
