esd Protocol for CAN Modules - esd electronics, Inc.

Overview
Explanations to Table 1.5.1:
Some of the terms from the table above will be described in detail in following sections of this manual.
For a general understanding of the table, a short explanation of the terms:
Module no. ... Serial number (1...255) which can be allocated to the module by the user
independently from the module type.
active mod no. ... The module no. with which the module is selected by the initialisation identifier
(INIT Id) during the parameter interchange.
I²C EEPROM
mod no. ... The module no. which was stored in the local I²C EEPROM of the module. If no
change in this number had been made after the storing, the actual mod no. is
identical with the I²C EEPROM module no..
Below the combinations of factors, shown in table 1.4.1, which are decisive for the selection of the
default parameters will be explained:
Combination 1
If the positions of the coding switches are $00 when the module starts after a RESET, the I²C
EEPROM data, previously stored, will be overwritten at the moment in which the adjustment is
changed from $00 to any other value. The firmware needs about five seconds for this. Afterwards a
local RESET is triggered by the firmware. During the RESET the message outputs are activated.
The CAN identifier corresponds to the value adjusted at the coding switches.
The module operates with the default parameters.
Combination 2
The second listed combination occurs if no I²C EEPROM is available or the I²C EEPROM data are
faulty. If this is the case, the local software would use the default parameters.
The CAN identifier corresponds to the value adjusted at the coding switches. The actual module no.
corresponds to the value which is adjusted on the coding switches.
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esd Protocol for CAN Modules Rev. 3.2