CAN CHECKED MCE18, Руководство пользователя

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Rev 1.0
15
6 FAQ
In this chapter, recurring questions are collected, and solutions are offered.
6.1 Does the MCE18 come pre-configured
The MCE18 comes with our standard configuration. This is described in chapters 4.1 described. It is
possible to change these default values with the DSS.
6.2 My inputs influence each other
With versions 1 and 2, it can happen that unused analog inputs change with changes to adjacent
inputs. This behavior is normal. If this is not desired, it can be avoided by wiring the unused inputs to
ground.
6.3 Unable to connect to DSS
If you can't connect your MCE to the DSS despite wiring the USB correctly, there could be two other
reasons. The first cause is the lack of the appropriate driver. You can find the information about this
in chapters 4. If the driver is up-to-date and the COM port is correctly detected, the cause is probably
different. Cause two: The firmware on your MCE18 is outdated and does not yet support a DSS
connection. In this case, an update of your firmware is necessary. The corresponding steps are
described in chapter 4 described.
6.4 How to Choose the Right Offset, Multiplier, Divider and Resolution
The analog inputs provide 10bit resolution and thus values from 0 to 1023. The value must be
converted in the control unit. All values are "unsigned little endian"
Example 1:
Value to display: AIN1 Voltage 0-5V
Can ID: 0x700 Byte0+1 Multiplier: 5; Divisor: 1023; Offset: 0
or
Multiplier: (5/1023=) 0.004887585533; Divisor: 1; Offset 0
Example 2:
Value to be displayed: AIN7 TCC01 Thermocouple Converter Type K 0-1250 Degree Celsius
Can ID: 0x702 Byte6+7 Multiplier: 1250; Divisor: 1023; Offset: 0
or
Multiplier: (1250/1023=) 1.2218963832; Divisor: 1; Offset: 0
You are also welcome to download and use our tool: https://www.canchecked.de/updater/maxxecu-
sensor-calculation.xlsx
6.5 How do I connect speed inputs?
The connection of speed inputs is not provided on the MCE18. It does not have any frequency inputs.
6.6 How do I change the Can Bus settings?
Changing the Can Bus settings is done via the DSS. The detailed process is described in chapter 4.1.
6.7 Can I put 12V on the DIN
With the CFE18, no 12V may be added to the digital inputs. The digital inputs of the MCE18 are 12V
protected from variant 3 on.