A53 Z0 9 0020 L En Technical documentation
7/ Alarms
The following example will show you how to handle predefined alarms (listed is an example of the
predefined alarm seen above).
[E1857] is dedicated to over speed protection from MDEC [E0332]. The equation is the following:
TEST (E0332 EQ 1) AND (E1857 NE 0) EQ 1 THEN E2199[E1857]:=1 TEND;
[E0332] is the over speed alarm from MDEC.
[E1857] is the control.
If you set [E1857] as security (E1857=5) and [E0332] is set to 1, then [E2204] (hard shut down) will also be
set to 1 and trigger the hard shutdown process.
If you want to use an MDEC alarm that is not handled directly by GENSYS 2.0, you can use a virtual input as
described in the following example:
If you want to handle an MDEC alarm for “SS Power Reduction Active” [E0338], you can use the virtual
input 2 [E2284]. With the CRE config software, set the function [E1329]of the virtual input 2 to “External
alarm”, and load the following equation in a text file:
E2284:=E0338;
8/ Fault code numbers.
Combined yellow / red alarms are global warnings. They can be triggered by one of several faults provided
on the CAN bus (see list below). Apart from these predefined errors, additional alarm sources are available
and can be detected using MDEC fault code numbers.
The MDEC fault code is read by GENSYS 2.0 and stored in MDEC (GENSYS 2.0 variable E0372). If several
failures happen together, the fault code variable will be refreshed every second.
This will help you find which alarm is activated in case of a combined alarm.
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