3 Product Description
System Manual Modular Systems
Page 22 of 114
HI 800 191 E Rev. 2.02
3.4
Short-Circuit Reaction of Output Channels
If a short-circuit occurs in an output channel, the HIMatrix automation systems switch off the
affected channel. If multiple short-circuits occur, the channels are switched off individually in
accordance with their current input.
If the maximum current permitted for all outputs is exceeded, all outputs are switched off and
cyclically switched on again.
i
The terminals for output circuits must not be plugged in while a load is connected. If short-
circuits are present, the resulting high current may damage the terminals.
3.5
Alarms and Sequences of Events Recording - with CPU 03
The HIMatrix system is able to record alarms and sequences of events (SOE) .
3.5.1
Alarms&Events
Events are state changes of a variable that are performed by the plant or controller, and are
provided with a timestamp.
Alarms are events that signalize increased risk potential.
The HIMatrix system records the state changes as events specifying the time point when they
occurred. The X-OPC server transfers the events to other systems such as control systems that
display or evaluate the events.
HIMatrix differentiates between Boolean and scalar events.
Boolean events:
Changes of Boolean variables, e.g., of digital inputs.
Alarm and normal state: They can be arbitrarily assigned to the variable states.
Scalar events:
Exceedance of the limit values defined for a scalar variable.
Scalar variables have a numeric data type, e.g., INT, REAL.
Two upper limits and two lower limits are possible.
The following condition must be met for the limits:
Highest limit (HH) ≥ high limit (H) ≥ normal range ≥ low limit (L) ≥ lowest limit (LL).
A hysteresis can be effective in the following cases:
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If the value falls below one of the upper limits.
-
If the value exceeds one of the lower limit.
A hysteresis is defined to avoid a needless large number of events when a global variable
strongly oscillate around a limit.
HIMatrix can only create events if they are configured in SILworX, see Chapter 7.6. Up to 4 000
alarms and events can be defined.
3.5.2
Creating Events
The processor system is able to create events.
The processor system uses global variables to create the events and stores them in the buffer,
see Chapter 3.5.3. The events are created in the user program cycle.
Every event that has been read can be overwritten by a new event.
System Events
In addition to events, which records changes of global variables or input signals, processor
systems create the following types of system events:
