HIMax System 9 Lifecycle
HI 801 001 E Rev. 4.01 Page 111 of 122
NOTE
In Ex applications, danger of explosion due to spark formation!
Spark formation possible by unplugging on-load connectors.
Do not unplug on-load connectors!
9.3.1 Disturbances
Disturbances in the processor modules cause the redundant processor module to assume
the control task. If no redundant processor module is configured, the entire controller is
shut-down.
The Error LED on the processor module indicates the existence of disturbances.
For possible reasons for the Error LED to light, refer to the X-CPU manual. In the Control
Panel, execute the Resource command on the Online menu to switch off the Error LED.
All the modules automatically detect disturbances during operation and use the Error LED
to indicate them on the module front plate.
SILworX can be used to diagnose faults (except for communication faults) even if the
controller is in the STOP state.
Prior to replacing an I/O module, check if disturbances exist on the external line and if the
corresponding sensor or actuator is properly functioning.
Once a failure has been removed (e.g., due to repair of the external wires or a module's
replacement), the HIMax system autonomously enters the faulty-free state and switches off
the corresponding LEDs. No user acknowledgment is required.
If a restart inhibition is required for an application, it must be programmed in the user
program.
9.3.2 Connecting the Power Supply after a Service Interruption
After connecting power supply, the HIMax system modules start in random order. This
applies for the HIMax modules as well as for the connected remote I/Os.
9.3.3 Connecting the redundant Power Supply
Because of potential high currents, act with particular caution when connecting a redundant
power supply during operation.
WARNING
Physical injury due to overheating possible when connecting a power supply unit!
Check proper polarity, prior to connecting connecting a redundant power supply unit
during operation!
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