Glossary - Siemens SIMATIC ET 200AL System Manual

Glossary

Alarm
An message sent to the operator due to events or states of the system.
Button (WinCC)
Object in WinCC that points out faults in the plant
Channel fault
Channel-related error of an individual channel - an I/O with inputs, for example, wire break or
short circuit
Device
Modules with a network connection are referred to as device. Devices are installed on racks
where they can be interconnected with other modules.
Diagnostics buffer
A buffered memory area in the CPU; it stores diagnostics events in the order of their
occurrence
Firmware of the CPU
In SIMATIC, a distinction is made between the firmware of the CPU and user programs.
The firmware is a software embedded in electronic devices, which means it is permanently
connected with the hardware functionally. It is usually saved in a flash memory, such as
EPROM, EEPROM or ROM, and cannot be replaced by the user or only with special means
or functions.
User program: see glossary entry "User program"
Global screen (WinCC)
A screen that is opened in the system diagnostics window is a global screen.
HMI device
Human Machine Interface, device for visualization and control of automation processes.
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Function Manual, 09/2016, A5E03735838-AD
Diagnostics