Glossary - Siemens SIMATIC S7-1500 Function Manual

Glossary

Alarm
An message sent to the operator due to events or states of the system.
Backup CPU
Role of a CPU in the S7-1500R/H redundant system. If the R/H system is in RUN-Redundant
system state, the primary CPU controls the process. The backup CPU processes the user
program synchronously and can take over the process control if the primary CPU fails.
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.
Diagnostics
Function Manual, 11/2019, A5E03735838-AF
119