Siemens SIMATIC HMI TP 170A Equipment Manual page 102

Glossary
Power-up test
Checks the status of the CPU and memory each time the power is switched on.
Print screen
Printout of a copy of the screen contents.
Process screen
The display of process values and process progress on the operating unit in the
form of screens, which may contain graphics, texts and values.
Programmable controller
PLC from the SIMATIC S5 series (e.g. AG S5-115U/135U).
Programmable system
PLC from the SIMATIC S7 series (SIMATIC S7-200/300/400).
ProTool
Full graphics based configuration software for the whole SIMATIC HMI unit range
and for Windows-based systems.
Remaining buffer
Configurable size of the message buffer. In the case of buffer overflow, the
operating unit deletes message events until the configured remaining buffer
capacity is reached.
RS232
Standard interface for serial data transfer at a defined voltage level. Transmitter
and receiver are electrically connected.
RS485
Standard interface for serial data transfer at a very high transmission rate.
Glossary-6
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