Glossary
S7-300 Programmable Controller Hardware and Installation
12-4 A5E00105492-01
Diagnostic buffer
The diagnostic buffer is a buffered memory area in the CPU in which diagnostic
events are stored in the order of their occurrence.
Diagnostic Interrupt
Modules capable of diagnostic operations report detected system error events to
the --> CPU, using diagnostic interrupts.
Diagnostics
--> System Diagnostics
DP master
A --> master which operates in accordance with EN 50170, Part 3 is referred to as
a DP master.
DP Slave
A --> slave operated on PROFIBUS with PROFIBUS-DP protocol and in
accordance with EN 50170, Part 3 is referred to as DP slave.
Equipotential bonding
Electrical connection (equipotential bonding conductor) which gives the bodies of
electrical equipment and external conducting bodies the same or approximately the
same potential, in order to prevent disturbing or dangerous voltages from being
generated between these bodies.
Error display
The error display is one of the possible responses of the operating system to a -->
runtime error. The other possible responses are: --> error response in the user
program, CPU STOP.
Error handling via OB
When the operating system detects a specific error (e.g. access error with
STEP 7), it calls a dedicated organization block (Error OB) that determines
subsequent CPU response.
Error response
Response to a --> runtime error. The operating system can respond in the following
ways: transition of the PLC to STOP mode, call of an organization block in which
the user can program an error response or display.
To Next Page
Loading...
Need help?
General
