Siemens SIMATIC ET 200M Operating Instructions Manual page 262

Glossary
Programming device
Programming devices are essentially compact and mobile PCs that are suitable for industrial
purposes. They are equipped with special hardware and software for programmable logic
controllers (SIMATIC).
Punch value
Punch values are values issued to the process due to faulty signal output modules.
Alternatively they are used for faulty signal input modules in the user program instead of
process values. Punch values can be pre-configured by the user (e.g. maintaining the old
value).
Redundant systems
Redundant systems are characterized by multiple (redundant) occurrences of important
automation components. Failure of a redundant component will not cause program
processing to be interrupted.
Reference potential
Potential that is used to view and/or measure voltages for each circuit involved.
Response monitoring
is a slave parameter. If a DP Slave is not addressed during the response monitoring time, it
will switch to safe mode and set its outputs to "0".
Response Time
The response time is the average time interval between an input modification and the
relevant output modification.
S7 diagnosis
You can use the user program to request S7 diagnosis for any module in the SIMATIC S7 / M7
module range. The S7 diagnosis structure is the same for central and distributed modules.
The diagnostic data of a module are located in the data records 0 and 1 in the module's
system data area. Data record 0 contains 4 bytes of diagnostic data that indicate the current
module state. Data record 1 also contains module-specific diagnostic data.
Data records 0 and 1 are part of the slave diagnosis.
Segment
The bus line between two terminating resistors forms a segment. A segment contains
between 0 and 32 → bus nodes. Segments can be linked via the RS 485 repeater.
262
Operating Instructions, 04/2022, EWA-4NEB7806006-09
ET 200M