Siemens SIMATIC ET 200iSP Operating Instructions Manual page 367

DP slaves can be the distributed I/O devices ET 200M, ET 200X, ET 200L, ET 200S, ET
200iSP, or DP slaves from Siemens or other vendors.
Flutter monitoring
Flutter monitoring is a process control function for digital input signals. Flutter monitoring
detects and reports unusual signal profiles.
FREEZE
This is a control command from the DP master to a group of DP slaves.
When a DP slave receives the FREEZE control command, it freezes the current status of the
inputs and transfers them cyclically to the DP master.
After each subsequent FREEZE control command, the DP slave freezes the status of the
inputs again.
The input data is not transferred from the DP slave to the DP master cyclically again until the
DP master sends the UNFREEZE control command.
Ground
The electrical potential of conductive ground can be pulled down to zero at any point. In the
vicinity of ground connections, ground may assume a potential other than zero. For this reason,
the term "reference ground" is often used.
Grounding
Refers to connecting a conductive element to ground via a grounding system.
Grounding busbar PA
Term describing the connection of electrical equipment operated in hazardous areas to the
equipotential busbar.
GSD file
The GSD file (device master file) contains all the features specific to a DP slave. The format
of the GSD file is defined in
HART
engl.: Highway Adressable Remote Transducer
Hot swapping
Refers to the removal and insertion of modules while ET 200iSP is in RUN mode.
ET 200iSP
Operating Instructions, 11/2017, A5E00247483-07
IEC 61784-1:2002 Ed1 CP 3/1 .
Glossary
367