Siemens SIMATIC ET 200S Operating Instructions Manual page 155

Electronic modules
Electronic modules provide inputs and outputs for process signals. There are digital and
analog electronic modules.
Firmware update
Updating of the firmware of the interface module.
You should update the interface module to the latest firmware version following (compatible)
function-related expansions or performance improvements.
FREEZE
This is a control command of 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 again cyclically until the
DP master sends the UNFREEZE control command.
Frequency converter
The frequency converter implements the smooth controlling of the speed of asynchronous
motors. It masters both simple (frequency controlling) as well as more complex driving tasks
(vector controlling). It can also be used for torque control.
Ground
The conductive mass of earth, the electrical potential of which is equivalent to zero. In the
vicinity of grounding electrodes, the potential may not be zero. The term "reference ground"
is often used here.
Grounding
Grounding means connecting an electrically conductive part to a grounding electrode by
means of a grounding system.
GSD file
The properties of a PROFINET device are described in a GSD (General Station Descriptor)
file that contains all required information for configuration.
As with PROFIBUS, you can link a PROFINET device in STEP 7 by means of a GSD file.
In PROFINET IO, the GSD file is always in XML format. The structure of the GSD file
corresponds to ISO 15734, the worldwide standard for device descriptions.
In PROFIBUS, the GSD file is in ASCII format (as defined in IEC 61784-1:2002 Ed1 CP 3/1).
ET 200S
Operating Instructions, 08/2008, A5E00515771-06
Glossary
155