Siemens SIMATIC TIM 3V-IE DNP3, System Manual

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TIM DNP3
System Manual, 12/2015, C79000-G8976-C253-04
341
Glossary
For further terms, go to the reference to the SIMATIC NET glossary in the preface of the
manual.
Analog value
An analog value is an analog process variable such as pressure, temperature etc. It is
acquired over an analog input as a current or voltage value and converted by this module to
a binary-coded value. In total, the converted value occupies 1 word; in other words, 16 bits
including sign bit.
COM port
→ RS-232
Command
A command it is a setpoint or a switching command from the DNP3 master station. It is sent
to a station.
Configuration
During configuration, communication- and connection-specific system settings are made for
each device.
Counted value
A counted value (for example amount of flow) is acquired via a digital input as a pulse train
and totaled to produce a binary-coded value. A counted value is 2 words (between TIM and
CPU): 28 bits for the binary-coded value 4 display bits.
In DNP3, numeric values are transferred between subscribers in WORD format.
CTS
Clear to send
Signal in the data flow control
Data message
The actual transmission of data takes the form of data messages. These contain a specified
number of a certain information type.