Siemens S7-400PLC Especificaciones Pagina 467

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Glossary
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
467
Temperature coefficient
Parameter in STEP 7 for analog input modules during when measuring temperature with
thermoresistors (RTD). The temperature coefficient is selected to suit the thermoresistor
used (according to DIN standard).
Temperature error
The temperature error is the drift of the measured/output values caused by changes in the
ambient temperature of the analog module. It is specified as a percentage per degree Kelvin
and relates to the nominal range of the analog module.
Temperature error of the internal compensation
The temperature error of the internal compensation occurs only when measuring with
thermoelements. It indicates the error that must be added to the actual temperature error
when the "internal reference" mode is selected. The error is specified either as a percentage
of the physical nominal range of the analog module or as an absolute value in °C.
Temporary data
Temporary data is → local data of a block that is entered in the L stack during execution of
the block and that is no longer available on completion of execution.
Total current
Total of all the currents of all output channels of a digital output module.
Unforce
→ Force
Ungrounded
Without electrical connection to ground.
Warm restart
Warm restart following a power down with a set of dynamic data programmed by the user
und a user program component specified in the system.
A warm restart is characterized by the setting of a status bit or other suitable means that can
be read by the user program and indicate that the stoppage of the automation system
caused by a power down was detected in RUN mode.
Wire break
Parameter in STEP 7. A line continuity or wire break check is used to monitor the connection
from the input to the sensor or from the output to the actuator. If a broken wire is detected,
the module senses a current flow at the input/output set in the parameter assignment.
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