Siemens SIPROTEC 6MD665, Руководство пользователя

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2 Functions
30
6MD665 Manual
C53000-G1876-C103-3
2.4 Measured value processing
With version V 4.2, the Bay Processing Unit 6MD665 has direct analogue measured
value recording, as has the 6MD663/4 bay controller. The measured value recording
is an order option (seventh digit of the order number is 1 or 5). If the Bay Processing
Unit has this option, the measured value functions described in the following are avail-
able. If the seventh digit of the order number is 0, the Bay Processing Unit only pro-
cesses measured values transferred via the process bus (RMS values). Threshold
value calculations in the CFC are possible here, for example.
Measured value processing of the SIPROTEC
®
device 6MD665 provides functions
for recording, calculating and displaying varying measurement quantities. For further
information please also refer to the SIPROTEC
®
system description /1/.
In addition, the device contains the measuring transducer blocks which form various
operands from the current and voltage input quantities.
2.4.1 Measurement
The Measured values parameter group is used for compiling the user-defined mea-
sured values. These measured values are created via DIGSI
®
CFC or arrive via inter
relay communication.
Usecases Limit measured values are used to indicate when a measured value recorded as the
operational measured value has exceeded the upper or lower limits.
2.4.1.1 Description
Measured values The two measuring transducer inputs (
±
20 mA) contained in the device are already
specified in the default setting. These measuring transducer inputs supply non-linear-
ized values which can be converted via DIGSI
®
CFC to measured values such as
pressure or temperature.
Derived measured values are inserted from the information catalog.
Information on configuration of the user-defined measured values can be found in
SIPROTEC
®
system description /1/.
2.4.1.2 Information
2.4.2 General Transducer Blocks
The measuring transducer blocks form various operands from these input quantities.
No. Message Type of Information Description
996 Td1= MW Transducer 1
997 Td2= MW Transducer 2