Siemens SITRANS RD500 Instrukcja obsługi - Strona 28

Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Przełącznik Siemens SITRANS RD500. Siemens SITRANS RD500 48 stron. Configuring sitrans rd500 for connection to multiranger with modbus rtu
Również dla Siemens SITRANS RD500: Instrukcja obsługi (8 strony), Instrukcja obsługi (8 strony), Instrukcja obsługi (8 strony), Podręcznik aplikacji (6 strony), Podręcznik (11 strony), Przykłady zastosowań (9 strony)

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Siemens SITRANS RD500 Instrukcja obsługi

Application Example

The PV reading from a thermocouple is 3 degrees lower than the actual temperature
when the process is at +200 degrees. It reads only 1 degree lower than the actual
temperature when the process is at +300 degrees.
Desired PV = (PV x Slope) + Offset
Slope = 300-200
299-197
Offset = 200 - (0.980 x 197) = 6.940
A Slope value of 0.980 and an Offset value of 6.940 corrects the sensor error.

Modbus - Adding Devices

Below, see how to add I/O data that originates from external serial Modbus devices. This
allows the RD500's capabilities to be extended to any device equipped with a serial port
and that supports the Modbus RTU slave protocol.
For more information regarding the serial connectivity of the RD500, refer to the
hardware manual found at www.siemens.com/sitransRD500.
After adding each Modbus device, click Apply, and the next device field will become
available.
Driver Settings
•
Protocol Type: Selects Modbus protocl: RTU or ASCII
•
RTU Framing: Detect via Timing and Track Frame Contents options
•
Slave Response Timeout: The time in milliseconds (mS) that the Modbus master
allows the Modbus slave device to respond. If the Modbus master does not receive
a response from the slave in the specified time, the master will enter a timeout error
in the event log.
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SITRANS RD500 – OPERATING INSTRUCTIONS
= 0.980
7ML19985MA01