Siemens 7MC3040-..., Руководство по эксплуатации, Страница: 49 / 116

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Operating manual PA
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Caution !

Disconnect the pyrometer from any voltage source

Install all required electric connections

Connect the converter with the PC

Install the converter according to instructions

Connect the voltage supply for the pyrometer

Start CellaView

Select the correct COM port or use the CellaView search function.
For more information on how to work with CellaView read the separate
CellaView manual.
11.3 CellaView via RS485 bus connection
The RS485 two-wire bus consists of the bus cable itself with a maximum
length of 1200 m. The participants are connected to this cable via a
branch line with a length of 5 m max.
Up to 31 pyrometers can be connected to the RS485 bus. CellaView
controls the communication on the bus and prompts allocated pyrome-
ters to send or to receive data. Each participant will be addressed by a
unique address. Configure this address during setup of each pyrometer
using the keyboard.
Configuration layer:
C011
ADDR.
Device address
Enter address of device for
protocol mode
A USB/RS485 converter is needed when working with the RS485 inter-
face. The pyrometer can be directly connected if the PC has an integrat-
ed RS485 Interface board.
In order to prevent reflections on the RS485 connection, it is absolutely
necessary to terminate the bus system with termination network. The
termination can be activated or deactivated by a DIP switch on the py-
rometer. The termination is active when delivered from the factory.
Moreover, use a converter with galvanic isolation (e.g. W&T 38211) to
avoid problems with ground loops.
If the supply voltage or current output are conducted via this ca-
ble, then make sure to consider the voltage drop if the cable
length is greater than 100 m.