Operation
GA09420_002_C0 – (2016-10) –
Leybold
33
4.7.2 Operating Parameters
As the Profibus protocol is highly complex, the parameters and programming of
ITR 90 P are described in detail in the separate Interface Manual (→ [3]).
4.7.2.1 Operating Software
For operating the transmitter via Profibus, prior installation of the ITR 90 specific
GSD file is required on the bus master side. This file can be downloaded from the
CD ROM, which is enclosed in scope of delivery of the transmitter.
4.7.2.2 Node Address Setting
For unambiguous identification of the transmitter in a Profibus environment, a node
address is required. The node address setting is made on the transmitter.
The node address (0 … 125
dec
) is set in hexadecimal form
(00 … 7D
hex
) via the "ADDRESS", "MSD", and "LSD" switches.
The node address is polled by the firmware when the trans-
mitter is switched on. If the setting deviates from the stored
value, the new value is taken over into the NVRAM. If a value
>7D
hex
(>125
dec
) is entered, the node address setting currently
stored in the device remains valid but it can now be defined via
Profibus ("Set slave Address", → [3]).
Electrical connections
The transmitter is connected to Profibus via the 9-pin Profibus connector (→ 22).
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