Installation OZD Profi 12M ...
Release
01
07/2017
15
1.1 Non operating mode related functions
Transmission rate
The OZD Profi 12M ... support all the transmission rates defined in the EN
50170 standard:
9.6 kBit/s, 19.2 kBit/s, 45.45 kBit/s, 93.75 kBit/s,187.5 kBit/s and
500 kBit/s and additionally 1.5 MBit/s, 3 MBit/s, 6 MBit/s and 12 MBit/s.
The transmission rate is set automatically as soon as the OZD Profi 12M
... receives a frame. The setting or adjustment is dependent on the
transmission rate and the set operating mode. Depending on the OZD
Profi 12M ... this can last up to several seconds.
If the transmission speed has not been recognized, the outputs of all ports
are blocked. If the transmission rate changes during operation, this is
detected by the repeaters, which then automatically adjust their settings
accordingly.
Transfer malfunctions may temporarily occur while the rate is being
altered.
Signal regeneration
The repeaters regenerate the signal form and amplitude of the data
received. This allows up to 122 OZD Profi 12M ... to be cascaded (limited
by the address space in PROFIBUS networks).
Help when setting up
At least one bus subscriber must be switched on and active in order to
check the optical fiber connections during the installation. This bus
subscriber serves as the frame source. The OZD Profi 12M ... act
passively when it is switched on. They recognize the transfer rate from the
frames sent by the bus subscriber. An optical help when putting the
device into operation is provided by the port LED which then lights up.
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