2.1 Non operating mode related functions
11
2 General Functions
Version 04 05/2014
2 General Functions
Transmission rate
The OZD Profi 12M … PRO support all the transmission
speeds (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 … PRO receives a frame. The setting or
adjustment is dependent on the transmission rate and
the set operating mode. Depending on the OZD Profi
12M … PRO , this can last up to several seconds.
If the transmission speed has not been recognized, the
outputs of all channels 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 … PRO 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 … PRO act passively
when it is switched on. They recognize the transfer
speed from the frames sent by the bus subscriber. An
optical help when putting the device into operation is
provided by the channel LED which then lights up.
2.1 Non operating mode related functions