Stahl 9185/11-35-10, Руководство по эксплуатации

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227865 / 9185612310
2016-04-15·BA00·III·en·03
Operation
17
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Fieldbus Isolating Repeater
Series 9185
9.6 "BAUD" decode switch for setting the transmission speed
In the fieldbus isolating repeater, the speed (baud rate) of data transfer between
the fieldbus isolating repeater itself and the operating device is set using the decode
switch. The corresponding possible settings are shown in the following table.
*) Default setting upon delivery
**) 9185/11-35-10: AutoDetect (PROFIBUS DP only)
9185/1.-45-10: AutoDetect at RS2 = OFF (PROFIBUS DP only) / 57.6 kBits/s
at RS2 = ON
10 Operation
10.1 Operation
Transmission characteristic
All three interfaces of the fieldbus isolating repeater (X1-X3) are equal communication
channels. The data received on one of the interfaces is always sent to the other two
interfaces.
Line fault detection
Line faults (wire breakage, short circuit) are detected by the device ("ERR" LED = ON)
and not transmitted to other segments, thus allowing a failure-free and independent
operation of different segments.
Signal regeneration (bit refresh)
The amplitude and the bit offset (phase) of the received data are regenerated when
the data is sent to the other segment. This will not limit the maximum conductor length
and the number of users in a PROFIBUS network.
Automatic baud rate detection
If the "BAUD" decode switch is set to "0" and the PROFIBUS is used on RS-422,
the baud rate is automatically detected by evaluating the start delimiters.
After PWR-ON, the device starts with the baud rate search ("ERR" LED will flash).
If valid start delimiters are received, the device will use the detected baud rate
("ERR" LED = Off).
If the interfaces do not receive any telegrams for longer than bit time of 32.768
(Rev. A-C) or 122.880 (Rev. D or higher), the device starts the baud rate search again.
0 *) 1 2 3 4 5 6 7
Bit/s Auto **) 1.2 k 2.4 k 4.8 k 9.6 k 19.2 k 38.4 k 45.45 k
Conductor
length
(
1200 m
(
1200 m
(
1200 m
(
1200 m
(
1200 m
(
1200 m
(
1200 m
8 9 A B C D E F
Bit/s 57.6 k 93.75 k 187.5 k 375 k 500 k 1 M 1.5 M Re
-
served
Conductor
length
(
1200 m
(
1200 m
(
1000 m
(
400 m
(
400 m
(
200 m
(
200 m