DEUTSCHMANN AUTOMATION UNIGATE CL ProfibusDP, Инструкция по эксплуатации

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17.6.10 UNIGATE fieldbus gateway UNIGATE CL - ProfibusDP V. 2.3 31
Deutschmann Automation GmbH & Co. KG Hardware ports, switches and LEDs
11.4.1 Termination Rx 422 + Tx 422 (serial interface)
If the Gateway is operated as the physically first or last device in an RS485-bus or as 422, there
must be a bus termination at this Gateway. In order to do this the termination switch is set to posi-
tion ON. The resistor (150
Ω
) integrated in the Gateway is activated. In all other cases, the switch
remains in position OFF.
Please refer to the general RS485 literature for further information on the subject of bus termina-
tions.
If the integrated resistor is used, please allow for the fact that this also activates a pull-down
resistor (390
Ω
) to ground and a pull-up resistor (390
Ω
) to VCC.
At RS48 only the Tx 422-switch must be set to ON.
The Rx 422-switch has to be on OFF.
11.4.2 Rotary coding switches S4 + S5 (serial interface)
These two switches can be read out through the Script command "Get (RS_Switch, Destination)"
and the value can be used for further functions. This value is read in when the Gateway is
switched on or always after a Script command has been executed. The switch positions "EE"
(testmode) and "FF" (config mode) are not possible for RS422- or RS485-operation.
11.4.3 Termination (Profibus)
If the Gateway is operated as the first or last physical device in the ProfibusDP, there must be a
bus termination at this Gateway. In order to do this, either a bus terminating resistor must be acti-
vated in the connector or the resistor (220
Ω
) integrated in the Gateway must be activated. In
order to do this, slide the slide switch to position ON. In all other cases, the slide switch must
remain in position OFF. Please refer to the general Profibus literature for further information on
the subject of bus termination.
Note: To activate or deactivate the bus termination, please remove the bus-connector and care-
fully set the switch to the desired position.
11.4.4 Rotary coding switches High + Low (Profibus-ID)
With these two switches the Gateway’s Profibus-ID (00... 7D) is set in hexadecimal notation.
Please refer to the Annex for a conversion table from decimal to hexadecimal. This value is read
in only once when the Gateway is activated.The value can also be read-out or analyzed through
the Script command "Get (FieldbusID, LongTemp)".
See also chapter 16.6.
11.5 The Debug cable for UNIGATE SC
As accessory a pre-configured Debug cable is available. The Debug cable connects the Gate-
way to Debug and RS.