20
11.3.3 LED "Link/Act. 100 MB"
This LED is directly controlled by the Ethernet controller and it shines if the Gateway is located in a working 100 MB-network (link
pulses are being received) and it flickers when network data traffic takes place.
11.3.4 LED "(Ethernet) State"
Lights green
Connection established and active
Flashes green
Gateway is waiting for connection establishment
Flashes green/red
Gateway is waiting for Ethernet initialization
Lights red
General network error
11.3.5 LED "Power"
This LED is connected directly to the (optionally also electrically isolated) supply voltage of the serial interface (RS-232/422/485).
11.3.6 LED "State"
Lights green
Controllable via Script
Flashes green
Controllable via Script
Flashes green/red
Controllable via Script
Lights red
General Gateway error (see LEDs Error No.), controllable via Script
Flashes red
Fieldbus Gateway is in the configuration/test mode, controllable via Script
11.3.7 LEDs (Error No./Select ID)
If these 4 LEDs flash and LED “State“ simultaneously lights red, the error number is displayed in binary notation (conversion table,
see Annex) in accordance with the table in chapter "Error handling". Additionally these LEDs are controllable via Script:
11.4 Switches
The Gateway features 4 (optionally 5) switches with the following functions:
Termination Rx 422
switchable Rx 422-terminating resistor for the serial interface
Termination Tx 422
switchable Tx 422- or RS-485-terminating resistor for the serial interface
Rotary coding switch S4
ID High for serial interface i. e. configmode
Rotary coding switch S5
ID Low for serial interface i. e. configmode
Rotary coding switch S6 (optional)
control mode-selection switch Ethernet controller
11.4.1 Termination Rx 422 + Tx 422 (serial interface)
If the Gateway is operated as the physically first or last device in an RS-485-bus or as 422, there must be a bus termination at this
Gateway. In order to do this the termination switch is set to position 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 RS-485 literature for further information on the subject of bus terminations.
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.
Bei RS-485 darf nur der Tx 422-Schalter auf ON gestellt werden.
Der Rx 422-Schalter muss auf OFF stehen.
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 RS-422- or RS-485-operation.
