DURAG D-LX 200, Руководство пользователя

Страница: 59 / 116

Adjusting the Flame Monitor
6.3 Range selection
The purpose of range switching is to be able to use the ideal presettings to
detect the flame signal for two different operating states of the burner (e. g.
gas and oil operation). Relevant presettings are the thresholds for intensity
and flame flicker frequency, as well as the gain characteristic curve.
The presettings are provided independently of each other, for both ranges
(Range A and Range B). Activation of the range occurs either automatically,
via the burner control (e.g. in the event of fuel change, burner start, a defined
boiler load or with activation of flue gas recirculation), or manually, using an
external switch.
In the event of an error (interruption of the control line) the D − LX 200,
D − LX 720 automatically activates Range A. In order to achieve a safe state in
this case, Range A must be used for the combustion process with the stronger
flame signal.
D − LX 200, D − LX 720
59
6.4 Setting the Modbus address
In order to use the evaluation software described in chapter 7 from page 69 ,
"D
− LX 200 InformationCentre", to display and store the data of the D − LX 200,
D − LX 720, a Modbus slave address must be configured.
At delivery, the Modbus slave address is preset to " 1 " ( presetting ).
The Modbus slave address of the flame monitor D − LX 200, D − LX 720 can be
set to Modbus slave address 1 to 64 using mode switch S5 (printed circuit
board no. 2).
Please also note the information and instructions on setting the Modbus slave
address in chapter 8.2 from page 83.
6.5 Setting process
The settings made in the factory at delivery (for thresholds and gain
characteristic curves) can be adapted by the operator, if they do not prove
adequate for the current application. The following flow charts show, in
comprehensible form, the complex processes involved in this adaptation,
which have been proven in practice.
Aim of the setting
Flame OFF settings:
When the burner is switched off, the thresholds are set so high that the flame
monitor always indicates "Flame OFF".

The "Flame" LED on the front panel must be dark