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Dräger Polytron 7000
Communication settings
10.2.6
Setting the signal type of the maintenance signal
1. Select
Settings
>
Communication
>
Analog interface
>
Maint. signal
.
2. Select the signal type.
10.2.7
Adjusting the electric current of the static maintenance signal
The electric current can only be adjusted if the maintenance signal is set to static.
Otherwise the function is not available.
1. Select
Settings
>
Communication
>
Analog interface
>
Maint. value
.
2. Set the electric current value and select
Confirm
.
10.2.8
Adjusting the zero shift of the 4-20 mA signal
The 4 mA zero-point of the 4-20 mA signal can be shifted by a correction value of
± 0.5 mA.
1. Select
Settings
>
Communication
>
Analog interface
>
Offset current
.
2. Set the correction value and select
Confirm
.
10.2.9
Testing the 4-20 mA interface
For testing of the 4-20 mA interface it is possible to issue different currents as test
signals simulating different states.
These functions can be used to trigger alarms in the control unit. If necessary,
deactivate the alarms in the control unit first.
●
To turn on a test signal, select
Settings
>
Communication
>
Analog interface
and the desired test.
●
To turn off the test signal select the corresponding option for each test.
10.3 LON
interface
10.3.1
Displaying the Neuron ID
The neuron chip is the core piece of the fieldbus component. Each neuron chip has
its own neuron ID by which the gas detector is recognised on the LON network.
●
Select
Settings
>
Communication
>
LON
>
Show Neuron ID
.
static
A constant current signal is issued. The electric current
can be configured.
dynamic
An alternating signal of 3 and 5 mA with a frequency of
approx. 1 Hz is issued.
t
[s]
1,1
[mA]
0,7
5
3
