* Value does not affect the function type
** Holds infinitely or until triggered
As alternative to the linear decay an averaged decay was implemented. For selection see the following
table.
Table 10: Decay Functions
Please note the different meanings of the parameters from “XE” and “AA”:
The linear decay rate (XE) is given in K/s
The averaged decay (AA) gives the time when the signal will have reached 90% of the final
temperature.
10.9 Sensor Control
10.9.1 Current Output
The current output corresponds to the target temperature value. The output can be set to 0 – 20 mA or
4 – 20 mA.
XO=4 sets the current output range to 4 – 20 mA
H=500 sets the temperature for the top current output value to 500 (in current scale)
e.g., the top current output value of 20 mA shall represent 500°C
L=0 sets the temperature for the bottom current output value to 0 (in current scale)
e.g., the bottom current output value of 4 mA shall represent 0°C
The minimum temperature span between “H” and “L” command values is 20 K.
For testing purposes the output can be forced to provide a constant current value.
O=13.57 output of a constant current at 13.57 mA
O=60 switches back to the target temperature controlled output
10.9.2 Relay Output
The relay output (alarm output) can be triggered:
by target temperature
by internal sensor temperature
manually (command controlled)
The alarm output can be set either to N.C. (normally closed: relay contacts are closed while in the home
position) or N.O. (normally open: relay contacts are open while in the home position).
K=2 alarm output triggered by target temperature and internal sensor temperature, N.O.
normally open
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