akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany Tel.: +49 (0) 511 16 59 672-0 ·
www.akytec.de
5
Fig. 5.4 NPN transistor output
6 Operation
After the device is powered on the operating mode is activated. The type of the signal can be
selected in the parameter
in.t
“Input signal”. The complete list of the programming
parameters is shown in Table 7.2.
The input signal is digitalised, the square root calculated (if the function is enabled), the
signal scaled and displayed. The scale factor is calculated based on the parameter
di.Lo
“Lower measuring limit” and
di.Hi
“Upper measuring limit”. The display decimal point can be
specified in the parameters
di.P
.
For other signal processing functions see sections 6.1…6.3. For displayed errors see Table
6.1.
6.1
Control
ON/OFF control is implemented with the NPN transistor output (see 5.1.2). The parameters
SP.Lo
“Lower setpoint limit” and
SP.Hi
“Upper setpoint limit” specify the control limits. The
control function can be selected in the parameter
Cnt
:
−
Heating
−
Cooling
−
Alarm within limits
−
Alarm outside limits
The safe output state can be selected in the parameter
out.E
.
Fig. 6.1
DO-
K
_U
U
+
VD
DO+