ABB ACQ80, Firmware Manual

Page: 179 / 390

Parameters 179
1 × Pt100 analog
I/O Pt100 sensor connected to a standard analog
input selected by parameter
35.14 Temperature 1
AI source
and an analog output.
The following settings are required:
• Set the hardware jumper or switch related to
the analog input to
U
(voltage). Any change
must be validated by a control unit reboot.
• Set the appropriate analog input unit selection
parameter in group
12 Standard AI
to
V
(volt).
• In parameter group
13 Standard AO
, set the
source selection parameter of the analog
output to
Temp sensor 1 excitation
.
The analog output feeds a constant current
through the sensor. As the resistance of the
sensor increases along with its temperature, the
voltage over the sensor increases. The voltage is
read by the analog input and converted into
degrees.
5
2 × Pt100 analog
I/O As selection
1 × Pt100 analog I/O
, but with two
sensors connected in series. Using multiple
sensors improves measurement accuracy
significantly.
6
3 × Pt100 analog
I/O As selection
1 × Pt100 analog I/O
, but with three
sensors connected in series. Using multiple
sensors improves measurement accuracy
significantly.
7
Direct
temperature The temperature is taken from the source
selected by parameter
35.14 Temperature 1 AI
source
. The value of the source is assumed to be
degrees Celsius.
11
35.12 Temperature 1
fault limit
Defines the fault limit for temperature
supervision function 1. When measured
temperature 1 exceeds the limit, the drive
trips on fault
4981 External temperature 1
.
The unit is selected by parameter
96.16 Unit
selection
.
130 °C or
266 °F
-60…5000 °C or
-76…9032 °F Fault limit for temperature monitoring function
1. 1 = 1 unit
No. Name/Value Description Def/
FbEq16