Flintec FAA-27 - Manual (Page 19)

FAA-27, Technical Manual, Rev. 1.1, June 2014
Page 18 of 21
7. Operation
There are 3 LEDs and 2 rotary switches on the front panel of FAA-27. The rotary
switches are being used for adjustment as described in
chapter 4.4 and the LEDs
have different meanings in operation and setup type as indicated below.
Analogue
Output Range
Prog. Switch
position
Adj. Switch
position
TxD & RxD
pins
V / I LED
(after power
on)
4 - 20mA Open circuited On
0 - 20mA Short circuited Off
0 - 10VDC Open circuited Flash
0 - 5VDC Short circuited Blinking
The status of the LEDs in the operation type is given in the table below. Refer to
chapter 9 in case of the Err LED turns on.
The analogue output signal also gives information about the status of the system and
the weighing process to inform PLC as:
Condition
4-20mA
output
0-20mA
output
0
– 10V
output
0
– 5V
output
Operation X X X X
Programming X X X X
The weight is over the range
( Over signal to PLC )
24mA 24mA 11V 5,5V
The weight is under the range
(Under signal to PLC )
0mA 0mA -4.0V -4.0V
“Error” signal to PLC 0mA 0mA 0V 0V
“ADC is out of operating range” error to
PLC
24mA 24mA 11V 5,5V