C.4.10 Setpoint Commands - Sn, Hn, Pn, An
The DAS 72.1 has 3 logic outputs where the status is dependent on the weight value (setpoint). Each logic output
can be assigned an independent setpoint value (Sn) with a corresponding hysteresis (Hn), switch action (Pn) and
base (An – switch on the gross or the net weight).
Sn
Setpoint value for logic output 1, 2 or 3
Request / Setting
Master ( PC / PLC ) sends
DAS 72.1 responds
Result
S1
¿
S1:+01500
setpoint S1 = 1 500 d
S1_03000
¿
OK
setpoint S1= 3 000 d
Similarly to read or set the logic output 2 or 3 setpoint, use S2 or S3 instead of S1.
H1
Hysteresis for logic output 1, 2 or 3
Using the H1 command, the hysteresis on the setpoint value is set by the numeric value. Permitted values
are 1 … 9 999.
Master ( PC / PLC ) sends
DAS 72.1 responds
Result
H1
¿
H1:+00100
Hysteresis H1 = 100 d
H1_03000
¿
OK
Hysteresis H1 = 3 000 d
Pn
Switch Logic for output 1, 2 or 3
Using the P1 command, the switch characteristic setpoint S1 ”ON“ or ”OFF“ will be setup. Permitted values
are 0 or 1.
Master ( PC / PLC ) sends
DAS 72.1 responds
Result
P1
¿
P1:+00000
switch logic P1 = 0
P1_00001
¿
OK
switch logic P1 = 1
Example
Setpoint
Hysteresis
Switch logic
Load
Output open
Output closed
S1 = 2 000 kg
H1 = 100 kg
P1 = 1
increasing
³
2 101 kg
0 ... 2 100 kg
S1 = 2 000 kg
H1 = 100 kg
P1 = 1
decreasing
³
2 000 kg
1 999 ... 0 kg
S1 = 2 000 kg
H1 = 100 kg
P1 = 0
increasing
0 ... 1 999 kg
³
2 000 kg
S1 = 2 000 kg
H1 = 100 kg
P1 = 0
decreasing
1 900 ... 0 kg
³
1 901 kg
Example switch logic P1=1 for setpoint (S1) of 2 000 kg (lines 1 & 2 of table above):
When the weight is increasing between 0 kg and 2100 kg the logic output is “ON”. Once the weight increases
above 2 100 kg then the logic output is “OFF”. The logic output will come “ON” again when the weight value
drops below 2 000 kg.
Example switch logic P1=0 for setpoint (S1) of 2 000 kg (lines 3 & 4 of table above):
When the weight is increasing between 0 kg and 1 999 kg the logic output is “OFF”. Once the weight increases
above 1 999 kg then the logic output is “ON”. The logic output will switch “OFF” again when the weight value
drops below 1 900 kg.
Page 48
Manual DAS 72.1
