3-8
Driving the Display
PX 30 and PX 120 Operating Manual
Variable Mode
BCD-Coded Transmission
? = 1
Inserts "?"; flashes alternately with the lowest value digit of the
variable value
? = 0
"?" not inserted
_ = 1
Inserts "_"; flashes alternately with the lowest value digit of the
variable value
_ = 0
"_" not inserted
If ? = 1 and _ = 1, "?" will be inserted.
"?" or "_" can still be flashed at the point of the lowest value digit even when the variable
value is not transmitted (only in the 1st cycle, when E18 and E19 = 1).
N = 1
A negative prefix (-) is placed before the variable value
N = 0
Display without negative prefix
C = 1
Display configured for binary-coding
C = 0/1
Display configured for BCD-coding
23 22 21 20 19 18 15
0
0
1
1
Variable Nos.
7
0
0
0 ? _ N C n n n
1
2
3
4
5
6
1st cycle
0 ... 7
23 22 21 20 19 18 15
1
0
e
0
Variable Value
3 3 3 3 2 2 2 2 1 1 1 1 0 0 0 0
7
0
BCD-digit
BCD-digit
BCD-digit
BCD-digit
0
8
4
3
11
12
10
10
10
-
10
10
10
10
10
-
10
10
10
10
10
10
10
10
10
10
10
10
10
10
1 to 4-figure
BCD-digit
5 to 8-figure
BCD-digit
9 and 10-figure
BCD-digit
3
2
1
0
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
2nd cycle
3rd cycle
4th cycle
2nd cycle
2nd cycle
3rd cycle
2nd to 4th cycle
23 22
21 20 19 18
15
23 22
21 20 19 18
15
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