3-16
Driving the Display
PX 30 and PX 120 Operating Manual
Variable Mode
BCD-Coded Transmission
15/23
2nd to 5th cycle
e
1
0
0
7
w
w
w
w
w
0
w
w
w
Value of Variables
Higher value
BCD-digit
Lower value
BCD-digit
0
PX 120 23 22 21 20 19 18 16
1
7 6 5 4 2 1 0
PX 30 15 14 13 12 11 10 8
0
0
1st cycle
0
?
_ N
n
n
1
n
Variable Nos.
0 ... 7
0
C
? = 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
The cycle in which E19 (e) becomes a Logic 1 signal (last cycle of variable transmission)
determines the value of the 1st decimal power transmitted. The last two figures transmit-
ted correspond to the 10
1
-digit and the 10
0
-digit.
Variable Value
15
14
13
12
11
10
8
23
22
21
20
19
18
16
7
6
5
2
1
0
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