FX Series Positioning Controllers Program format 5
5-63
4) Logic parameter
Refer to "7-segment display logic" on the next page.
• The internal binary data is converted into BCD
data, then output using the time-sharing method.
• This instruction is processed in accordance with
an operation cycle. It takes 12 operation cycles
to display 4 digits. This instruction can be used
only twice. (This instruction can be used only subtask program.)
Reading a positive/negative numeric (Not available in the FX
2N
-10GM.)
When K17 to K24 are used to specify the number of digits, negative numeric values can also
be read.
1) Display data device No.
Same as on the previous page.
2) Head No. for data output
Y17 : For identifying positive/negative.
When the Y17 is ON: Negative value.
When the Y17 is OFF:Positive value.
Y20 to Y27 : Same with the previous page. (I/Os are octal, so Y18 and Y19 are not available.)
3) Number of digits
K17 (H11) to K24 (H18) are used in accordance with the number of digits from 1 to 8 (16 is
added to the number of digits to determine the "K" value.).
4) Logic parameters
Refer to the table below.
7-segment display logic
Data input: "Positive logic" indicates that the input data is expressed as BCD at the high level.
"Negative logic" indicates that the input data is expressed as BCD at the low level.
Strobe signal: "Positive logic" indicates that data is latched and held when the signal level is
high. "Negative logic" indicates that data is latched and held when the signal level is low.
Table 5.19: 7-segment display logic
Data input Strobe signal n2
Positive
Positive K0
Negative K1
Negative
Positive K2
Negative K3
TTT
3
10
0
12
10 10 10
Data
Strobe
T: Subtask operation cycle
digit
TTTTTTTTT
FNC 74
SEGL
D 100 Y17 K 20 K 0
X00
S·
n2
D·
n1
This instruction displays the 7-segment
display.
(1) (2) (3) (4)
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