Omron SYSMAC C200HS Operation Manual page 313

Advanced I/O Instructions
Using the Instruction
Timing
Bit(s) in O
Function
(4 digits,
1 block)
Data output 00 to 03
Latch output 0
Latch output 1
Latch output 2
Latch output 3
One Round Flag
Application Example
Flags
2. The 7-segment display may require either positive or negative logic, de-
pending on the model.
3. The 7-segment display must have 4 data signal lines and 1 latch signal line
for each digit.
If the first word holding the data to be displayed is specified at S, and the output
word is specified at O, and the SV taken from the table below is specified at C,
then operation will proceed as shown below when the program is executed. If
only four digits are displayed, then only word S will be used.
Data Storage Format
The timing of data output is shown in the following table. "O" is the first word hold-
ing display data and "C" is the output word.
(4 digits,
2 blocks)
00 to 03
0
10
04 to 07
04 08
05 09
06 10
07 11
08 12
0 1 2 3
12 cycles required to complete one round
This example shows a program for displaying 8-digit BCD numbers at a 7-seg-
ment LED display. Assume that the 7-segment display is connected to output
word IR 100. Also assume that the Output Unit is using negative logic, and that
the 7-segment display logic is also negative for data signals and latch signals.
The 8-digit BCD data in DM 0120 (rightmost 4 digits) and DM 0121 (leftmost 4
digits) are always displayed by means of 7SEG(––). When the contents of
DM 0120 and DM 0121 change, the display will also change.
ER: S and S+1 are not in the same data area. (When set to display 8-digit
data.)
Indirectly addressed DM word is non-existent. (Content of *DM word is
not BCD, or the DM area boundary has been exceeded.)
There is an error in operand settings.
25409: SR 25409 will be ON while 7SEG(––) is being executed.
Leftmost 4 digits Rightmost 4 digits
S+1
Output status (Data and latch logic depends on C) p (
1 2 3
10 10 10
4 5 6 7 8 9 10 11 12
25313 (Always ON)
Section 5-28
S
g p
Note 0 to 3: Data output for word S
4 to 7: Data output for word S+1
7SEG(––)
DM0120
100
004
)
303