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The One Round Flag (bit 08 of O when converting 4 digits, bit 12 of O when converting 8 digits) is
turned ON for one cycle in every 12 cycles after 7SEG(214) has turned ON each of the latch output
signals.
External Connections
Connect the 7-segment display to the Output Unit as shown in the following diagram. This example
shows an 8-digit display. With a 4-digit display, the data outputs (D0 to D3) would be connected to
outputs 0 to 3 and the latch outputs (LE0 to LE3) would be connected to outputs 4 to 7. Output point 12
(for 8-digit display) or output point 8 (for 4-digit display) will be turned ON when one round of data has
been output, but it is not necessary to connect them unless required by the application.
Leftmost 4 digits
D
0
D
1
D
2
D
3
LE3
The inputs and outputs can be connected to the following kinds of Basic I/O Units and High-density I/O
Units as long as they are not mounted in a SYSMAC BUS Remote I/O Rack.
• 4-digit display: Transistor Output Units with 8 or more output points
• 8-digit display: Transistor Output Units with 16 or more output points
Timing Chart
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
CS/CJ/NSJ Series Instructions Reference Manual (W474)
7-segment display
V
DD
(+)
V
SS
(0)
LE2
LE1
LE0
Bit(s) in O
(4 digits, 2 blocks)
00 to 03
04 to 07
04
08
05
09
06
10
07
11
08
12
1 2
12 cycles required to complete one round
Rightmost 4 digits
V
D
DD
0
(+)
D
1
V
D
SS
2
(0)
D
3
LE3
LE2
LE1
LE0
Output status (Data and latch logic depends on C)
0
1
2
3
10
10
10
10
3
4
5
6
7
8
9 10 11 12 1
3. Instructions
OD212
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
DC
COM
Output Unit
Note 0 to 3: Data output for word S
4 to 7: Data output for word S+1
3
805
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