3. Instructions
824
CS/CJ/NSJ Series Instructions Reference Manual (W474)
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.
z 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.
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
z Timing Chart
Function
Bit(s) in O
Output status (Data and latch logic depends on C)
(4 digits, 1 block) (4 digits, 2 blocks)
Data output 00 to 03
00 to 03
04 to 07
Latch output 0 04 08
Latch output 1 05 09
Latch output 2 06 10
Latch output 3 07 11
One Round Flag 08 12
1
3
5
7
9
11
13
15
COM
0
2
4
6
8
10
12
14
DC
OD212
D
0
D
1
D
2
D
3
V
DD
(+)
V
SS
(0)
LE3 LE2 LE1 LE0
D
0
D
1
D
2
D
3
V
DD
(+)
V
SS
(0)
LE3 LE2 LE1 LE0
7-segment display
Leftmost 4 digits Rightmost 4 digits
Output Unit
10
0
10
1
10
2
10
3
1 2 3 4 5 6 7 8 9 10 11 12 1
12 cycles required to complete one round
Note 0 to 3: Data output for word S
4 to 7: Data output for word S+1
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