Delta AH500 Programming Manual page 556

AH 5 00 Pr ogr am m ing Ma n ua l
2. When X1.0 is ON, Y0.4~Y0.7 are ON cyclically. It takes twelve scan cycles for Y0.4~Y0.7 to be
ON. After the execution of the instruction is complete, SM693 is ON for a scan cycle.
3. If there is on four-digit seven-segment display, n is within the range between 0 and 3.

After the pins 1, 2, 4, and 8 are connected in parallel, they are connected to Y0.0~Y0.3
on the PLC, and the latches are connected to Y0.4~Y0.7 on the PLC.

When X1.0 is ON, the instruction is executed. Y0.4~Y0.7 are ON cyclically, and the value
in D10 is shown on seven-segment display.
4. If there are two four-digit seven-segment displays, n is within the range between 4 and 7.

After the pins 1, 2, 4, and 8 are connected in parallel, they are connected to Y0.8~Y0.11
on the PLC, and the latches are connected to Y0.4~Y0.7 on the PLC.

The value in D10 is shown on first seven-segment display, and the value in D11 is shown
on second seven-segment display. If the values in D10 and D11 are 1234 and 4321
respectively, 1234 is shown on second seven-segment display.
5. The wiring:
Y0.0 Y0.1 Y0.2 Y0.3 Y0.4 Y0.5 Y0.6 Y0.7 Y0.8 Y0.9 Y0.10 Y0.11
1 2 4
3 2
10
10
1
2
4
8
First 7-segment display
Note: The transistor output module AH16AN01T-5A is used in this example.
Additional remark:
1. Whether an output is a positive output or a negative output, and whether there is one four-digit
seven-segment display or two four-digit seven-segment displays depend on n.
2. The outputs on the PLC should be NPN transistors whose collectors are open collectors.
Besides, an output has to connect a pull-up resistor to the DC power supply (less than 30 V
DC). Therefore, when an output is ON, a signal of low potential is output.

The negative logic:
Binary-coded
decimal value
b b
3 2
0 0
6 - 3 8 8
0 1 2 3
8
10 10 10 10
1
0
10 10
V+
Second 7-segment display
Output
(Binary-coded
decimal code)
b b 8 4
1 0
0 0 0 0
UP
+
24VDC
1
3 2
10 10 10
10
1
2
4
8
2 1 A B
0 0 1 1
ZP
0
V+
Signal
C D
1 1