97
I
P
SFT(33)
DR 10
R
0005
0308
0008
Address Instruction Operands
000 LD 0005
001 LD 0308
002 LD 0008
003 SFT(33)
DR 10
The following program controls the conveyor line shown below so that faulty
products detected at the sensor are pushed down a chute. To do this, the
execution condition determined by inputs from the first sensor (0001) are
stored in a shift register: ON for good products; OFF for faulty ones. Convey-
or speed has been adjusted so that DR 0003 of the shift register can be used
to activate a pusher (0100) when a faulty product reaches it, i.e., when DR
0003 turns ON, 0100 is turned ON to activate the pusher.
The program is set up so that a rotary encoder (0000) controls execution of
SFT(33) through a DIFU(10), the rotary encoder is set up to turn ON and
OFF each time a product passes the first sensor. Another sensor (0002) is
used to detect faulty products in the chute so that the pusher output and DR
0003 of the shift register can be reset as required.
Sensor
Chute
(0002)
(0100)
Sensor
(0001)
Rotary Encoder
(0000)
Pusher
I
P
SFT(33)
DR 00
R
0001
0000
0003
0100
DR 0003
0002
DR 0003
0100
Address Instruction Operands
000 LD 0001
001 LD 0000
002 LD 0003
003 SFT(33)
DR 00
004 LD DR 0003
005 OUT 0100
006 LD 0002
007 OUT NOT 0100
008 OUT NOT DR 0003
Example 2:
Control Action
Instruction Set Section 3-7
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