128
The following example uses the 1-second clock pulse bit (25502) so that the
execution condition produced by 00005 is shifted into a 3-word register be-
tween IR 010 and IR 012 every second.
I
P
SFT(10)
010
012
R
00005
25502
00006
Address
Instruction
Operands
00000
LD
00005
00001
LD
25502
00002
LD
00006
00003
SFT(10)
010
012
The following program is used to control the status of the 17th bit of a shift
register running from AR 00 through AR 01. When the 17th bit is to be set,
00004 is turned ON. This causes the jump for JMP(04) 00 not to be made for
that one cycle, and AR 0100 (the 17th bit) will be turned ON. When 12800 is
OFF (i.e., at all times except during the first cycle after 00004 has changed
from OFF to ON), the jump is executed and the status of AR 0100 will not be
changed.
I
P
R
SFT(10)
AR 00
AR 01
JME(05) 00
JMP(04) 00
00200
AR 0100
DIFU(13) 12800
00201
00202
00203
00004
12800
12800
Address
Instruction
Operands
00000
LD
00200
00001
AND
00201
00002
LD
00202
00003
LD
00203
00004
SFT(10)
AR
00
AR
01
00005
LD
00004
00006
DIFU(13)
12800
00007
LD
12800
00008
JMP(04)
00
00009
LD
12800
00010
OUT
AR
0100
00011
JME(05)
00
When a bit that is part of a shift register is used in OUT (or any other instruc-
tion that controls bit status), a syntax error will be generated during the pro-
gram check, but the program will executed properly (i.e., as written).
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 (00001) are
stored in a shift register: ON for good products; OFF for faulty ones. Con-
veyor speed has been adjusted so that HR 0003 of the shift register can be
used to activate a pusher (00500) when a faulty product reaches it, i.e., when
HR 0003 turns ON, 00500 is turned ON to activate the pusher.
The program is set up so that a rotary encoder (00000) controls execution of
SFT(10) through a DIFU(13), the rotary encoder is set up to turn ON and
OFF each time a product passes the first sensor. Another sensor (00002) is
Example 1:
Basic Application
Example 2:
Controlling Bits in Shift
Registers
Example 3:
Control Action
Data Shifting
Section 5-13