Omron SYSMAC C Series User Manual page 87

Instruction words
The IL instruction causes the contents of the result register to be
transferred to the ILF. Therefore, the ILF is set to 0 if the contents of the
result register are 0. The ILC instruction causes the ILF to be set to 1,
regardless of the contents of the result register.
When the IL condition is OFF (for instance, when 0000 or 0001 is OFF in
the above example), the state of each relay between the IL and ILC
instruction is:
Output relay, internal auxiliary
relay
Timer
Counter, shift register, holding
relay
Holds present state]
When the IL condition is ON, the state of each relay is the same as that in
an ordinary relay circuit when the IL/ILC instructions are not used.
SHIFT REGISTER (SFT)
(start channel no.) (end channel no.)
Function
Symbol Acts as a serial input shift register
IN
oP
R ere Remarks
The shift register must be programmed in the order of data input, clock
input, reset input, and an SFT instruction (from the start channel to the
Ladder diagram end channel).
0000 0001 Data input e e nace
t Each SFT instruction must be specified in units of 16 bits. In the circuit
example, 16 bits from 1000 to 1015 are transferred.
9002 Clock input ' š ! R 5 r
$ | + The 16-bit contents of the shift register can be output bit by bit using the
relay numbers of the specified channel.
0003 '
F Reset input When a reset input is applied to the shift register, all 16 bits are reset
together.
TE The data are shifted at the leading edge of the input clock.
| If the holding relay area is used, the data are retained during power
failure until a clock or reset input is applied.
I
Data input—[ 1000 1001 | 1002 | 1003 1004] 1005 ] 1006 ] 1007 ] 1008 | 1009 | 1010 | 1011 |1012 | 1013 |1014 | 1015 |
Reset input i | { { 4 I H i i f