Omron C40K Manual De Usuario

The first word of any instruction defines the instruction and provides any de-
finers and sometimes bit operands required by the instruction. All other oper-
ands (i.e., operand words) are placed in words after the instruction word, one
operand to a word, in the same order as these appear in the ladder symbol
for the instruction. Although the SV for TIM and CNT are written to the left of
the symbol on the same line as the instruction, these are the only instructions
for which one line in the ladder symbol must be coded as two words (i.e., two
lines) in the mnemonic code. Also the TC number for TIMH(15) is placed on
a second line even though it is part of the instruction word. For all other in-
structions, each line of the ladder diagram will go into one word of mnemonic
code.

The address and instruction columns of the mnemonic code table are filled in
for the instruction word only. For all other words, the left two columns are left
blank. If the instruction word requires no definer or bit operand, the data col-
umn for it is left blank. It is a good idea to cross though the blank data col-
umn for all instruction words not requiring data so that the data column can
be quickly scanned to see if any addresses have been left out.

If an IR or SR address is used in the data column, the left side of the column
is left blank. If any other data area is used, the data area abbreviation is
placed on the left side and the address is place on the right side. If a con-
stant is to be input, the number symbol (#) is placed on the left side of the
data column and the number to be input is placed on the right side. Any num-
bers input as definers in the instruction word do not require the number sym-
bol on the right side. Remember, TR bits, once defined as a timer or counter,
take a TIM (timer) or CNT (counter) prefix.

When coding an instruction that has a function code, be sure to write in the
function code, which will be necessary when inputting the instruction.

The following diagram and corresponding mnemonic code illustrate the
points described above.

TIM 00

# 0150

0003

0200

DIFU(13) 1500

0100

ADD(30)

#0001

0004

HR 0

MOV(21)

HR 0

HR 2

0006

0007

1505

TIM 00

1500

0002

00005

HR 015

0000

0001

0000

LD

0000

0001

AND

0001

0002

OR

0002

0003

DIFU(13)

1500

0004

LD

0003

0005

AND NOT

0200

0006

LD

0006

0007

AND NOT

0007

0008

AND NOT

1505

0009

OR LD

0010

AND

1500

0011

ADD(30)

#

0001

0004

HR

0

0012

LD

0005

0013

TIM

00

#

0150

0014

LD

TIM

00

0015

MOV(21)

HR

0

HR

2

0016

LD

HR

015

0017

OUT NOT

0100