Mitsubishi Electric melsec-k Owner's manual

CONTENTS
1 . Introduction .......................... ....>.... ........................................................ 1
2 .
Hardwarecomposition and operation .......................................................... 2
2.1 .Hardwarecomposition ................................................................................ 2
2.1.1
.. Hardwaresystemcomposition ................................................................. 2
2.1.2 . CPUsystemcomposition ........................................................................ 3
2.2
. Logicoperations for instructions .................................................................... 4
2-2-1
. Basic operation of theprogrammable controller ........................................... 4
2.2.2 .Arithmeticprinciple .............................................................................. 5
2-3 : Program memory and datamemory ................................................................. 7
2.4.
. Temporary memory M
Refer toitem 3.2 ....................................................... 8
2.5 . Timer, counter T, C - Refer toitem 3.5 ........................................................... 8
2.6 . External failurememory F - Refer toitem 3.4 .................................................. 9
2.7
. Dataregister D - Refer toitem 3.3 .................................................................. 9
2.8
. Input/Output unit - Refer toitem 3.1 ............................................................ 9
....
3 . Sequence until programming ..................................................................... 10
3.1 . Assignment of theinput/output numbers ........................................................ 10
3.2
. Temporary memory M ............................................................................... 18
3.3
. Dataregister D .......................................................................................... 18
3.4 . External failurememory
F .......................................................................... 18
3.5 . Timer, counter T, C .................................................................................... 19
4 . Instructionfunctions .............................................................................. 20
4.1 . Instructions list ........................................................................................ 20
4.2
. Types and compositionof instruction words .................................................... 21
/
4.3 . Sequence instructions ................................................................................. 23
4.3.1 . AND, AN.1 ........................................................................................ 23
4.3.2 .
OR, OR1 ............................................................................................ 23
4.3.3 . LD, LDI ........................................................................................... 24
4.3.4 .
ANB ................................................................................................ 24
4.3.5 .
ORB ................................................................................................. 25
4.3.6
. MC, MCR ......................................................................................... 25

4.3.7 . SET, WST .......................................................................................... 26
4.3-8
. SFT ................................................................................................. 27
(, :
. .....................................................................................................
4-3-9 CJ -II 8
4-3-1 1 . OUT ..................................................................................................... 29
4-3-10
. PLS ................................................................................................ 28
4-4
. Data handling instructions .................................................. ....................... 30
4-4-1 . MOV ...Datatransmission ...................................................................... 30
4-4-2
. > ...Larger (dataco.rnparispn) .............................................................. 32
4-4-3
. < ...Smaller (datacomparison) ....... ?. ........................................... ?. ......... 32
4-4-4
. = ... Coincidence(datacoincidence) ....................................................... 32
..
..
.4.4. 5. + ...Addition .................................................. ............................. T ..... 33
..
.......................................................... ......... .....
4-4-6. - ... Subtraction ..........e.. 33
4-4-7 . BCD ................................................................................................... 35
4-4-8
. BIN ................................................................................................... 36
..
4-5 . Program control instructions .*....I ...... I ....... :. ................ ................................. 37
4-5-1 NOP ~I 37
.. ... *I
. ....................................................................................................... Ij /I
4-5-2. END ..................................................................................................... .. 38
5 . Programming ................................................................................................. 39
5.1 . Programmingprinciples ................................................................................ 39
5.2
. Sequenceinstructions and program.examples ................................................... 41
5.2.1
. Simplecircuits by AND and OR ............................................................... 41
5.2.2
. Complicated circuits by ANB and ORB ................................................... 42
5.2.3 . Circuitswith common control lines
............................................................. 43
. (1) Circuit separation at a contact .................................................................. 43
(2) Use
of master control MCand MCR ......................................................... 44
(3) Use
of conditionaljump CJ .................................................................... 45
5.2.4 . Timer circuit
.................. .,. ..........................................
: .......................... 46
(1)
ON delay circuit ................................................................................... 46
. (2) OFFdelaycircuit ..................................................................................... 47
..
..
(3) Long-timetimer ............................................................... ..................... 48
(4) Circuitsby analogtimer
......................................................................... 49
5.2.5 . One-shot circuits
............................................................... ; ................... 50
(1) One-shot circuit for ON time ................................................................... 50
(2) One-shot circuit for OFFtime ............................................ ;. .................... 50

... -\
,.--,
5.2.6 . Counter circuit ................................................................................... 5 1
(1) Count, reset ........................................................................................ 51
(2) Preset counter ..................................................................................... 51
5-2-7 . Flicker circuit ..................................................................................... 52
5-2-8 . Pulse circuit ....................................................................................... 52
(1)
Rise detection pulse .............................................................................. 52
(2)
Drop detection pulse ............................................................................. 52
5-2-9. Holding circuit for power failure by temporary memory ................................ 53
(1) Use of the Latch unit KL6l ..................................................................... 53
(2) Latch switch QN with K2CPU ................................................................. 53
5-2- 10 . Star-delta motor starting circuit ............................................................. 54
5-3 . Program examples for datahandling instructions .............................................. 55
5-3-1 . Switching of timer set values .................................................................. 55
5-3-2 . Output to the external indicator for the timer time limit ................................ 56
5-3-3 . Counter setting by external digital switch .................................................. 57
5-34 Addition .... .- ...................................................................................... 58
5-3-5 . Remote counter setting ......................................................................... 59
5-3-6 . Time counting for xx rnin xx sec .............................................................. 49
5-3-7 . Shift instructions ................................................................................ 64
5-3-8 . Positioning control .............................................................................. 66
(a) Positioning control by movement amount .................................................. 68
(b) Positioning control by absolute address (for full scan) ................................... 69
(b’) Positioning control by absolute address (with use of MC arid CJ) .................... 70
6 . Forms of various programming sheets ............................................................ 71
(1) Sheets form 1-1
(2) Sheets form 1-2
(3) Sheets form 2
(4) Sheets form 3
(5) Sheets form 4
(6) Sheets form 5
(7) Sheets form 6
(8) Sheets form 7
Unit arrangement table (1 / ) ........................................... 71
Unit arrangement table (2/ ) ........................................... 72
Input/output list .......................................................... 73
Programming sheet ....................................................... 74
Temporary memory sheet ............................................... 75
Data register list ........................................................... 76
External failure memory list ............................................. 77
Timer. counter list ........................................................ 78

1. Introduction
The MEESEC-K series is equipped with an instruction function convenient for machine control,
so that even complicated control can be programmed easily.
The program language uses language for sequencecontrol (a combination
of relay symbol format
and logicsymbol words), so that language of the same system as for the conventionalMELSEC-
007B and 008 is followed, but the symbolshave been partly changed to more general expressions,
Example
( Example
7
(1) ANS - ANB, ORS - ORB
(2) Input/output device name: I000 3 XOOO
i 0000 * YO00
and sequence instructions and data handling instructions have been newly added.
[Example: Universal shift, conditional jump, pulse instructions, addition and subtraction,
magnitude comparison, data movement
(MOV), etc.]
In this way, the series
K is a programmable controller with a powerful program function. Please
study this manual carefully to master the programming methods,
so that the functions can be
used efficiently.
For program input and output operations, refer to the “Handling
instructions for the programming unit”.
--.
NOTES:
(1) Thisprogramming manualcoversthe basic functions of the KOJ, KO, K1, K2, KOE and K2E.
(2) The K2CPU-S3 is provided with special funcitons.
Refer tothe “Instruction Manual
- SpecialFunctions of the K2CPU-S3” for the program-
ming of the special functions.
Refer tothe “Instruction Manual
- SpecialFunctions of the KOJ” for the programming of
the speicial functions.
“
(3) The KOJ is provided with special functions.
-1-

2, Hardware ~~ltaap~~iti~nm and operation
The hardware outlines are described to deepen the understanding for programming.
2-1. Hardware compssiticsn
2-1-1. Hardware system comp~~iti~n
The units shown in the following figure are attached to the base unit t0 compose the
system.
Peripherai support base
K6PSB
Power supply
DC 24V
AC 100 V -
Peripheral units
/output units
P o
Pu K2CPU MN6 1
I/O cab1
K61CBL
I
I
4
Fig. 2-1. Hardware system composition
‘\
2 Base Unit
f
1
i
1
i
d
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2-1-2. CPU system composition $5
The CPU operation functons are shown in the following figure;
CPU -
r-
User program
Peripherals
Memory
1 ("O~memojy KlROM 1s
K2ROM 2s
RAM memory
(KlRAM)
--
PE
inter-
face
K~ROM is
KlROM 2s
Data rnernory
I
Instructions
I register
-1
I, 1
r
I I I
e----
---
e---
-
-
h
5
Y .C
E:
u
a
a
I
T
Logic ~b
processing Register A
Input/
oulput
inter
face
a
ca
I
1 n pu t / ou t pu t
control circuit
I
I
--
_.
(Base unit)
Fig. 2-2. CPU system composition
Notes:
1. Program writing for the user program memory uses the KlRAM.
2. The CPU system composition does not coincide with the hardware.
3. A discreet circuit is obtained for K2CPU.
Simultaneous use of ROM and RAM is not possible.
-3-

2-2. Logic operations for instructions
2-2-1. Basic operation of the programmable
The basic operation of the programmable
controller is shown in the figure on the right.
This operation is the same as for
a computer
of the stored program method, and the hard-
ware composition also is similar,
so that this is
called
a programmable controller of the
quasicomputer type.
@First, the contents
of the program counter
showing the program step number aregiven
to the memory address, and the contents
are read.
@ The read memory contents are translated,
and discrimination is executed for
AND,
OR, and other instructions as well as input
and output numbers.
@ According to the discriminated source
(logic input signal to be included) and the
instructions, AND,
OR, and other logic
operations as well as output operation are
executed.
controller
@ 1 is added to the program counter contents, and specification of the next step number is ex-
Fig. 2-3. Basic logic operations
ecuted.
The above
4 operations are executed for each
step number, Le. each instruction in the
Memory
Step
number
programmable controller, and sequential
execution is executed in the sequence
of the
numbers for all step numbers stored in the
memory. This is called scanning.
The figure on the right shows the concept for
scanning. The above
4 operations are ex-
ecuted in the sequence of the program
numbers according to the program counter
contents, return to number
0 is executed when
the
END instruction is reached, and then the
sequence is repeated. This operation is called
scanning, and with one scanning, all inputs
written into the memory are taken in, logic
operations are executed, and the logic
operation results are put out to all outputs.
'
I --I_---___ ----.--
Fig. 2-4. Scanning operation
The scanning speed about corresponds to the electromagnetic relay response speed, and this is
called the logic operation speed.
As shown in the above, serial arithmetic operations are executed in the programmable controller,
but as the logic operation speed is high, all inputs aretaken in, and logic operation results are put
out to
all outputs, the operation from the outside appears to be the same parallel arithmetic
operation as for electromagnetic relays.
'i
I
I
;
-4-

2-2-2. Arithmetic principle
The arithmetic principle is explained with the
circuit shown in the figure on the right as an
XI
x2
x3
x4
XI
x2
x3
x4
'\
example.
The program for this circuit is as follows with
MELSEC-K.
The executionprocess for the circuit example
(a) is shown in
(b).
InpuUoutput
Step number Instructions number
(a) Circuit example
0 LD x1 Input of the on-off status of X1
Input of the on-off statusof X2 and
OR operation with
Xl.Xl+X2
1' OR x2
2 AND x3 Input of the on-off status of X3 and AND operation
with (X1
+ X2). (X1 + X2). X3
3
Output of the operation result (X1 + X2) X3 to Y14.
o u rr Y 14
Input (X) Output (Y) .
n
XI
x2
x3
x4
x1 +x2
I
.,
0 iIL, XI ' 1 OK' x2
( x1 sxz ) 0x3,
/
(XI +xz ) 0x3
.y 11
Y 12
y 13
Y 14
I1
'12
13
14
3 OT!T Y14
2 AND X3
X: Input selection part
Y: Output selection part
A: Register
A (answer register)
B: Register B (auxiliary register)
'Fig.
2-5. Arithmetic principle
.LU: Logic processing unit J
IR: Instructions register
.(b) Execution process
Explanation of the arithmetic principle
The execution process for this program and this hardware compostion
is as follows.
Step
0 LD X1
@The program number 0 isread from the memory, the instruction LD is stored in the instructions
-5-

register IW, and the input/output number X1 is sent to the input selection part.
*The same applies for subsequent program.
@ X1 is selected by the input selection part X.
@ The on-off status of X1 is taken in, and it is stored in register B via register A.
@ X2 is selected by the input selection part X.
@ The on-off status of X2 is taken in and stored in register A.
@ The contens of X2 in register A and X1 in register B are sent tothe logic processing unit, LU,
@ This operation result (X1 + X2) is sent to register By where it is stored, Register B becomes
1 ORX2
OR operation is executed, and the operation result for (X1 + X2) is obtained.
the answer register.
2 ANDX3
@ X3 is selected by the input selection part X.
@ The on-off status of X3 is taken in and stored in register A.
@ Thecontents of (X1 + X2) inregister B and X3 inregister A are sent tothe logicprocessing
unit
LU, AND operation is executed,and the operation result for (Xl + X2) X3 is obtained.
@ This operation result (X1 + X2) X3 is sent to register By where it is stored. 1
@ Y14 is selected by the output selection part Y.
@ The operation result (XI + X2) X3 from register B is sent to output Y14.
Y14 has an output register, where this operation result is stored and kept.
Theabove example treated
X and Y asinput and output, but seen from the logic processing
unit
(LU), X and Y are preceding units providing conditions or data for logic processing
and units for output of the operation results. These units seen from the
LU are called
“devices”. There are the following types of devices:-
3 OUTY14
X ........ Input
Y ......... output
M ........ Temporary memory
T ......... Timer
C ......... Counter
F
......... External failure memory
D
........ Data register
Input and output
by the LU.
K ......... Constant Only input by the
LU.
-6-