11 chapter06 slc_int_float_mov_mvm_fa14

SLC500 and LogixPro
The Integer File
Data File #7 (N7)
Supplement to your textbook
Northampton Community College 1

SLC-500 Default File Types
FILE TYPE IDENTIFIER FILE
NUMBER
Output O 0
Input I 1
Status S 2
Bit B 3
Timer T 4
Counter C 5
Control R 6
Integer N 7
Float Point * F 8
* Available in SLC-5/03 OS301, OS302 & SLC-5/04 OS400, OS401 &
SLC-5/05 processors

SLC-500 User Defined File Types
NUMBER
Bit B 9 - 255
Timer T 9 - 255
Counter C 9 - 255
Control R 9 - 255
Integer N 9 - 255
Float Point * F 9 - 255
String* St 9 - 255
ASCII * A 9 - 255
File #9 has a special purpose. It is called the “Computer Interface
File” (CIF) and is used when communications is required between
early AB PLCs
Note: LogixPro does not allow user defined files.
SLC-5/05 processors

Integer File – Data File #7

The Integer file is a file of 256, 16-bit words. This file can be used, as
needed, for user storage of integer data. The default radix is decimal,
but it can be changed to binary, octal, hex/BCD or ASCII.

The ControlLogix equivalent would be a tag of data type INT

Addressing the Integer File

Addressing the Integer file uses the same addressing format previously
learned.

Following are some examples and their location in the Integer file. (The
Bit file can be addressed in the same manner).
 N7:0 – Refers to the default integer file, Word 0
 N7:3 – Refers to the default integer file, Word 3
 N7:2/3 – Refers to the default integer file, Word 2, Bit 3

SLC500
Floating Point File
Not available in LogixPro
Data File #8 (F8)
Supplement to your textbook

SLC-500 Default File Types
NUMBER
Output O 0
Input I 1
Status S 2
Bit B 3
Timer T 4
Counter C 5
Control R 6
Integer N 7
Float Point * F 8
SLC-5/05 processors

SLC-500 User Defined File Types
NUMBER
Bit B 9 - 255
Timer T 9 - 255
Counter C 9 - 255
Control R 9 - 255
Integer N 9 - 255
Float Point * F 9 - 255
String* St 9 - 255
ASCII * A 9 - 255
File #9 has a special purpose. It is called the “Computer Interface
File” (CIF) and is used when communications is required between
early AB PLCs
Note: Floating Point and user defined files are not available in LogixPro
SLC-5/05 processors

Floating Point File – F8
Format Explanation
Ff:e F Floating Point file
f
File number. File number 8 is the default file number (i.e. F8). A
user defined file number from 9 to 255 can be used if additional
storage is required (e.g. F12 or F25)
: Element (word) delimiter
e
Element (word) number. The element (word) number range is
from 0 to 255 with each element (word) using two 16-bit words.
As a result they are non-extended 32-bit numbers.

The Floating Point File is used whenever fractional numerical data or numerical
data less than -32,768 or greater than 32,767 are needed.

Floating Point data has two parts; an Integer and an Exponent. Each word can
store values such as: 23.45987

Floating Point data can only be addressed to word level. An error will occur if a
Floating Point address is addressed to bit level.

All arithmetic instruction can be used with Floating Point numbers.

The ControlLogix equivalent would be a tag of data type REAL.
Valid address – F8:4 Invalid – F8:5/6 (no bit level)

Data Manipulation
Chapter 06 Section 6-5-6
Supplement to your textbook.
Your textbook does not talk in any great detail
about the Move (MOV) and Masked Move
(MVM) instructions.

Data Manipulation Instructions

Data manipulation instructions enable the programmable
controller to manipulate data stored in memory.

This extra characteristic gives the PLC capabilities that go
far beyond the conventional relay equivalent instructions.

Data manipulation involves transfer of data and operation
on data with math functions, data conversion, data
comparison and logical operations.

Data Files, Words and Bits

Words of data memory, in singular form, can be referred to
either as registers, elements or as words, depending upon
the PLC/PAC manufacturer.

The terms table, array or file are generally used when a
consecutive group of related data memory words is
referenced. A group of consecutive elements or words in the
SLC-500 family are referred to as a file, in a ControlLogix
controller they are referred to as an array, in Siemens it is
called a table or an array.

The data contained in files and words will be in the form of
binary bits represented as a series of 1’s and 0’s.

Data Files, Words and Bits

This is a pictorial representation of a file
File, Array or Table

Data Manipulation Instructions

Data manipulation instructions allow the movement,
manipulation or storage of data in either single or multiple
word groups from one data memory area of the PLC to
another.

The use of data manipulation instructions in applications
that require the generation and manipulation of large
quantities of data generally reduces the complexity and
quantity of the programming required.

Data Transfer Operations

Data transfer instructions simply involve the transfer of the
contents from one word or register to another.

When new data replaces existing data, the process is
referred to as writing over the existing data.

Data transfer instructions can address almost any location
in memory. That location may be the preset word for a timer
or counter or even an output register that controls a seven-segment
display or a series of output devices.

Data Transfer Concept
User defined Integer
file N10:7 starts out
with no data.
After the data
transfer occurs,
word N10:7 will
contain the same
data as word
N7:14.
Data is to be transferred from a word in the
default Integer file N7:14 to a word in the
user defined Integer file N10:7.

Move (MOV) Instruction

Allen-Bradley series controllers use a block formatted Move (MOV)
instruction to perform data moves.

The MOV instruction is an output instruction that moves the value stored
in one word to another word. It doesn’t actually move the data, it makes
a copy of the data from the source to the destination.

The MOV instruction has two parameters:
 Source
 Destination
Source specifies the
word containing the
data to be moved.
Dest specifies the
word where the data
should be moved.
Place holder that
will display the
value stored in
these words when
monitoring online.


The instruction parameters of a MOV instruction have several rules:
 The destination (Dest) must always be a WORD level address or WORD
level tag.
 The Source can be a WORD level address, a WORD level tag or a program
constant.

MOV instructions can be conditional or unconditional.
Conditional MOV
Unconditional MOV


When the rung is true, the value
stored at the Source address, N7:56,
is Moved (copied) into the Dest
address, C5:34.PRE.

When the rung goes false, the Dest
address will retain the value unless it
is changed somewhere else in the
program.

Siemens Move (MOVE) Instruction

When the Enable (EN) input becomes true, the data stored in the IN tag
is moved to the OUT tag.

The Enable Out (ENO) will be a logic 1 if the EN input is true and the
MOVE occurred without error.

MOVE instructions can be conditional or unconditional.

Lets Build the Following Circuit

You were assigned the task of implementing a new circuit that
can be used to control a pump that is being used to pump sugar
syrup or molasses. Because these ingredients have a different
viscosity, the pump needs a startup delay of 10-seconds when
pumping sugar syrup and 15-seconds when pumping molasses.

Two separate latching N/O selector switches are used to select
the correct time-delay. One for selecting the time delay for sugar
syrup and one for selecting the time delay for molasses. The user
should not be able to start the system if both time-delays are
selected at the same time.

Nothing should start unless the Start push button is pressed and
everything should stop if the Stop push button is pressed.

Once the Start push button is pressed, if the operator attempts to
change the delay time, the setting should not take affect. For the
new setting to take affect, the Stop push button must be pressed
and the system must than be restarted.

Preload the delay times into the appropriate tags before
downloading the program.

Lets Build the Following Circuit – I/O Assignment

Field device assignment:
 Start Push Button – Wired to IN9 of the input module in slot 03
 Stop Push Button – Wired to IN10 of the input module in slot 03
 10-Second selector – Wired to IN4 of the input module in slot 03
 15-Second selector – Wired to IN6 of the input module in slot 03
 Pump motor starter – Wired to OUT7 of the output module in slot 09

Circuit that Changes the Preset of a Counter with a MOV

Masked Move (MVM) Instruction
(Not in the IEC Standard)

The Masked Move (MVM) instruction is slightly different
from the MOV instruction in that a mask word is involved in
the MOV.

The data being moved must pass through a mask to get to
the Dest address.

In the SLC500, the MVM instruction is used to move (copy)
only the desired bits from a 16-bit word from the Source to
the Dest by masking the bits that should not be moved.

In the ControlLogix, the MVM instruction is used to move
(copy) only the desired bits from a tag of data type SINT,
INT or DINT from the Source to the Destination by masking
the bits that should not be moved.


The MVM instruction has three parameters:
 Source
 Mask
 Dest

The parameters have several rules:
 The Source and Dest must be WORD level addresses.
 The Mask can be a WORD level address or a program constant, preferably
in Hexadecimal.
Source must
be a WORD
level address
Mask can be a
hexadecimal number or
a WORD level address
Dest must be a WORD
level address
These fields
display the
values stored
in the
parameter
addresses


The Mask can be though of as a filter. The data in the Source word will pass
through this filter (mask) and the value exiting the filter (mask) will be stored in
the Dest word.

Think of the mask as a plate with 16-holes (32-holes if there are 32-bits) and a
butterfly valve in each hole; like a choke on an old style carburetor. If the valve is
closed, nothing can get through (a zero). If the valve is open, an object can drop
through the hole (a one).
The valve is
open a one (1)
and data can
pass through
The valve is
closed a zero (0)
Data cannot
pass through
To the destination
Word
To the destination
Word
To the destination
Word
The mask shown would be: 1110000010000010 or E082h

Entering a Constant Mask Value

When entering the mask value as a constant it can be
entered as a binary, octal or hexadecimal value. It is usually
best to enter a constant as a hexadecimal number.

Entering mask values as constants is done in the following
formats:

SLC500
 Hexadecimal value: 0FFA3h
 Octal value: 2273o
 Binary value: 1010001100111100b

ControlLogix
 Hexadecimal value: 16#FFA37BC8
 Octal value: 8#2273
 Binary value: 2#101000110011100

These statement are not always true depending
upon what version of RSLogix 500 is being used

The Mask can be entered as an address or tag, or as a program
constant in hexadecimal, binary or octal.

Where there is a ‘1 in the mask, data will pass from the Source to the
Dest. Where there is a ‘0’ in the mask, data from the Source will not
pass to the Dest. The bit positions in the Dest that are masked will retain
whatever state they were in before the MVM occurred.
Mask as a hex value: 7AB4h
If the hex value starts with a letter,
a leading ‘0’ will be added: 0AB74h
Mask as an address: B3:16
The value stored in B3:16 = 71CFh

1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 Destination before the MVM

Mask operation example
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Source
1 1 1 0 0 0 0 0 1 0 0 0 0 1 0 0 Mask
1 0 1 0 1 1 0 0 1 1 0 0 1 0 0 0 Destination after the MVM

MVM Example

In the SLC500 MVM all 16-bits of the input module in slot 1 are being
moved through a mask and storing the result in N7:0.

The mask is “filtering out” everything except the devices wired to IN
terminals, 4, 5, 6, 7, 8 & 11.

In the ControlLogix MVM all 16-bits of the input module in slot 10 of the
local rack are being moved through a mask and stored in the destination
tag.

The mask is “filtering out” everything except the devices wired to IN
terminals, 0, 1, 3, 5, 12, 13, 14, 15.
0000
MVM
Masked Move
Source I:1.0
0<
Mask 09F0h
2544<
Dest N7:0
0<

ControlLogix Masks
DINT mask (32-bit)
INT mask (16-bit)
SINT mask (8-bit)

11 chapter06 slc_int_float_mov_mvm_fa14

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11 chapter06 slc_int_float_mov_mvm_fa14