Remote-processing CX-10 Manuel d'utilisateur télécharger pdf (Page 16)

SAVING DATA TO REGISTERS SECTION 3

Page 3-1

INTRODUCTION

SAVING DATA TO REGISTERS SECTION 3

There are 2 numerical formats data can be saved as:

Integer and Floating Point. Additionally, there are two

types of media this data can be saved to: EEPROM and

SRAM. Data is stored to 4 groups of registers, described

below.

All registers described in this section are accessible over

modbus.

Number Types

The CX-10 works with both types of number formats.

Each type has features and limitations.

Integers are in what is known as a 16 bit format and

allows numbers between 0 and 65,535. This format is

handy for bit manipulation (such as opto input or relay

status). It takes less memory than floating point and is

faster to work with. Its primary limitation is the limited

number range it can store. It cannot store negative

numbers.

When using Basic (another hidden format), integers and

floating point numbers are automatically converted into

native format. In Basic, both integers and floats are the

same.

Floating point numbers are stored in a format known as

IEEE-754, 32 bit. This is a standard format used by

many computers. These numbers take longer to work

with and require more memory. This 32 bit data length

is a single precision format. It can store floating point

numbers in the range of +/- E

127

. As a matter of practical

use, it can store up to 7 digits of data plus an exponent.

Any extra numbers are not to be relied upon.

This format has the unfortunate characteristic of

returning numbers that are close, but not quite the same

as the original. Some examples:

Original IEE-754 format

80.3 80.30001

80.6 80.59999

For all intents and purposes the differences are not

significant, less than 0.0001245%.

We used terminology such as “faster”, “longer”, more

and less memory. These are relative terms. For the most

part you can use floating point numbers. Use integers if

you run out of floats, keeping in mind the range of values

it can store (0-65535).

STORAGE MEDIA

Integer and floating point numbers are stored in SRAM

and EEPROM. SRAM is temporary, volatile memory in

the CPU. When the CPU cycles power or resets, number

contents are reset to 0. Registers may be written to

SRAM an unlimited number of times.

EEPROM’s retain data after power cycling. EEPROM

data is stored in U2 on the CX-10 board. Registers may

be written to 1,000,000 times before it wears out.

Both SRAM and EEPROM may be read an unlimited

number of times.

When should SRAM storage be used? When its contents

is expected to change frequently. Frequently, in this

case, means once/minute or so. Looked at from a

different way, writing to EEPROM once/minute means

the part will “wear out” in about 1.5 years.

SRAM is useful for holding data used in modbus

communications. EEPROM is useful for storing

constants, such as time delays, offsets and multipliers.

DATA REGISTERS

There are 4 groups of data, or numeric, storage registers

shown in the table below. Numeric ranges are inclusive,

meaning you can use all the numbers shown.

4001-4256 EEPROM Integers

4501-4628 SRAM Integers

7033-7096 SRAM Floating point

7101-7356 EEPROM Floating point

You have 256 integer and floating point numbers that

can be stored in EEPROM. You have 128 integers and

64 floating point numbers in volatile SRAM.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 43 44

Commentaires sur ces manuels

Pas de commentaire

Lg OLED65C7Y User Manual (40 pages)

Brand: Lg | Category: No info | Size: 15.42 MB |

Printed in Korea

OLED55C7*

OLED65C7*

COMPONENT INAV IN

*MFL69649013*

.היזיוולטה

.תוריש תלבקל השקב תעב ימוקמה

ינוציח הטילש ןקתה תרדגה

תויעב ןורתפ

חותפ דוק תנכות לע העדוה יטרפ

תונוישיר

MAGIC קוחר טלש תונוכת

(תועדוה) םירוביח

ריקה לע הנקתה

קיטסיו‘גה ןצחלב שומיש

ןחלוש יבג לע הנקתה

דרפנב השיכרל

התזזהו היזיוולטה תמרה

תוחיטב תוארוה !תוריהז

 5*%ʡʶʮʡʬʲʥʴʤʦ

01ʭʩʰʥʺʰ

HEBʺʩʸʡʲ

ʩʰʥʶʩʧʤʤʸʷʡʤʯʷʺʤʺʸʣʢʤ

ʣʡʬʡʯʴʩʡʭʩʮʢʣʬ

ʤʨʩʬʷʸʥʣʩʹʬʥʷʥʨʥʸʴ

ʺʸʥʹʷʺʬʹʭʩʸʨʮʸʴ

ʺʥʣʥʷʴʺʮʩʹʸ

ʧʥʷʬʤʡʹʧʮRS-232Cʺʥʸʥʶʺ

ʭʩʰʶʧʬʩʣʥʷ

ʯʷʺʤʺʸʣʢʤ

ʩʰʥʶʩʧʤʤʸʷʡʤ

Lg OLED65C7Y User Manual (41 pages)

Brand: Lg | Category: No info | Size: 17.50 MB |

Printed in Korea

OLED55C7*

OLED65C7*

COMPONENT INAV IN

*MFL69649013*











LIVE ZOOM















ΔϳΑέόϟ΍ΔϳΑέόϟ΍

ί΍έρϟ΍ΏγΣ

100αϣΎΧϟ΍ϕΎρϧϟ΍10100ϱέηϋ20

00000000

SERVICE ONLY

RS-232C IN

RS232CϝΑΎϛϊϣRS-232C

΢ϳΗΎϔϣϟ΍ίϭϣέ

More products and manuals for Unknown LG

Models	Document Type
L1950H-GN	User Manual LG L1950H-GN دليل المالك, 22 pages
50PB560B	User Manual LG 50PB560B,50PB56000GI دفترچه ی راهنما, 46 pages
PSF1032A	User Manual LG PSF1032A Owner’s Manual, 20 pages
GR-G277STW	User Manual LG GR-G277STW manuel du propriétaire [el] , 31 pages
43UF640T	User Manual LG 43UF640T,49UF640T دفترچه ی راهنما, 44 pages
MF-FM33S1K	User Manual LG MF-FM33S1K Owner’s Manual, 58 pages
FH6G1BCHK6N	User Manual LG FH6G1BCHK6N,FH6G1BCHK6N-F8K5XNK4 manuel du propriétaire, 108 pages
MF-PE500N6W	User Manual LG MF-PE500N6W Owner’s Manual, 27 pages
LHD427	User Manual LG LHD427 دليل المستخدم [en] , 4 pages
OK75	User Manual LG OK75 manuel du propriétaire, 4 pages
LWC186NBAB3	User Manual LG LWC186NBAB3 Owner’s Manual [en] , 23 pages
84LM9600	User Manual LG 84LM9600 Owner's manual, 177 pages
PS-S200WC	User Manual LG PS-S200WC دليل المالك, 28 pages
WF-T1235TP	User Manual LG WF-T1235TP Owner’s Manual, 36 pages
LAS550H	User Manual LG LAS550H دليل المالك, 4 pages
CJ44	User Manual LG CJ44 دليل المستخدم, 16 pages
ARNU07GB1G2.ENWALEU	User Manual LG ARNU12GB1G2.ENWALEU,ARNU07GB1G2.ENWALEU manuel du propriétaire [fr] , 13 pages
KD-824ST	User Manual LG KD-C704S,KD-824ST,KD-824SW دفترچه ی راهنما [en] [ja] [zh] , 41 pages
LF25RLTS-LF25FLTS	User Manual LG LF25RLTS,LF25RTS,LF25RLTS-LF25FLTS دفترچه ی راهنما, 24 pages
LHD457	User Manual LG LHD457 دليل المالك, 44 pages