Campbell CR7 Manuel de l'opérateur télécharger pdf

OV-1

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEW

The CR7 Measurement and Control System combines precision measurement with processing and

control capability in a battery operated system.

Campbell Scientific, Inc. provides three documents to aid in understanding and operating the CR7:

1. This Overview

2. The CR7 Operator's Manual

3. The CR7 Prompt Sheet

This Overview introduces the concepts required to take advantage of the CR7's capabilities. Hands-on

programming examples start in Section OV4. Working with a CR7 will help the learning process, so

don't just read the examples, turn on the CR7 and do them. If you want to start this minute, go ahead

and try the examples, then come back and read the rest of the Overview.

The sections of the Operator's Manual which should be read to complete a basic understanding of the

CR7 operation are the Programming Sections 1-3, the portions of the data retrieval Sections 4 and 5

appropriate to the method(s) you are using (see OV5), and Section 14 which covers installation and

maintenance.

Section 6 covers the details of serial communications. Sections 7 and 8 contain programming examples.

Sections 9-12 have detailed descriptions of the programming instructions, and Section 13 goes into

detail on the CR7 measurement procedures.

The Prompt Sheet is an abbreviated description of the programming instructions. Once familiar with the

CR7, it is possible to program it using only the Prompt Sheet as a reference, consulting the manual if

further detail is needed.

Read the Selected Operating Details and Cautionary Notes at the front of the Manual before using the

CR7.

OV1. PHYSICAL DESCRIPTION

The CR7 features a modular, multiple

processor design that provides precision

measurement and control capability in a rugged,

battery operated system. Control Module

functions include real-time task initiation,

measurement processing, data storage,

telecommunications, and keyboard/display

interaction. The I/O Module performs all analog

and pulse signal measurement functions as well

as the analog and digital control output

functions. The I/O Module contains its own

processor card, a precision analog interface

card, and seven card slots which can

accommodate any combination of I/O Cards.

Sensor leads are connected to the I/O cards via

screw terminals.

A maximum of four I/O modules, separated by

up to 1,000 feet, may be connected to a single

Control Module in applications that require

distributed measurement capability.

OV1.1 700X CONTROL MODULE

Contains the CPU card, with 24K of system

PROM and 40K of RAM; the serial interface

card for peripheral communication and

connection of up to four I/O Modules; and the

keyboard display card. Two slots are present

for optional RAM expansion. The system's 2.5

Ahr lead-acid batteries and AC charging

circuitry are also contained in this module.

The CS I/O 9-pin port provides connection to

data storage peripherals, such as the

SM192/716 Storage Module, and provides

serial communication to computer or modem

devices for data transfer or remote

programming (Section 6). This 9 pin port does

NOT have the same pin configuration as the

1 2 3 4 5 6 ... 16 17

Résumé du contenu

Page 1 - OV1. PHYSICAL DESCRIPTION

OV-1CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWThe CR7 Measurement and Control System combines precision measurement with processing andcontrol capabi

Page 2

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-10Tables OV3-1 and OV3-2 summarize theKeyboard Commands and Control Modes usedto program the CR7, monito

Page 3 - CONCEPTS

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-11TABLE OV4-1. Thermocouple Measurement Programming ExampleTURN ON THE POWER SWITCH AND PROCEED AS FOLL

Page 4

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-12TABLE OV4-2. Using *6 Mode to Observe Example TC Measurements(User with Model 723-T RTD Card)DisplayI

Page 5

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-13TABLE OV4-4. Example Programming to Obtain Five Minute AveragesDisplayID:Data KeyDisplayID:Data Key D

Page 6

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-14TABLE OV4-5. Using *7 Mode to View Values in Final StorageDisplayID:Data KeyDisplayID:Data Key Descri

Page 7 - OV3. PROGRAMMING THE CR7

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-15OV5. DATA RETRIEVAL OPTIONSThere are several options for data storage andretrieval. These options ar

Page 8

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-16DisplayStorageModuleCard StorageModuleMultidropModemShorthaulModemRF Modem PhoneModemSatelliteInterfac

Page 9 - OV4. PROGRAMMING EXAMPLE

Electrical specifications are valid for over a -25° to +50°C range unless otherwise specified.Analog Inputs(723T or 723 Card specifications below;726

Page 10 - 32 give the

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-2RS232 9 pin serial ports used on manycomputers.The SDM terminals adjacent to the serial portallow conne

Page 11 - , advance to next

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-3CR7RELIEF VALVECAUTIONPRESS BUTTONBEFOREUNLOCKING CASEFIGURE OV1-1. CR7 Measurement and Control Syste

Page 12

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-412RTD 34MADE IN USA+12720 I/O MODULEANALOG INTERFACEH H H H1234724 PULSE COUNTERHL HL HL HL HL H

Page 13

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-5INPUT/OUTPUTINSTRUCTIONSSpecify the conversion of a sensor signalto a data value and store it in InputS

Page 14

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-63. Final Storage - Final, processed values arestored here for transfer to printer, solid stateStorage M

Page 15 - OV5. DATA RETRIEVAL OPTIONS

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-7Table 1.Execute every x sec.0.0125 < x < 6553Instructions are executedsequentially in the order t

Page 16 - 700X CONTROL MODULE

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-8OV3.1 FUNCTIONAL MODESUser interaction with the CR7 is broken intodifferent functional MODES, (e.g., p

Page 17

CR7 MEASUREMENT AND CONTROL SYSTEM OVERVIEWOV-9OV3.4 INSTRUCTION FORMATInstructions are identified by an instructionnumber. Each instruction has a n