Campbell Scientific CR10 CR10 Measurement and Control - Page 139

22 and23

are

connected,

and

12 Reps are

requested.

Eight channels from the

first

SWBA

and the

first

4

channels from

the second

SWBA

willbe

read.

Only

one

Function

Option

(Parameter

3)

may be

specified

per P102 Instruction.

lf all

4

functions

are desired,

4

P1O2Instructions

are

required.

Function Option 0 provides

the

state of

the

signal

at

the

time

P102 is

executed.

A

1

or

0

corresponds

to

high

or

low

states,

respectively.

Function

Option

1

provides signal duty cycle.

The

result

is

the

percentage

of

time

the

signal

is

high during

the sample

interval.

Function Option 2 provides

a

count

of

the

number of positive transitions of

the

signal.

Function Option

3

provides the signature

of

the

SWSA

PROM.

A positive

number (signature)

indicates

the

PROM

and

RAM are

good,

azero

(0) indicates bad PROM, and

a

negative

number indicates

bad

RAM.

Function Option

3

is not used routinely, but is helpful

in

"debugging".

Only

one

Rep is required

for

Option

3.

Parameter 4 specifies the

first

SWBA

channelto

be

read

(1..8).

One

or

more sequential

channels

are

read

depending on

the

Reps.

To

optimize

program etficiency,

the

sensors should

be

wired sequentially.

Data are

stored

in sequential input locations,

starting

at

the

location

specified

in Parameter

5.

The

number

of

input locations

consumed

is

equal to

the

number

of

RePs.

The scaling

multiplier and

offset

(Parameters

6

and 7) are applied

to

all

readings.

lf

a

multiplier

is not entered, all readings are set to

0.

lf

the

SWSA

does

not respond, -99999

will

be

loaded into input

locations.

Modules which do

not respond when addressed by the

datalogger

are possibly wired or addressed incorrectly.

Verify the address

specified

in Parameter

2

corresponds to the

jumper

setting and all

connections

are correct

and

secure.

See

the

SDM-SW8 Manual

for

examPles.

SECTION

9.

INPUT/OUTPUT

INSTRUCTIONS

PARAM.

DATA

NUMBER

TYPE

DESCRIPTION

Number of Channels

Module

Address

(00..33)

Function Option

(O=State, 1=DutV,

2=Counts,

3=Signatu re)

SDM-SW8A Starting

Channel

(1..8)

Starting input location

Mult

Offset

103

SDM-AO

**'

FUNCTION

lnstruction

103 is used to activate

a

SDM-AO4

connected

to ports

C1, C2, and C3.

There

are 4 analog voltage

outputs

per SDM-

AO4.

The output

voltages

in millivolts must be

stored

in

4 adjacent input locations starting with

the

location

entered

in parameter

3.

Four reps

are

required

for each SDM-AO4.

Every

4

reps

another device

at

the

next higher

address

is

selected.

PARAM.

DATA

NUMBER

TYPE

DESCRIPTION

2

Reps (# of outputs)

2

Address (Base

4)

4

Starting input location

C1 is Data line

C2

is Clk/Hand

Shake

line

C3 is SDE (Enable) line

***

104

SDM-CD16AC

***

FUNCTION

The

SDM-CD16AC

Control

Port Expansion

Module

has

16

digitalcontrol

ports with drivers.

Each port

can

be

controlled

by a datalogger or

controlled manually

with

an override toggle

switch.

Each port

can

be thought of as a switch

to

ground; closed when active, open when

inactive.

The

primary

function

is

to activate

AC

powered

external

relays, solenoids,

or

resistive

loads under datalogger control.

The SDM-CD16AC is

a

synchronously

addressed datalogger

peripheral.

Datalogger

control ports

1,

2

and

3

are

used

to

address

the

SDM-CD16AC

then

clock out the desired state

of each

of

the

16

control

pods.

Up

to

16

SDM-

01:

o2'"

03:

05:

06:

07:

2

2

2

2

4

FP

FP

***

01

02

03

9-15

Campbell Scientific CR10 CR10 Measurement and Control - Page 139

willbe, azero, pods.

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