Campbell Scientific SC115 User Manual

SC115 CS I/O 2G Flash Memory

Drive with USB Interface

Revision: 3/12

Copyright © 2010-2012

Campbell Scientific, Inc.

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SC115 Table of Contents

PDF viewers: These page numbers refer to the printed version of this document. Use the
PDF reader bookmarks tab for links to specific sections.

1. Introduction..................................................................1

2. Cautionary Statements................................................1

3. Initial Inspection ..........................................................1

4. Quickstart.....................................................................1

5. Overview.......................................................................2

5.1 Memory Drive Function ...........................................................................2

5.2 Communications Interface Function.........................................................3

6. Specifications ..............................................................3

7. Setup.............................................................................3

7.1 SC115 Settings (Optional)........................................................................3

7.2 PC Preparation..........................................................................................4

7.3 Datalogger CRBasic Programming ..........................................................5

8. Data Storage Modes ....................................................6

8.1 Data Collection Modes .............................................................................6

8.1.1 Programming for the Data-Collection Modes.................................6

8.1.2 Multiple Dataloggers ......................................................................6

8.2 Resident Mode..........................................................................................7

8.2.1 Programming for the Resident Modes ............................................7

9. Retrieving Data from SC115 .......................................7

10. Datalogger Programming.......................................... 8

10.1 DataTable() and TableFile() Instructions ...............................................8

10.1.1 FileName.....................................................................................10

10.1.2 Options........................................................................................10

10.1.3 MaxFiles .....................................................................................11

10.1.4 NumRecs/TimeIntoInterval Parameter .......................................11

10.1.5 Interval Parameter.......................................................................12

10.1.6 Units Parameter...........................................................................12

10.1.7 OutStat Parameter .......................................................................12

10.1.8 LastFileName Parameter.............................................................12

i

SC115 Table of Contents

11. Serial Communications Interface Function ...........17

12. Troubleshooting Memory Drive..............................17

10.2 CardFlush Instruction........................................................................... 13

10.3 CardOut Instruction ............................................................................. 13

10.4 Powerup.ini .......................................................................................... 13

10.5 Example Programs............................................................................... 13

10.5.1 Data Collection Mode Examples................................................ 13

10.5.1.1 Standard Data Collection Mode........................................ 13

10.5.1.2 Enhanced Data Collection Mode Example....................... 14

10.5.2 Resident Interval Mode Example............................................... 14

10.5.3 Resident Record Number Mode Examples ................................ 15

10.5.4 CardFlush Example.................................................................... 16

10.5.5 CardOut Example....................................................................... 16

12.1 Preventing Data Corruption ................................................................. 17

12.2 Skipped Scans ...................................................................................... 18

12.3 SC115 with Large Data Compliment................................................... 18

12.4 Data Collection Speed.......................................................................... 18

12.4.1 CF Card and Collection Speed ................................................... 18

12.4.2 Data Type Collection Speed....................................................... 19

12.5 Slow PC Boot-up ................................................................................. 19

12.6 Write Failure ........................................................................................ 19

13. Troubleshooting Communications Interface.........20

13.1 Breaking the Physical Comms Link..................................................... 20

14. Technical Reference ................................................20

14.1 SDC Addressing .................................................................................. 20

14.2 Formatting Memory ............................................................................. 20

14.3 Operating System................................................................................. 20

15. Glossary....................................................................21

List of Tables

1. PC Driver Installation for SC115 as Memory Device................................ 4

2. PC Driver Installation for SC115 as Communications Interface ............... 5

3. Function of NumRec, TFInterval, and TFUnits Parameters....................... 9

4. Synopsis of MaxFiles Parameter Options................................................ 11

ii

SC115 CS I/O 2G Flash Memory Drive with USB Interface

1. Introduction

The SC115 is a portable 2-GB memory drive (thumb drive) compatible with
Campbell Scientific CRBasic dataloggers that have a CS I/O port. It shuttles
data, OS, and program files between Campbell Scientific dataloggers and a PC,
or it remains connected to the datalogger to augment data memory. It can be
used in tandem with a CompactFlash (CF) card.

The SC115 can also be used as a CS I/O to USB communications interface.

2. Cautionary Statements

• Corruption of multiple data files may occur if the SC115 is removed from

the host datalogger or PC during data transfer.

• Do not disconnect the SC115 from the host while the LED is flashing or

lit. Always use the Safely Remove Hardware utility provided in the
Windows operating system prior to removal from a PC.

• Some data collection modes increase the risk of inadvertently

disconnecting the SC115 from the datalogger during data transfer. See
Section 12.1, Preventing Data Corruption to assess the risk in a particular
application.

• Always click Disconnect in the datalogger support software prior to

removing the SC115 when it is a communications interface. See Section
11, Serial Communications Interface Function for communication
interface details and precautions.

3. Initial Inspection

Upon receipt of the SC115, inspect the packaging and contents for damage.
File damage claims with the shipping company. Immediately check package
contents against the shipping documentation. Contact Campbell Scientific
concerning discrepancies.

4. Quickstart

The primary function of the SC115 is as a portable memory drive (thumb
drive) to collect data from compatible Campbell Scientific dataloggers (see
Section 6, Specifications for compatibility). Simply connect the CS I/O
connector of the SC115 to the CS I/O connector of a properly programmed
datalogger, and data are transferred automatically.

Memory drive setup (see Section 7, Setup for complete instructions):

• SC115 — shipped from the factory ready for use in most applications.

1

SC115 CS I/O 2G Flash Memory Drive with USB Interface

• PC — requires software drivers be installed. See Section 7.2, PC

Preparation. Install drivers BEFORE plugging in the SC115. When these

drivers are installed, the SC115 performs on the PC as a memory drive
(thumb drive).

• Datalogger — as shown in the following code example, insert the

TableFile() instruction into the datalogger CRBasic program immediately
following the DataInterval() instruction. This configuration enables the
SC115 to collect the newest data in the data collection mode (see Section

8.1, Data Collection Modes). Note that “USB:” is the correct drive name.
For complete programming examples, see Section 10.5, Example
Programs.

DataTable (Test,1,-1)
DataInterval (0,60,Min,0)
TableFile ("USB:"+Status.SerialNumber+"_Filename",8,-1,0,0,Min,0,0)
Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

5. Overview

The SC115 is a portable 2-GB memory drive (thumb drive) compatible with
CRBasic dataloggers that have a CS I/O port. It can be used in tandem with a
CompactFlash (CF) card. It shuttles data, OS, and program files between
Campbell Scientific dataloggers and a PC, or it remains connected to the
datalogger to augment data memory.

The SC115 can also be used as a CS I/O to USB communications interface.

The SC115 has a USB 2.0 compatible connector used to attach the SC115 to a
PC USB port to allow stored data files to be copies to the PC. It also has a CS
I/O 9-pin connector that attaches the SC115 to the CS I/O port of compatible
Campbell Scientific dataloggers. The SC115 may be connected directly to a
PC or datalogger, or connected through the supplied extension cables.

The 5 Vdc (pin 1) of the CS I/O interface determines whether the SC115 is
used as a memory drive or as a CS I/O-to-USB communications interface. If
the 5 Vdc pin is not driven high, it acts as a memory drive. If the 5 Vdc pin is
driven high by the datalogger, the SC115 will serve as a communications
interface.

5.1 Memory Drive Function

As a memory drive, when the SC115 is attached to the CS I/O port of a
datalogger, the LED (Light Emitting Diode) first flickers as the SC115 and
datalogger negotiate communications. The datalogger determines if the
TableFile() instruction is set to write to an SC115. The LED flickers as the
datalogger copies data files to the SC115. The LED stops flickering when data
transfer is complete, and the SC115 can safely be disconnected.

As a memory drive, when the SC115 is attached to a PC, the LED first lights
solidly as it communicates with the PC to obtain a unique address. Once
negotiations are finished, the LED extinguishes and the SC115 appears as a
removable drive in Windows® Explorer. Data files on the SC115 can be
copied or moved to other drives. Files, such as CRBasic program files or
operating system files, can be copied or moved from PC drives to the SC115.

2

5.2 Communications Interface Function

As a communication device, the SC115 provides pass-through
communications.

6. Specifications

Features

Compatibility
Dataloggers: CR800 / 850

CR1000, CR3000
CR5000, CR9000X

SC115 CS I/O 2G Flash Memory Drive with USB Interface

• Portable 2-GB memory drive

• Shuttles data, OS, and program files or remains connected to

datalogger to augment memory

• Can be used as a CS I/O to USB communications interface

• Mean time between failure (MTBF): >1,000,000 hrs

• Sealed, over-moulded case. No serviceable parts.

7. Setup

Temperature
Operating: -25° to 50°C

Power requirement
Source: 12 Vdc from datalogger via SC12 cable,
or 5 Vdc through PC USB port
Load
Inactive: 200 µA
Active: 35 mA

Memory
Capacity: 2 GB
Media: Flash

Weight: 0.64 kg (0.14 lbs)

Dimensions: 105 x 43 x 21 mm (4.2 x 1.7 x 0.8 in)

A PC requires software drivers to support the SC115, and the datalogger
requires inclusion of specific code in its CRBasic program. In rare instances,
the SC115 may require a change to its default configuration through Campbell
Scientific’s Device Configuration Utility software v. 1.5 or higher
(DevConfig).

7.1 SC115 Settings (Optional)

The default SDC addressing in the SC115 is adequate for most applications.
For exceptional circumstances, the CS I/O SDC address can be altered using
the SC115 service in DevConfig v. 1.5 or higher (see Section 14.1, SDC
Addressing).

3

SC115 CS I/O 2G Flash Memory Drive with USB Interface

7.2 PC Preparation

The following procedures install required drivers to the PC. Install drivers
BEFORE connecting the SC115 to the PC.

1. Obtain software drivers from one of the following sources.

Source 1: Insert the CD supplied with a new SC115. The CD should auto
run and present a menu (if not, open AutoRun.exe). Click on Install
Drivers button.

Source 2: Drivers can be accessed through the SC115 service of Device
Configuration Utility software (DevConfig), which is available at

www.campbellsci.com

Source 3: Obtain the SC115_Drivers.exe file at www.campbellsci.com
and copy it to a PC drive. Open the file and follow the prompts.

2. Follow the on-screen prompts to copy driver files to the PC.

3. Install drivers for SC115 as outlined in Table 1, PC Driver Installation for

SC115 as Memory Device or Table 2, PC Driver Installation for SC115 as
Communications Interface. Procedures differ for different Windows®

operating systems and assume driver files have been copied to the PC.

.

,

TABLE 1. PC Driver Installation for SC115 as Memory Device

Windows® XP Windows® Vista Windows® 7

1. Insert the SC115

into a computer
USB port,

2. The Found New

Hardware Wizard
window will open.
Select No, not this
time, when asked
to connect to

Windows®

Update, then click
Next.

3. Select Install the

software
automatically,

then click Next.

4. If the

5. Click Finish to

Windows®

Security window
appears, select

Install this driver
software anyway

to continue.

close the found

New Hardware
Wizard window.

1. Insert the SC115

into a computer
USB port,

2. The Found New

Hardware window
will open. Click on

Locate and install
driver software.

3. If the Windows®

Security window
appears, select

Install this driver
software anyway.

1. Insert the SC115

into a computer
USB port,

2. Windows

typically
configures the
driver
automatically.

3. If the drivers are

not automatically
installed, do steps 4
through 6.

4. Go to Windows

Start Menu |
Control Panel |
Hardware and
Sounds | Device
Manager (under

the Devices and
Printers category).

5. Under Other

Devices, right click
on SC115.

6. Choose Update

Drivers.

®

7

4

SC115 CS I/O 2G Flash Memory Drive with USB Interface

TABLE 2. PC Driver Installation for SC115 as Communications Interface

Windows® XP Windows® Vista Windows® 7

1. Apply power to a

Campbell Scientific
datalogger, then
attach the SC115 to
the datalogger’s CS
I/O port.

2. Using the included

USB extension
cable, attach the
SC115 to an open
USB port on the
computer.

3. The Found New

Hardware Wizard
window will open.
Select No, not this
time, when asked
to connect to
Windows

®

Update,

then click Next.

4. Select Install the

software
automatically, then

click Next.

5. If the Windows

Security window
appears, select

Install this driver
software anyway.

6. Click Finish to

close the Found

New Hardware
Wizard window.

1. Apply power to a

Campbell Scientific
datalogger, then
attach the SC115 to
the datalogger’s CS
I/O port.

2. Using the included

USB extension
cable, attach the
SC115 to an open
USB port on the
computer.

3. The Found New

Hardware window
will open. Click on

Locate and install
driver software.

4. If the Windows

Security window

appears, select

Install this driver
software anyway.

®

1. Apply power to a

Campbell Scientific
datalogger, then
attach the SC115 to
the datalogger’s CS
I/O port.

2. Using the included

USB extension
cable, attach the
SC115 to an open
USB port on the
computer.

3. Windows

typically configures
the driver

®

automatically.

4. If the drivers are not

automatically
installed, do steps 5
through 7.

5. Go to Windows

Start Menu |
Control Panel |
Hardware and
Sounds | Device
Manager (under
Devices and
Printers category).

6. Under Other

Devices, right click

on the SC115.

7. Choose Update

Drivers.

®

7

7.3 Datalogger CRBasic Programming

The datalogger CRBasic program needs to include a TableFile() instruction to
store datalogger data on the SC115. The TableFile() instruction is entered in
the declaration of the data table after the DataInterval() instruction. The
parameters entered for the TableFile() instruction depend on the data storage
mode used (refer to Section 8, Data Storage Modes). Section 10, Datalogger
Programming discusses, in detail, datalogger programming, and provides
several datalogger programming examples.

5

SC115 CS I/O 2G Flash Memory Drive with USB Interface

8. Data Storage Modes

The datalogger CRBasic program determines the SC115 data storage mode
through the TableFile() instruction. The TableFile() instruction in the
datalogger CRBasic program determines what data the SC115 will receive
from the datalogger. Data collection modes and residential modes are
available.

8.1 Data Collection Modes

With these modes, data collection is automatically initiated by connecting the
SC115 to the datalogger. The SC115 only collects data already contained in
datalogger memory at the time of connection. Additional data will not be
collected until the SC115 is disconnected and then reconnected to the
datalogger.

Both standard and enhanced data-collection modes are available. With the
standard mode, the SC115 collects the newest data (data written to the
datalogger memory since the last connection). With the enhanced mode, the
SC115 collects all of the data stored in the datalogger’s memory every time the
SC115 is reconnected.

NOTE

To use the enhanced data collection mode, the datalogger must
have a newer operating system (OS 22 or higher).

8.1.1 Programming for the Data-Collection Modes

The standard mode is enabled in the TableFile() instruction by entering 0 for
both the NumRecs (Number of Records) parameter and the Interval parameter.
The enhanced mode is enabled by entering 0 for the NumRecs parameter and
entering -1 for the Interval parameter.

Below are TableFile() instructions that enable data collection modes. The first

TableFile() instruction enables the standard data collection mode. The second
TableFile() instruction enables the enhanced data collection mode. See

Section 10.5.1, Data Collection Mode Examples for more detailed program
code.

TableFile("USB:"+Status.SerialNumber+"_FileName",8,-1,0,0,Hr,0,0)

TableFile("USB:"+Status.SerialNumber+"_FileName",8,-1,0,-1,Hr,0,0)

8.1.2 Multiple Dataloggers

The data-collection modes allow one SC115 to be used with multiple
dataloggers. When using multiple dataloggers, specify a unique file name for
each instance of the TableFile() instruction (see Section 10.1.1, FileName).
This avoids overwriting data files from other dataloggers.

6

8.2 Resident Mode

SC115 CS I/O 2G Flash Memory Drive with USB Interface

NOTE

Resident modes increase the risk of data corruption. Review
Section 12.1, Preventing Data Corruption before employing a
resident mode.

In the resident modes, the SC115 remains attached to a single datalogger
allowing it to be used as resident external memory. The datalogger can be
programmed to bale data to the SC115 at regular intervals or at uniform bale
sizes.

When data retrieval is required, 1) a second SC115 is swapped with the first, or

2) the SC115 is removed, milked of data (perhaps by copying or moving data
to a laptop computer), and then reconnected to the datalogger.

NOTE

To avoid losing data when the SC115 is disconnected from the
datalogger, the datalogger must have sufficient storage memory
allocated in DataTable() / EndTable declarations in the form of

internal or CompactFlash

®

1

memory to cover the period the

SC115 is not present.

8.2.1 Programming for the Resident Modes

A resident mode that collects data at regular intervals is enabled in the
TableFile() instruction by entering zero or a positive value for the
NumRecs/TimeIntoInterval parameter and entering a non-zero, positive value
for the Interval parameter. To collect data at uniform bale sizes, enter a non­zero, positive value for the NumRecs parameter and enter zero for the Interval
parameter.

Below are TableFile() instruction examples that enable resident modes. The
first TableFile() instruction sets the datalogger to bale data to the SC115 at
midnight each day. The second TableFile() instruction sets the datalogger to
send bales of 24 records to the SC115. See Section 10.5.2, Resident Interval
Mode Example for more detailed program code.

TableFile("USB:FileName",8,-1,0,24,Hr,0,0) 'Interval trigger

TableFile("USB:FileName",8,-1,24,0,Hr,0,0) 'Number of records
trigger

9. Retrieving Data from SC115

Install PC software drivers BEFORE connecting the SC115. See Section 7.2,
PC Preparation.

To collect data from the SC115, plug it into a PC USB port. The SC115
becomes a memory drive on the PC, and data files can be copied, moved, or
deleted with the common file handling functions of Windows
SC115s can be connected to a PC simultaneously and data passed between
them. Connecting a second SC115 may require installing the device driver a
second time. When used as a communications interface, however, only one
SC115 should be connected to a PC.

Before disconnecting the SC115 from the PC, run the Safely Remove
Hardware utility in Windows.

®

. Multiple

7

SC115 CS I/O 2G Flash Memory Drive with USB Interface

10. Datalogger Programming

When used as a memory drive, the SC115 requires a TableFile() instruction in
the datalogger CRBasic program. TableFile() creates a file from data table
records, and writes the file to the SC115. The TableFile() instruction must be
within the DataTable() / EndTable declaration.

10.1 DataTable() and TableFile() Instructions

DataTable() and TableFile() instructions work together. The data table size
declared in DataTable() determines the size of the TableFile() buffer. For
instance, a programmer may attempt to conserve datalogger memory by setting
DataTable() Size to 0 with the thought that doing so will direct data to only be
written to the SC115 when it is attached for milking. However, such a
programming tactic will result in failure since, in setting the DataTable() size
to zero, the programmer also sets the TableFile() data buffer to zero.

At the opposing extreme, if the same memory-conscious programmer sets
DataTable() Size to auto-allocate (-1), there is a high probability that the
datalogger will allocate far more memory for TableFile() buffering than is
needed, which will consume memory that may be better used elsewhere.

CAUTION

Memory allocated by the DataTable() instruction acts as
the buffer for TableFile() data, so the DataTable() Size
parameter must be declared large enough to buffer the
TableFile() output between collection visits with the
SC115.

TableFile() syntax is reviewed below with comments specific to SC115
applications. For more detail, consult CRBasic Editor Help. TableFile() is
included in the DataTable() / EndTable declaration as shown in the
programming examples in Section 10.5, Example Programs.

TableFile(a,b,c,d,e,f,g,h)

a = “Drive:FileName.” Drive always = USB: for SC115. Set a

filename unique to each instance of TableFile() instruction. See
Section 10.1.1, FileName for required syntax.

b = Format. Most common format is code 8 (TOA5). See CRBasic

Help for details.

c = MaxFiles. -1 invokes auto allocation.
d = NumRec / Time Into Interval. Data collection modes: enter 0.

Resident modes: enter number of records (integer > 0) or enter
time into interval (integer ≥ 0). See following Table 3 and
Section 10.1.4, NumRecs/TimeIntoInterval Parameter for
explanation.

e = TFInterval. Data collection modes: enter 0 to collect newest data

or enter -1 to collect all of the datalogger’s data. Resident mode:
enter 0 if parameter d is set to number of records, otherwise enter
time interval (integer > 0). See following Table 3 and Section

10.1.5, Interval Parameter for detail.

f = TFUnits. Enter units for time interval. Ignored at compilation if

parameter e is 0 or -1.

g = OutStat. Optional. Set to 0 or see CRBasic Help.
h = LastFileName, Optional. Set to 0 or see CRBasic Help.

8

SC115 CS I/O 2G Flash Memory Drive with USB Interface

TABLE 3. Function of NumRec, TFInterval, and TFUnits Parameters

NumRec/
Time Into
Interval (d)

Entry

TFInterval (e)
Entry

TFUnits (f)
Entry

0 0 N/A

(compiler
ignores)

0 -1 N/A

(compiler
ignores)

Function

When the SC115 is connected
to the datalogger, the
datalogger automatically
sends to the SC115 only the
data collected after the SC115
was last connected. The
datalogger will not send
additional data if the SC115
remains connected to the
datalogger.

When the SC115 is connected
to the datalogger, the
datalogger automatically
sends to the SC115 all of the
data contained in the
datalogger’s memory. The
datalogger will not send
additional data if the SC115
remains connected to the
datalogger.

number of
data
records
(value > 0)

0 N/A

(compiler
ignores)

The datalogger sends the
specified number of data
records to the SC115 when
the data records become
available. For example, if the
NumRec parameter is set to 20
and TFInterval is set to 0, the
datalogger will write twenty
records to the SC115 when
twenty records become
available.

time into
interval
(value ≥ 0)

interval
(value > 0)

mSec, uSec,
Sec, Min, Hr,

or Day

The datalogger sends data to
the SC115 at the specified
interval. For example, when
the NumRec/Time Into
Interval parameter is set to 0,
the TFInterval parameter is
set to 60 and the TFUnit
parameter is set to Min, the
datalogger will write data to
the SC115 every 60 minutes.

The following sections explain each TableFile() parameter in detail.

9

SC115 CS I/O 2G Flash Memory Drive with USB Interface

10.1.1 FileName

The FileName parameter must be a string declared as Const, such as

Const FileName = "USB:FileName",

or as an expression that evaluates to a constant, such as

"USB:"+Variable+"FileName"

Quotation marks are required. The created file will have a suffix of X.dat,
where X is a number that increments each time a new file is written.

When using a single SC115 to collect data from several dataloggers, the
TableFile() FileName parameter must be unique for each data table being
collected. Otherwise, data may be overwritten on the SC115. Using a
TableFile() instruction with parameters as shown below creates a naming
scheme wherein the station name or serial number are part of the file name.
This allows the source of data to be easily identified during post-processing.

TableFile("USB:"+Status.SerialNumber+"Filename",8,-1,0,0,Min,0,0)

When a program is compiled with “USB:” in the file path, it searches the
attached SC115 for any file names in the series. If it finds any, it uses the
highest numbered file name, increments it by one, uses the result as the name
for a new file, and writes the new data to the new file.

CAUTION

10.1.2 Options

When multiple SC115s are used to retrieve data from multiple dataloggers, it is
often desirable to set the interval parameter to -1. If the interval parameter is
set to 0 instead of -1, the complete set of records from a single datalogger will
likely be spread across all SC115s used to retrieve data.

If data are retrieved from a datalogger using an SC115 that
already contains files whose names match those created
by the current datalogger’s TableFile(), the old files are
likely to be overwritten. Using unique filenames for each
datalogger, such as including the station name or serial
number, is the best practice. See example in Section

10.5.1.1, Standard Data Collection Mode. A rarely used
alternative is to recompile the datalogger program with the
second SC115 connected to retrieve its directory
information. This is done by powering down the
datalogger, connecting the SC115, and then powering up
the datalogger.

The Options parameter specifies the type of file to be saved and whether to
include the header information, timestamp, and/or record number. Options 0,
8, 16, and 20 correspond to Campbell Scientific formats for TOB1, TOA5,
CSIXML, and CSIJSON, respectively. Choosing an option not among these
four may make the file incompatible with Campbell Scientific software that
reads or writes data files. For example, Option 7 results in a TOB1 file that
cannot be read by CardConvert software or View Pro software. Refer to the
CRBasic Editor Help system for a complete listing of option codes.

10

10.1.3 MaxFiles

SC115 CS I/O 2G Flash Memory Drive with USB Interface

The MaxFiles parameter specifies the maximum number of files to retain on an
SC115. Table 4 reviews the options.

TABLE 4. Synopsis of MaxFiles Parameter Options

MaxFiles Entry Function

X Create Maximum of X files, ring memory (overwrite

oldest file with newest file when full).

0 The filename will remain fixed with no number

appended. The old file if it exists will be overwritten
at each output.

-1 No limit to number of files, ring memory (overwrite
oldest file with newest file when full)

-2 No limit to number of files, fill and stop memory
(datalogger stops writing to SC115 when SC115 is
full)

When MaxFiles is X, SC115 memory may fill before X number of files is
reached. If this occurs, the datalogger internally reduces X to the current
number of files and overwrites the oldest file with new data.

Refer to the CRBasic Help system for detailed information on this parameter.

10.1.4 NumRecs/TimeIntoInterval Parameter

Data Collection Modes

For Data Collection Modes, the NumRecs/TimeIntoInterval parameter is set to
zero, and the Interval parameter is set to either 0 or -1 (see Section 10.1.5,
Interval Parameter). With these modes, the datalogger begins writing to the
SC115 as soon as it is connected to the datalogger. All new records are written
to a single file. See previous Table 3 and Section 10.5.1, Data Collection
Mode Example.

Resident Modes

NOTE

Resident Mode increases the risk of data corruption. Review
Section 12.1, Preventing Data Corruption before employing a
resident mode.

For resident modes, the NumRecs/TimeIntoInterval parameter determines when
files are written to the SC115. The function of NumRecs/TimeIntoInterval is
linked to the Interval parameter. If Interval is set to 0, enter the number of
records to be included in each new file sent to the SC115. The program will
create a new file each time NumRecs is reached. If Interval is set to non-zero,
NumRecs/TimeIntoInterval becomes the time into Interval that the program
writes the next file. Previous Table 3 and CRBasic Editor Help provide further
explanation of the interplay between TimeIntoInterval and Interval.

11

SC115 CS I/O 2G Flash Memory Drive with USB Interface

10.1.5 Interval Parameter

Data Collection Modes

For data collection modes, the Interval parameter determines what data are
written to the SC115. Set this parameter to 0 to collect only data written to
datalogger memory since it was last connected. Set this parameter to -1 to
collect all of the data stored in the datalogger’s memory. See previous Table 3.

Resident Mode

NOTE

Resident Mode increases the risk of data corruption. Review
Section 12.1, Preventing Data Corruption before employing a
resident mode.

For Resident Mode, the Interval parameter is used to determine how frequently
data are written to the SC115. By setting this parameter to a non-zero number,
the datalogger writes a new file to the SC115 at the interval based on this
number and the Units parameter.

If Interval is set to 0, but NumRecs/TimeIntoInterval is set to a non-zero value,
the datalogger writes data to the SC115 whenever the number of new records
matches the NumRecs/TimeIntoInterval value.

10.1.6 Units Parameter

The Units parameter specifies the units used by the Interval parameter. The
compiler ignores this parameter if the interval parameter is set to 0 or -1.

10.1.7 OutStat Parameter

OutStat is inactive when set to 0.

When set to a variable declared as Public or Dim, OutStat (output status)
indicates whether or not a new data file was stored the last time TableFile()
executed. If a new file is written, -1 is stored in the variable the next time

CallTable() is executed. If a new file is not written, 0 is stored the next time
CallTable() is executed.

12

TableFile() has been designed to permit the datalogger to continue program
execution while data are baled, by a separate process, into the table file. The
up-side is that TableFile() does not slow program execution. The down-side is
that notification that the TableFile() task is complete is delayed. This situation
is manifest as follows.

If writing a new file takes longer than the CallTable() interval (the interval of
the Scan() / NextScan construct wherein the CallTable() instruction resides),
then the OutStat variable will not be updated. In other words, if the table file is
large, and the scan rate is short, OutStat may not be updated.

10.1.8 LastFileName Parameter

Set to 0 (no last file name) if desired. The LastFileName parameter is a
variable that contains the name of the last file written. LastFileName is
updated the next time CallTable() instruction is executed.

SC115 CS I/O 2G Flash Memory Drive with USB Interface

TableFile() has been designed to permit the datalogger to continue program
execution while data are baled by a separate process into the table file. The up­side is that TableFile() does not slow program execution. The down-side is
that notification is delayed that the TableFile() task is complete. This situation
is manifest as follows.

If writing a new file takes longer than the CallTable() interval (the interval of
the Scan() / NextScan construct wherein the CallTable() instruction resides),
then the LastFileName variable will not be updated. In other words, if the table
file is large, and the scan rate is short, LastFileName may not be updated.

10.2 CardFlush Instruction

If a program Scan() / NextScan Count parameter is non-zero, the latest data
may fail to write to the SC115 unless the CardFlush instruction is used. For
example, with a scan count of 600, a scan interval of 100 ms, and writing a file
with TableFile() after every 10 seconds (every 100 records), only 400–575
records may be written to the SC115 due to the program ending at the 600
scan prior to transferring all the records to the SC115. To transfer the
remaining data to the SC115, place the CardFlush instruction between the
NextScan and EndProg instructions. See Section 10.5.4, CardFlush Example.

th

10.3 CardOut Instruction

A datalogger that supports CompactFlash® (CF) can be programmed to
simultaneously store data to internal memory, a CF card, and an SC115. The
datalogger program needs to include a CardOut() instruction in the
DataTable() declaration. By including CardOut(), the datalogger can write
data to the SC115 that is present only on the CF card.. See Section 12.4.1,
Card and Collection Speed for more information on SC115 and CF card
interactions. See Section 10.5.5, CardOut Example.

10.4 Powerup.ini

The SC115 supports the use of a powerup.ini file, which allows the host
datalogger to be loaded with a specific program or operating system at
datalogger power-up. Consult the powerup.ini section in the datalogger
manual for more information.

10.5 Example Programs

10.5.1 Data Collection Mode Examples

10.5.1.1 Standard Data Collection Mode

'Plug – Retrieve Data Since Last Plug - Pull

'In this example, the SC115 is connected to the datalogger to retrieve the data
'written to the datalogger memory after the last connection. It only retrieves
'data that were already in datalogger memory when it was connected. To retrieve
'subsequent data, the SC115 must be disconnected then re-connected to the
'datalogger. Note that the file name incorporates the system Status.SerialNumber
‘variable, which inclusion helps avoid file overwrites.

Public PanelTempC, BattVolt

DataTable (Test,1,-1)
DataInterval (0,60,Min,0)
TableFile ("USB:"+Status.SerialNumber+"_Filename",8,-1,0,0,Min,0,0)

13

SC115 CS I/O 2G Flash Memory Drive with USB Interface

Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

BeginProg
Scan (10,Sec,3,0)
PanelTemp (PanelTempC,250)
Battery (BattVolt)
CallTable Test
NextScan
EndProg

10.5.1.2 Enhanced Data Collection Mode Example

'Plug – Retrieve All Data – Pull

'In this example, the SC115 is connected to the datalogger to retrieve all of
'the data stored in datalogger memory. It only retrieves data that were already
'stored in the datalogger memory when it was connected. To retrieve subsequent
'data, the SC115 must be disconnected and then reconnected to the datalogger.

Public PanelTempC, BattVolt

DataTable (Test,1,-1)
DataInterval (0,60,Min,0)
TableFile ("USB:"+Status.SerialNumber+"_Filename",8,-1,0,-1,Min,0,0)
Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

BeginProg
Scan (10,Sec,3,0)
PanelTemp (PanelTempC,250)
Battery (BattVolt)
CallTable Test
NextScan
EndProg

14

10.5.2 Resident Interval Mode Example

'Plug In and Leave – data baled from buffer to SC115 every 60 minutes

'In this example, the SC115 remains at the datalogger as resident memory.
'This program avoids data corruption by setting TableFile() Interval to 60
'In this case, data are written only once an hour to the SC115.

Public PanelTempC, BattVolt

DataTable (Test,1,-1)
DataInterval (0,1,Min,0)
TableFile ("USB:Test",8,-1,0,60,Min,0,0) 'SC115 resident mode with interval
Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

BeginProg
Scan (10,Sec,3,0)
PanelTemp (PanelTempC,250)
Battery (BattVolt)
CallTable Test
NextScan
EndProg

SC115 CS I/O 2G Flash Memory Drive with USB Interface

10.5.3 Resident Record Number Mode Examples

'Plug In and Leave – data baled from buffer to SC115 every 60 records

'In this example, the SC115 remains at the datalogger as resident memory.
'This program avoids data corruption by setting TableFile() NumRecs to 60
'In this case, data are written only once an hour to the SC115.

Public PanelTempC, BattVolt

DataTable (Test,1,-1)
DataInterval (0,1,Min,0)
TableFile ("USB:Test",8,-1,60,0,Min,0,0) 'SC115 resident mode with NumRec
Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

BeginProg
Scan (10,Sec,3,0)
PanelTemp (PanelTempC,250)
Battery (BattVolt)
CallTable Test
NextScan
EndProg

'Plug In and Leave – data baled when buffer is full,
'i.e. DataTable() Size = TableFile() NumRecs (memory efficient!)

'In this example, the SC115 remains at the datalogger as resident memory.
'This program avoids data corruption by setting DataTable() Size to equal
'TableFile() NumRecs. In this case, data are written only once every two hours
'to the SC115.

Public PanelTempC, BattVolt

DataTable (Test,1,120)
DataInterval (0,1,Min,0)
TableFile ("USB:Test",8,-1,120,0,Min,0,0) 'SC115 resident mode with NumRec
Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

BeginProg
Scan (10,Sec,3,0)
PanelTemp (PanelTempC,250)
Battery (BattVolt)
CallTable Test
NextScan
EndProg

15

SC115 CS I/O 2G Flash Memory Drive with USB Interface

10.5.4 CardFlush Example

'In this example, the SC115 remains at the datalogger as resident memory.
'The Scan count, usually left at 0, is set to 600 in this application.
'To ensure complete collection of data, CardFlush instruction is included.

Public PanelTempC, BattVolt

DataTable (Test,1,-1)
DataInterval (0,10,Sec,0)
TableFile ("USB:Test",8,-1,100,0,Hr,0,0) 'SC115 resident mode with NumRec
Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

BeginProg
' Scan stops at count 600 – Not enough time to transfer all data!
Scan (100,mSec,3,600)
PanelTemp (PanelTempC,250)
Battery (BattVolt)
CallTable Test
NextScan
CardFlush 'Included to ensure complete data transfer to SC115
EndProg

10.5.5 CardOut Example

'In this example, the SC115 and a CompactFlash® card are used as external memory.

Public PanelTempC, BattVolt

DataTable (Test,1,-1)
DataInterval (0,1,Min,0)
CardOut (0,-1)
TableFile ("USB:Test",8,-1,0,60,Min,0,0) 'SC115 resident mode with interval
Sample (1,PanelTempC,FP2)
Minimum (1,BattVolt,FP2,0,False)
EndTable

BeginProg
Scan (10,Sec,3,0)
PanelTemp (PanelTempC,250)
Battery (BattVolt)
CallTable Test
NextScan
EndProg

16

SC115 CS I/O 2G Flash Memory Drive with USB Interface

11. Serial Communications Interface Function

The SC115, when used as a serial interface, uses the Campbell Scientific SDC
protocol to facilitate communications between the datalogger and a PC. The
SDC address can be set to 7, 8, 10, or 11 (See Section 7.1, SC115 Settings).

Consider the following points when using the SC115 as a communications
interface:

• Use the provided extension cables to establish the physical connections

between datalogger, SC115, and PC BEFORE opening LoggerNet.

• When selecting a port in the LoggerNet Network Map for USB to CS I/O

communication, the COM port SC115 (COM#) must be selected. SC115
MSD (COM#) may also appear as a choice, but must not be selected as it
does not support the communications interface mode.

• Always click Disconnect within the datalogger support software Connect

window prior to breaking the physical connection between the PC, SC115
and datalogger. If this rule is not observed, and communication problems
develop, follow the procedure in Section 13.1, Breaking the Physical
Comms Link.

• Do not connect two SC115s to a PC at the same time if both are attached

to powered dataloggers. This can cause confusion of virtual com ports on
the PC (as memory devices, two SC115s may be attached to a PC at the
same time).

12. Troubleshooting Memory Drive

12.1 Preventing Data Corruption

To avoid corruption of SC115 memory, never remove the SC115 from the
datalogger during data transfer. The flashing LED indicates when data are
being written to the SC115. Should the SC115 be removed while the LED is
flashing, the most likely result is that the current data file will be corrupted. In
addition, a FAT sector or the directory link sector may become corrupted. This
condition requires that the SC115 memory be reformatted, which will result in
the loss of all data.

When either the NumRecs/TimeIntoInterval or Interval parameters are set to a
non-zero positive value (resident modes), there is a risk that the datalogger will
begin writing data to the SC115 at the exact moment it is being removed from
the datalogger, resulting in data corruption. To prevent this, set these
parameters to values that allow the time between writing data to be easily
discerned (such as an interval of 10 seconds) by watching the LED. The user
then times the removal of the SC115 to occur when the datalogger is not
writing data. See Section 10.5.2, Resident Interval Mode Example.

Another method is to set the NumRecs parameter in TableFile() to match the
Size parameter in the associated DataTable() instruction. Depending on the
rate at which records are written, this can cause data to be written to the SC115
at long intervals, greatly reducing the chance of removing the SC115 from the
datalogger while transferring data. See Section 10.5.3, Resident Record
Number Mode Examples (second example).

If SC115 data becomes corrupted, first attempt to retrieve all files from the
SC115. Reformat the SC115 per Section 14.2, Formatting Memory.

17

SC115 CS I/O 2G Flash Memory Drive with USB Interface

12.2 Skipped Scans

To avoid skipped scans, ensure that the scan interval in the datalogger program
is long enough to include writing to the SC115. For example, if the program
has a single TableFile() instruction, add at least 100 ms to the scan rate to
accommodate each added TableFile() instruction.

Compile datalogger programs in pipeline mode when possible. Datalogger
programs compiled in sequential mode require a longer scan interval than
programs compiled in pipeline mode to avoid skipped scans. In pipeline mode,
the Scan() / NextScan instruction BufferOption parameter can be increased to
prevent skipped scans. In sequential mode, the TableFile() instruction must
finish before continuing to the next instruction, resulting in skipped scans
unless the scan interval is long enough to handle all communication,
measurement processing, and TableFile() tasks. Sequential mode ignores any
scan buffers that may be assigned. Programs may run as much as three times
faster in pipeline mode than in sequential mode.

12.3 SC115 with Large Data Compliment

An SC115 with a large compliment of data (either a large number of files, or a
few very large files) may respond slower than an SC115 with less data.
Compiling datalogger programs from a full SC115 may take longer than
normal.

Opening the SC115 directory in support software File Control also takes
longer if there are a large number of files within the SC115 directory. File
Control can access approximately twenty files per second when opening the
directory.

12.4 Data Collection Speed

Many factors affect collection speed in plug and pull data collection mode. As
a rough estimate, collection speed is typically 3 to 4 kB of SC115 file size per
second (TFOption = 8, SDC7 set to -115200 [autobaud], no card storage
module present). Following are descriptions of two factors that contribute
significantly to the slowing of collection speed.

12.4.1 CF Card and Collection Speed

Following is a discussion of SC115 performance expectations when it is used
in tandem (plug and pull data collection mode) with a resident CF card on a
datalogger.

Background — When an SC115 is configured for data collection mode (plug
and pull), and it is plugged into a datalogger with a resident CompactFlash
(CF) card, and the running program is using the CardOut() instruction, all data
present since the last collection will be automatically transferred from the data
table to the SC115 file.

How it works — When CardOut is used in a DataTable() / EndTable
declaration, the file created on the CF card becomes an extension of the table
memory. The internal memory is used as a buffer to transfer data to the CF
card. When there are enough data to warrant a write to the CF card, the data are
flushed to the card. This results in duplicate data, up to the internal table size,
that will exist on the internal memory and the CF card files. Any time the table

®

18

SC115 CS I/O 2G Flash Memory Drive with USB Interface

data are retrieved via LoggerNet data collection, or by using the TableFile()
instruction, the internal SRAM is searched first, then the card. So, when
operating the SC115 in plug and pull mode, SRAM data are transferred first,
then the CF card is searched.

Effect —The rate of transfer is slowed, not because of the search of the card,
but because of the serial communications and (even slower) if an ASCII
output file is selected. This is compounded by large data files that can occur
when the CardOut instruction is used. Searching the CF card adds some
overhead, but the vast majority of time is spent converting to ASCII and
transferring across a slow serial link.

Take home — CF card to SC115 transfer of data is about 30 to 50% slower
than datalogger CPU to SC115 transfer of data. For example, in testing with a
CR1000 datalogger with a 2 GB card attached, transfer of a 3.9 MB file (so no
data were stored to the card) took aproximately16 minutes (about 250 kB per
minute). However, the rate of transfer slowed to about 190 kB per minute
when datalogger CPU memory was allowed to ring (fill and overwrite oldest
data) many times, resulting in a large amount of data on the card that was no
longer present on the CPU. In this example, it took 116 minutes to transfer a
22 MB data file from the CF card to the SC115. In the case of very large data
files stored to the CF card, it makes more sense to swap CF cards (see the
CFM100 CompactFlash Module user manual, available at

www.campbellsci.com

milking the data with the SC115 in plug and pull mode.

, for details), or use a resident SC115, rather than

12.4.2 Data Type Collection Speed

Data type declared in the TableFile() TFOption parameter can affect SC115
collection speed. Data are buffered in the datalogger as binary. While data are
collected, the datalogger converts the binary to the declared data type. TOB1
options are binary and require very little processor overhead to convert from
the binary buffer. TOA5, CSIXML, and JSON are ASCII options and are far
slower since they consume significant processor overhead to convert to ASCII
from the binary buffer. CSIXML is especially slow. The effects on collection
time will be particularly noticeable if the datalogger is running a long or
complex program. In short, if large files from numerous dataloggers need
collection, using the TOB1 format may save considerable time. Consult the
LoggerNet Instruction Manual for options available to convert TOB1 data files
on the PC to easier-to-read formats.

12.5 Slow PC Boot-up

Leaving an SC115 attached to a PC while it is booting up may cause a delay of
several minutes to the boot-up process on some computers. The PC will
continue to boot normally if the SC115 is removed. The SC115 can then be
inserted and used as normal.

12.6 Write Failure

A write failure (after retries) is interpreted to mean the memory is full. When a
write failure occurs, MaxFiles parameter in the TableFile() instruction is
adjusted to its current number. In addition, the datalogger enters ring mode,
overwriting the oldest file on the SC115 with the new data (as if the MaxFile
parameter was set to -1).

The timeout period between a failed write command and a retry is 8 seconds.

19

SC115 CS I/O 2G Flash Memory Drive with USB Interface

13. Troubleshooting Communications Interface

13.1 Breaking the Physical Comms Link

To avoid a communications error, always click on Disconnect prior to
physically breaking the SC115 interface link.

When the SC115 interface link between the PC and the datalogger is physically
broken before Disconnect is clicked in the support software, the software
requires about one minute to process the broken link. If the link is reconnected
before the break is processed, a communications error may occur. If an error
occurs, use the following procedure to re-establish communications.

1. Click on the support software Cancel button to stop the connection attempt.

2. Disconnect the SC115 from the PC for at least one minute.

3. After one minute, reconnect the SC115 to the PC and datalogger.

4. Close the support software, then reopen it, then click on Connect.

14. Technical Reference

14.1 SDC Addressing

SDC addressing suitable for most applications is set at the factory.

The SC115 responds to two SDC addresses. SDC address 0 is used when data
files are transferred from the datalogger to the SC115. This setting cannot be
changed.

When plugged into a USB port, addresses SDC7, SDC8, SDC10, and SDC11
are available to support Communication Interface Mode on the CS I/O port.
This setting defaults to SDC7, but can be changed using Device Configuration
Utility software (DevConfig).

14.2 Formatting Memory

The SC115 is formatted at the factory and is ready to use out of the box.
Should the SC115 require formatting, such as if the memory becomes
corrupted, it can be formatted through datalogger File Control (PC400,

NOTE

LoggerNet, RTDAQ software), datalogger keypad (File | Format | USB), or
Windows
formatting as FAT or FAT32, always choose FAT32.

Formatting will erase all data files on the SC115.

®

Explorer (right click | Format). When given an option between

20

14.3 Operating System

The SC115 is configured at the factory with an operating system. Unless
notified by Campbell Scientific, the operating system does not need to be
reloaded. Downloading a new OS to the SC115 does not affect files in
memory.

15. Glossary

SC115 CS I/O 2G Flash Memory Drive with USB Interface

DevConfig – Device Configuration Utility. Campbell Scientific PC software
used for configuring dataloggers and peripherals.

LED – Light Emitting Diode

LoggerNet – Campbell Scientific top-level datalogger support software.

PC400 – Campbell Scientific mid-level datalogger support software.

RTDAQ – Campbell Scientific datalogger support software for industrial
applications.

SDC – Synchronous Devices Communication. A proprietary communications
protocol between Campbell Scientific dataloggers and some peripherals.

21

SC115 CS I/O 2G Flash Memory Drive with USB Interface

22

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Logan, Utah 84321

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PO Box 2450

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AUSTRALIA

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Edmonton, Alberta T5M 1W7

CANADA

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Please visit www.campbellsci.com to obtain contact information for your local US or International representative.