YOKOGAWA Daqstation DX2000 User Manual

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IM 04L42B01-01E
SpecialDataHandling
This section explains the handling of special data in TLOG computation, CLOG
computation, and reports.
• PowerFailureOperation(TLOGandReports)
If a power failure occurs when the report function is enabled or in the middle of the
TLOG computation, the report operation and TLOG computation resume when the
DX recovers from the power failure. The operation varies depending on whether the
DX recovers from the power failure before or after the time to create a report or TLOG
data.
TimeofRecovery Operation
After the time to create the data The report or TLOG data is created immediately after the
DX recovers. The measured data up to the time of the
power failure is used. At the time the next report or TLOG
data is created, the data after the recovery is used.
Before the time to create the data After the DX recovers, report or TLOG data is created at
the normal time to create the data. The measured data
excluding the power failure period is used.
• ErrorDataHandling(TLOG,CLOG,andReports)
If an error occurs in the channel data, the error data is discarded, and the computation
continues. If all the data are in error, an error results.
The following types of data are considered error data.
• ChannelssettoskiporOff.
• Themeasuredresultonameasurementchannelsiserror(A/Dconverterfailure,
etc.).
• Thecomputedresultonacomputationchanneliserror.
• Theinputofthemeasurementchannelisinaburnoutcondition.
• TheexternalinputchannelisOfforthereisnodata(communicationfailure,etc.)
• HandlingofOverflowData*
* Refers to over range on a measurement channel, computation overflow on a computation
channel, and over range of an external input channel.
 ForTLOG,CLOG,andReports
When the channel data is overflow data, the DX handles the data as follows:
ComputationType Description
Average value or sum
value
Set the handling to ERROR, SKIP, or LIMIT.
ERROR: Considers the data to be a computation error.
SKIP: Discards the overflow data and continues the computation.
LIMIT: Replaces the data with the limit value and continues the
computation.
The limit value is the span upper or lower limit or the scale
upper or lower limit of the channel.
Maximum, minimum,
Maximum – minimum
Set the handling to OVER or SKIP.
OVER: Computes by using the overflow data.
SKIP: Discards the overflow data and continues the computation.
 ForMultiplicationandRelationComputationEQandNE
ComputationType Computation ComputedResult
Multiplication 0*(+Over) 0
0*(–Over) 0
(+Over)*0 0
(–Over)*0 0
.EQ. (+Over).EQ.(+Over) 1
(–Over).EQ.(–Over) 1
.NE. (+Over).NE.(+Over) 0
(–Over).NE.(–Over) 0
1.8ComputationandReportFunction(/M1and/PM1Options)

YOKOGAWA Daqstation DX2000 Specifications

General

Category	Recording Equipment
Operating Temperature	0 to 50 °C (32 to 122 °F)
Model	DX2000
Type	Data Acquisition Recorder
Input Types	Thermocouple, RTD
Sampling Rate	Up to 100 ms per channel
Recording Interval	100 ms to 60 min
Display	Color LCD
Data Storage	Internal memory
Communication Interfaces	Ethernet, USB
Power Supply	100-240 VAC, 50/60 Hz

Summary

Chapter 1 Overview of Functions

1.1 Input Section

Describes input types, measurement channels, scan intervals, and A/D converter integration.

1.2 Alarms

Explains alarm types, hysteresis, delay, rate-of-change, and difference alarms.

1.3 Display

Details common display items, screen configuration, group display, and alarm indication.

1.4 Data Storage Function

Explains types of data the DX can record and how to store them.

1.6 Event Action and Remote Control Functions (/R1 and /PM1 Options)

Explains how specified actions are carried out when events occur.

1.7 Security Function

Details the DX security functions, including key lock and login.

1.8 Computation and Report Function (/M1 and /PM1 Options)

Explains defining equations in computation channels and creating reports.

Chapter 3 Measurement Channels and Alarms

3.1 Setting the Scan Interval and the Integration Time of the A/D Converter

Sets scan interval and A/D converter integration time.

3.2 Setting the Burnout Detection and the Reference Junction Compensation of the Thermocouple Input

3.3 Setting the Input Range

Sets the input range for each channel and defines input types.

3.5 Setting the Auxiliary Alarm Function

Configures alarm display and output relay operations.

3.7 Setting Alarms on Channels

Configures alarm types, values, and delay times for channels.

3.9 Performing Calibration Correction (/CC1 Option)

Corrects input values using segments for improved accuracy.

3.10 Counting Pulses (/PM1 Option)

3.12 Using the Alarm Annunciator Function (Release number 3 or later)

Chapter 4 Switching Operation Screens

4.2 Displaying the Measured Data as Waveforms, Values, or Bar Graphs

Details using trend, digital, and bar graph displays.

4.3 Displaying Past Measured Data (Historical Trend Display)

Explains methods to display past measured data.

4.4 Display the Statuses of All Channels on One Screen (Overview Display)

Chapter 5 Operations for Changing the Displayed Contents

Chapter 6 Saving and Loading Data

6.1 Setting the Recording Conditions of the Measured Data

Sets methods for recording measured data.

6.2 Setting the Method for Saving the Data

Sets the method for recording measured data to the storage medium.

6.3 Using the Batch Function

6.4 Starting/Stopping the Recording and Saving the Measured Data, Saving the Measured Data through Key Operation

Starts/stops recording and saves data to external media via key operation.

6.6 Saving the Screen Image Data (Snapshot)

6.7 Managing the Files on the Storage Medium

Displays files, checks free space, deletes files, and formats media.

6.8 Loading and Displaying the Measured Data in the Storage Medium

Loads display or event data files from storage and displays waveforms.

6.9 Saving/Loading the Setup Data

Saves setup data to external media or loads from it.

6.10 Loading and Saving Report Templates (/M1 and /PM1 options; release numbers 4 and later)

Chapter 7 Customizing Actions Using the Event Action and Remote Control Functions (/R1 and /PM1 Options)

7.1 Setting the Event Action Function (Including the remote control function of the /R1 and /PM1 options and the USER key)

Sets up actions to be performed when specific events occur.

Chapter 8 Using the Security Function

8.1 Disabling the Key Operation (Key Lock Function)

Disables key operations by setting a password.

8.2 Enabling Only Registered Users to Operate the DX (Login Function)

Restricts DX operation to registered users.

8.3 Logging in and Logging Out

Chapter 9 Computation and Report Functions (/M1 and /PM1 Options)

9.1 Setting the Expression, Measurement Range, Alarm, Tag, and Data Storage on Computation Channels

Configures computation channel expressions, ranges, alarms, tags, and data storage.

9.2 Writing Expressions

Explains the meaning and syntax for writing expressions.

9.4 Starting/Stopping Computation, Resetting Computation, and Releasing Computation Data Dropout Display

Manages computation processes, including starting, stopping, and resetting.

9.5 Creating Reports

Sets up how hourly, daily, weekly, and monthly reports are created.

9.6 Creating a Report Template (Release numbers 4 and later)

Chapter 10 Using External Input Channels (/MC1 Option)

10.1 Setting External Input Channels

Configures external input channels using Modbus client or master functions.

Chapter 11 Troubleshooting

11.1 A List of Messages

Provides a list of error codes, messages, and their explanations/countermeasures.

11.2 Troubleshooting

Offers troubleshooting steps for common operational issues.

Chapter 12 Calibration

12.2 Calibrating the DX

Recommends annual calibration for measurement accuracy.

Chapter 13 Specifications

13.1 Signal Input and Alarm

Lists specifications for signal input types and alarm functions.

13.2 Display Function

13.3 Data Saving Function

Explains specifications for saving various data types.

13.5 Options