3Com DIN Digital Indicator 59039-2 User manual

18-DIN DIGITAL INDICATOR
PRODUCT MANUAL
59039-2

CAUTION: REFER TO MANUAL
THE INTERNATIONAL HAZARD SYMBOL IS INSCRIBED ADJACENT TO
THE REAR CONNECTION TERMINALS. IT IS IMPORTANT TO READ THE
MANUAL BEFORE INSTALLING OR COMMISSIONING THE UNIT.
PREFACE
This manual comprises two volumes:
Volume I:This supports normal operation of the
1
8
-DIN
Digital Indicator. In normal operation, all actions
taken by the user are to be in front of the panel.
Volume II: This supports the installation, commissioning and
configuring of the 1
8
-DIN Digital Indicator. It is
intended for use only by personnel who are trained,
equipped and authorised to carry out these functions.

SM067-V1November, 2000(i)
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-DIN Digital Indicator
Product Manual - Volume I
18-DIN DIGITAL INDICATOR
PRODUCT MANUAL
VOLUME I
OPERATING INSTRUCTIONS
In normal operation, the operator must not remove the
Indicator from its housing or have unrestricted access to the
rear terminals, as this would provide potential contact with
hazardous live parts.
Installation and configuration must be undertaken by
technically competent servicing personnel. This is covered in
Volume II of this manual.

Contents
1INTRODUCTION1-1
2OPERATOR MODE2-1
3SET UP MODE3-1
4RS485 SERIAL COMMUNICATIONS4-1
Appendices
AAlphabetical IndexA-1
(ii)November, 2000SM067-V1
1
8
-DIN Digital Indicator59039
Product Manual - Volume I

SECTION 1
INTRODUCTION
The
1
8
-DIN Digital Indicator is an easy-to-operate microprocessor-based instrument,
incorporating the latest in surface-mount and CMOS technology. The standard features
include:
*Large four-digit LED display (orderable as red or green).
*Display for units indication
*Universalsensorinput-thermocouple,three-wireRTDorDClinear
(mA, mV or V)
*Input range selected from the front panel.
*Alarm 1 latching or non-latching (user-selectable) relay output
*Alarm hysteresis
*Maximum Hold, Minimum Hold and Time Elapsed features.
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*90 - 264V AC power supply.
*Designedto complywith EN50081Part 2(Emission) andEN50082
(Immunity) EMC specifications.
*Front panel sealing to IP65 (NEMA 4) standard.
*Programmable digital filter.
*Process Variable offset facility
*Alarm type selected from front panel.
*Sensor Break indication.
and the many optional features include:
*Alarm 2 and Alarm 3 relay outputs
*Remote reset of latched alarm
*Re-transmitted Process Variable output
*Transmitter power supply
*ASCII and MODBUS communications protocols
*RS485 serial communications.
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SECTION 2
OPERATOR MODE
2.1INTRODUCTION
The Operator Mode is the normal mode of the Indicator, once it has been set up and
configured as required. The front panel displays, indicators and keys are shown in
Figure 2-1.
2.2 FOUR-DIGIT DISPLAY
In Operator Mode, this normally displays the process variable value. Using the Scroll
key, the operator may view, in a sequence according to the Operator Mode Display
Strategy parameter in Set Up Mode (see NOTES ON TABLE 3-1):
(i)Currentmaximumvalueattainedbyprocessvariable(sincethemaximum
value was last reset)- MAXindicator ON when this is displayed. Also saves
the Sensor Break (see Subsection 2.6) and Over-Range (see Subsection
2.5) conditions.
(ii) Current minimum value attained by process variable (since the minimum
value was last reset) - MINindicator ON when this is displayed. Also saves
the Sensor Break (see Subsection 2.6) and Under-Range (see Subsection
2.5) conditions.
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Figure 2-1Front Panel Controls, Displays and Indicators

(iii) Time elapsed in the Alarm 1 active condition (units display shows ).
The display is in the format mm.ss [mm = minutes, ss = seconds] or mmm.s
[mmm=minutes,s=seconds(tens)].Ifelapsedtimeisgreaterthan999min-
utes 59 seconds, display will show:
NOTE: This does not include time when Alarm 1 is latched but alarm condi-
tion is cleared
(iv)Alarm1value (unitsdisplayshows or,ifonlyAlarm1present, ).
(v) Alarm 2 value, if fitted and configured (units display shows ).
(vi) Alarm 3 value, if fitted and configured (units display shows ).
(iv) Process variable value.
Further depressions of the Scroll key will repeat this display sequence.
2.3ALARM STATUS INDICATORS
The Alarm Status indicators show the current state of the alarm(s):
AL1 - Flashes when Alarm 1 is active (with latching alarm, ON when
Alarm 1 is latched but alarm condition has cleared)
AL2 - Flashes when Alarm 2 is active
AL3 - Flashes when Alarm 3 is active
For descriptions of the operation of the various types of alarm available, see Section 3.
2.4RESETTING THE MAXIMUM VALUE/MINIMUM VALUE OR TIME ELAPSED
VALUE
To reset the maximum value, minimum value (to the process variable value at the
instant of resetting) or time elapsed value (to zero):
1. Select the display of the maximum value, minimum value or time
elapsed value (as appropriate - see above).
2. Depress the Raise key or Lower key for three seconds.
The resetting of the value is indicated by the four-digit display showing:
for two seconds before reverting to the maximum value or minimum value display.
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2.5OVER-RANGE/UNDER-RANGE DISPLAYS
If the process variable attains a value higher than the input scale maximum limit
(over-range) or lower than the input scale minimum limit (under-range), the upper
display will show:
for the over-range condition and:
for the under-range condition.
2.6SENSOR BREAK INDICATION
If a break is detected in the sensor circuit, the four-digit display will show:
The reaction of the alarms to a detected sensor break is dependent upon the input type.
2.7 COLD JUNCTION COMPENSATION DISABLED
If a thermocouple input is fitted, the Cold Junction Compensation should
be enabled. If it is disabled, whenever the process variable is displayed,
the unit display will be as shown on the right.
2.8 RESETTING THE LATCHED ALARM
If Output 1 is configured to be a latched alarm output, once it becomes active it will
remain active (even if the alarm condition itself is cleared) until reset either from the
front panel or via the Remote Reset hardware option. To reset the latched alarm from
the front panel:
1. Ensure that the normal Operating Mode display (i.e. process variable)
is shown.
2. Press either the Raise key or the Lower key for at least three seconds.
The four-digit display will then show:
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for two seconds, indicating that the latched alarm has been reset. The latched Alarm 1
can be reset only if the original alarm condition has been cleared; this reset has no
effect whilst the alarm condition prevails.
2.9VIEWING THE HARDWARE DEFINITION CODE
The operator may view the current Hardware Definition Code setting in the four-digit
display by simultaneously depressing the Lower and Scroll keys. A return may be made
to the normal Operator Mode display by simultaneously depressing the Lower and
Scroll keys.
NOTE: An automatic return is made to the normal Operator Mode
display after 30 seconds.
To view the Hardware Option setting, press the Scroll key whilst the Hardware
Definition Code is displayed. To return to the Hardware Definition Code display,
depress the Lower and Scroll keys simultaneously.
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