Masibus CDU-LCD User manual

User’s Manual
CLEAN ROOM DISPLAY UNIT
C
CD DU U- -L LC CD D
Masibus Automation & Instrumentation Pvt. Ltd.
B/30, GIDC Electronics Estate,
Sector-25, Gandhinagar-382044, Gujarat, India
[phone] [phone]
Email: [e-mail]
Web: www.masibus.com

Model: CDU-LCD
Doc. Ref. no.:- mMP/om/601
Issue no.00.06
User’s Manual Page 2 of 32
Contents
1. INTRODUCTION..............................................................................................4
Foreword..............................................................................................................4
Notice...................................................................................................................4
Trademarks..........................................................................................................4
Product Overview.................................................................................................4
Safety Precautions...............................................................................................5
Accessory.............................................................................................................5
2. SPECIFICATIONS...........................................................................................6
Input.....................................................................................................................6
Display .................................................................................................................6
Data Logging........................................................................................................6
Features...............................................................................................................6
3. PHYSICAL SPECIFICATIONS & MOUNTING DETAILS................................7
4. TERMINAL CONNECTIONS...........................................................................9
4.1 How to connect wires?................................................................................9
5. Start UP and Basic Operation.....................................................................10
5.1 Power ON..................................................................................................10
5.2 Use Interface.............................................................................................10
6. Menu Layout.................................................................................................13
6.1 Run Page ..................................................................................................13
6.2 Temperature Page ....................................................................................13
6.3 Humidity Page...........................................................................................14
6.4 Differential Pressure Page.........................................................................15
6.5 Time Page.................................................................................................16
6.6 INFO Page ................................................................................................17
7. CALIBRATION PROCEDURE.......................................................................19
7.1 Procedure for calibration zero and span....................................................19
8. COMMUNICATION PROTOCOL–MODBUS RTU .......................................21
8.1 Introduction................................................................................................21
8.2 Function Code for Modbus........................................................................21
8.3 Temperature..............................................................................................21

Model: CDU-LCD
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8.4 Humidity ....................................................................................................22
8.5 Differential Pressure..................................................................................22
8.6 OUT...........................................................................................................23
8.7 CAL...........................................................................................................25
8.8 Info............................................................................................................26
8.9 Exceptional Response...............................................................................26
9. COMMUNICATION PROTOCOL-DNP 3.......................................................26
9.1 Introduction................................................................................................26
9.2 Analog Input..............................................................................................26
9.3 Analog Output ...........................................................................................27
10. APPENDIX.....................................................................................................28
10.1 Relative Humidity ...................................................................................28
10.2 Troubleshooting......................................................................................28
10.3 Buzzer & LED Status with respect to AHU Status..................................29
11. FAQ ...............................................................................................................29
1. When CDU will Display “OVER” Message?...................................................29
2. Why time synchronization is required?..........................................................29
3. How to know that connection is break between CDU and Sensor?...............29
4. What will happen after connection is established from connection lost between
SCADA and CDU?.............................................................................................29
5. What will happen with the data when the connection break between SCADA
and CDU?...........................................................................................................29
6. What is band?................................................................................................29
7. How to know that the memory is full in CDU?................................................29
8. How to analyse data on wire shark?..............................................................30
9. What will happen when the communication is lost and it gets healthy after few
hours or Days.?..................................................................................................31

Model: CDU-LCD
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Issue no.00.06
User’s Manual Page 4 of 32
1. INTRODUCTION
Foreword
Thank you for purchasing Clean Room Display Unit CDU-LCD.
This manual describes the basic functions and operation methods. Please read
through this user’s manual carefully before using the product.
Notice
The contents of this manual are subject to change without notice as a result of
continuous improvements to the instrument’s performance and functions.
Every effort has been made to ensure accuracy in the preparation of this manual.
Should any errors or omissions come to your attention, however, please inform
MASIBUS Sales office or sales representative. Under no circumstances may the
contents of this manual, in part or in whole, be transcribed or copied without our
permission.
Trademarks
Our product names or brand names mentioned in this manual are the trademarks or
registered trademarks of Masibus Automation and Instrumentation (P) Ltd. (herein
after referred to as MASIBUS).
Adobe, Acrobat, and Postscript are either registered trademarks or trademarks of
Adobe Systems Incorporated. All other product names mentioned in this user's
manual are trademarks or registered trademarks of their respective companies.
Checking the Contents of the Package
Unpack the box and check the contents before using the product. If the product is
different from which you have ordered, if any parts or accessories are missing, or if
the product appears to be damaged, contact your sales representative.
Product Overview
The masibus Clean Room Display Unit (CDU-LCD) can measure Differential
Pressure using inbuilt sensor and Temperature and Humidity through Wired Remote
Sensor.
3.5” Liquid Crystal Display (LCD) used for displaying Differential Pressure,
Temperature and Humidity. The CDU has inbuilt and external buzzer for audible
process value violation and one digital input for door status. CDU-LCD also has Real
Time Clock on display, PLC Communication DNP 3 protocol for interfacing. This
instrument’s design enables you for measuring of air relative humidity, temperature
and differential Pressure in Pharmaceutical industry, HVAC (heating, Ventilation, Air
conditioning, Cooling).
CDU-LCD comes with 3.5” LCD display for process value reading. Lab view based
utility software for configuration and calibration. CDU-LCD is factory calibrated to
specific ranges.

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Safety Precautions
The product and the instruction manual describe important information to prevent
possible harm to users and damage to the property and to use the product safely.
Understand the following description (signs and symbols), read the text and
Observe Descriptions.
DESCRIPTION OF SIGN
Accessory
The product is provided with the following accessory (see the Table 1 below).
Table 1
No
Item name
Part number
Qty
Remarks
1
Wired RH+T Sensor
CBL-CDU-TRH-10
1

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2. SPECIFICATIONS
Input
Number of channel
DP( Inbuilt Sensors) & RH,T (Wired Remote Sensor)
Measurement Range
±125 Pascal ,0.0 to 60.0 oC, 0 –100% RH
Accuracy
DP: ± 1 % FS ± 1 count
Temp.: ± 0.2 oC Typical, ±0.4 oC Maximum,
%RH : ± 2%RH Typical, ± 4%RH Maximum
Resolution
0.1 oC for Temperature , 1 Pascal for Differential
Pressure ,1% for Humidity
Response time
2 Sec
Display
Display
Color Graphical 49.96 mm x 74.44 mm, 320x480
pixels, Backlight Touch LCD
Output
Buzzer
Inbuilt and external Buzzer provided to beep in set values
violated condition
RTC
Real time clock with battery backup
Communication O/P
Interface
RS485 (2 Wire)
Protocol
DNP3
Baud Rate
9600,19200,38400 bps
Digital I/P
No of DI
1
Input Type
Non-Voltage Contact
Rating
24VDC at 5mA
Purpose
Door status
Data Logging
Memory
64Mbits
Record Type
Date/Time/Year/Temperature/Humidity/Differential
Pressure
Total Records
Up to 400000
Power supply
Standard
85-265VAC/ 100-300VDC
Optional
18-36VDC
Power Consumption
<3VA
Environmental Condition
Humidity
20% to 95% RH (Non-Condensing)
Ambient temperature
0 to 55°C
Storage Temperature
0 to 80°C
Physical
Enclosure Back Part
120 x 125 x 45 (W x H x D) in mm
Stainless Steel Front Plate
195 x 195(W x H ) in mm
Conceal Box
174 x 163 x 26(W x H x D) in mm
Enclosure material
SS front with MS Powder Coated Body
Enclosure Mounting
Brick Wall Mount
Enclosure Protection
IP 20
Table 2
Features
Elegant Appearance, easy to operate and compact in size
Easy to use 3.5” Touch LCD.

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Hi/Lo Alarms with symbol for all three channel.
Remote programmable from master device.
RS-485 communication available.
Inbuilt and external buzzer to audible process value violation.
Lab view based utility software for configuration and calibration.
User selectable set limits for process value violation.
Incorporates built-in Differential Pressure sensor.
3. PHYSICAL SPECIFICATIONS & MOUNTING DETAILS
Enclosure Protection
IP 20
IP 65
Enclosure Back Part
W mm x H mm x D mm
125x 120 x 45
156 x 116 x 48
Stainless Steel Front Plate :
W mm x H mm
195 x 195
225 x 225
Conceal Box :
W mm x H mm x D mm
174 x 163 x 26
200 x 190 x 46
Enclosure Material
M.S. Powder Coated Body with Stainless Steel
Front Flush
Weight Approx.
<1kg.
Enclosure Mounting
Brick wall mounting
Terminal Cable Size
2.5mm2
Table 2

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CDU LCD IP 20
CDU LCD IP 65
Fig 3.1: Whole Assembly Drawing

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4. TERMINAL CONNECTIONS
Fig 4.1: Terminal Connection Detail of FDU
Terminal No.
Description
24VDC +
24VDC -
Power Supply Input
RS 485 +
RS 485 -
RS 485 Communication Output
DI
Digital Input for Door status
Table 3
4.1 How to connect wires?
Before carrying out wiring, turn off the power to the unit and check that the cables to
be connected are not alive because there is a possibility of electric shock.
NOTE:
All wiring must confirm to appropriate standards of good practice and local
codes and regulations. Wiring must be suitable for Voltage, Current and
temperature rating of the system.
Provide power from a single-phase instrument power supply. If there is a lot of
noise in the power line, insert an insulating transformer into the primary side
of the line and use a line filter on the secondary side. Do not place the primary
and secondary power cables close to each other.
Use repeater after each set of 32 instruments connected in RS-485
Communication.
Unused terminals should not be used as jumper points as they may be
internally connected, which may cause damage to the unit.
Use >250V-1Amp Cable for Power Supply.
Supply voltage must be below maximum voltage rating specified on the label
If cable has two parallel wires inside then isolation between them must be 2.5
KV.
Fig 4.2: RS485 Connection Details

Model: CDU-LCD
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Issue no.00.06
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5. Start UP and Basic Operation
5.1 Power ON
On Power on unit displays model name, software version and initializing sequence
and after initialization shows RUN window as below.
Note: Run Window may differ as per model.
5.2 Use Interface
Every time CDU - LCD is switched on, initializing sequence ends in RUN mode.
Description of different element is as per below. Description of status bar is also
given below in next image.