RMG ERZ 2000 User manual

ERZ 2000

Short Operating Instructions

RMG Messtechnik GmbH Status: Dec. 19, 2006

V 1.3

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CONTENTS

1OVERVIEW OF FUNCTIONS...................................................................................................5

2EXPLANATION OF THE MOST IMPORTANT KEY FUNCTIONS, FAQS ..............................6

2.1 Levels and rights of access..................................................................................................................6

2.1.1 Display modes, user profiles and visibility levels.............................................................................6

2.2 Fundamentals for accessing data.......................................................................................................7

2.3 Entering the user code ........................................................................................................................9

2.4 Setting the device type.......................................................................................................................10

2.4.1 Description of the update procedure ...............................................................................................10

2.5 How to activate the device again following a software update?....................................................11

2.6 Entering texts.....................................................................................................................................12

2.7 How to parameterize the pressure sensor?.....................................................................................13

2.8 How to parameterize the temperature sensor?...............................................................................14

2.9 Where are the gas meter parameters to be found?........................................................................15

2.10 Which operating modes of the gas meter are available? ...............................................................15

2.11 Special information about parameters for volume at measurement conditions..........................16

2.12 Logic of synchronous run.................................................................................................................18

2.13 How to activate error curve linearization?.....................................................................................19

2.14 How does error curve linearization function for volume measurement?.....................................20

2.15 How to activate direction switching?...............................................................................................22

2.16 How to select a method for calculating the K coefficient?.............................................................23

2.17 How does the device process gas quality data?...............................................................................24

2.18 Changing units...................................................................................................................................25

2.18.1 How to change over totalizers to another unit? ..........................................................................25

2.18.2 How to change over measured values to another unit? ..............................................................25

2.19 Where to set the DSfG parameters?................................................................................................26

2.20 Time system .......................................................................................................................................27

2.21 Where to set base values for pressure and temperature?..............................................................28

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2.22 Special information about test functions........................................................................................29

2.22.1 On-the-fly calibration................................................................................................................. 29

2.22.2 Freeze......................................................................................................................................... 29

2.22.3 Calibration standard density / superior calorific value .............................................................. 29

2.22.4 Functional test............................................................................................................................ 29

2.22.5 Hardware test ............................................................................................................................. 30

2.23 Special information about analog measuring inputs..................................................................... 30

2.24 Special information about outputs.................................................................................................. 31

2.24.1 Current outputs .......................................................................................................................... 31

2.24.2 Pulse outputs.............................................................................................................................. 31

2.24.3 Contact outputs .......................................................................................................................... 32

2.25 Miscellaneous.................................................................................................................................... 33

2.25.1 Where is the revision switch to be found? ................................................................................. 33

2.25.2 Determination of correction factors to calibrate current inputs ................................................. 33

2.25.3 Display settings.......................................................................................................................... 33

2.25.4 Special information about the ID display .................................................................................. 34

2.25.5 Resetting the slave pointers ....................................................................................................... 34

2.26 Interfaces........................................................................................................................................... 35

2.26.1 Front panel Com-F..................................................................................................................... 35

2.26.2 Rear panel COM 1 to COM 5.................................................................................................... 35

2.26.3 Rear panel CAN bus .................................................................................................................. 35

2.26.4 Rear panel Ethernet.................................................................................................................... 35

3MODBUS CONCEPT OF THE ERZ 2000...............................................................................36

3.1 MODBUS registers........................................................................................................................... 38

3.2 Optional extension with a plug-in card........................................................................................... 63

3.3 Allocation of functions to unoccupied outputs............................................................................... 64

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1 Overview of functions

Keys 0 to 9 have more than one function. The current function depends on the operating condition. In normal

display mode, the text below the key applies and allows measured values or chapter headings and functions

to be directly or indirectly accessed. In input mode, the text on the key itself applies. You can enter numbers

and, in extended mode, also letters. Entering letters is similar to the method used for mobile phones.

Function keys Key legend

Measured values P,T.. 1

Analysis 2

Orifice 3

I/O (inputs/outputs) 4

Archive 5

Test 6

Totalizer 7

Flowrates 8

Meter 9

Mode 0

ID ±,

Select (selects a chapter) *

Backspace function Í

Alarms (displays or clears messages)

Use the keys 1, 2, 7 and

8 to directly display the

most important measured

values. Use the keys 3, 4,

5, 6, 9 and 0 to access

the relevant headings

and chapter overviews.

The * key for "Select"

will always show the

current chapter. Use the

Íkey to go back to the

last 50 times you have

pressed a key.

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2 Explanation of the most important key functions, FAQs

2.1 Levels and rights of access

The ERZ 2000 system provides three access levels to change parameters or device settings. The lowest level

is the user level which is protected by code. It is marked B, C or P in the documentation.

The second level is protected by the official calibration lock in the form of a sealable turn switch. It is

marked E in the documentation.

The higher level is the special-purpose level (superuser) which is reserved for type changes, etc. The special-

purpose level can be reached by entering the code and by additionally opening the calibration lock. It is

marked S in the documentation.

A symbol (point, rhombus or blank) indicates whether a value displayed can be edited. The symbol is located

between the line information and the text, e.g.

Any column, line 2:

02 Input value

Blank: Value cannot be edited

Any column, line 9:

09 •Lower alarm limit

Point: Value can be edited but is locked by means of the user code or the official calibration lock

09 ♦Lower alarm limit

Rhombus: Value has been enabled for editing.

2.1.1 Display modes, user profiles and visibility levels

Dynamic hiding or showing of displays in the coordinate system depends on several factors. Firstly, the

device type set (ERZ 2004, ERZ 2104, etc.) determines which functions are relevant and only those are

shown.

Secondly, there are visibility levels which can make further restrictions. These levels have been given names

which correspond to the scope or range of displays shown.

The lowest level is the "Gas meter reader" who can access only a few useful displays or overviews via the

keyboard while the rest cannot be accessed by him/her. This level can be selected by the user.

The next level up is the standard setting and is named "User". With this setting, all measured values,

parameters, auxiliary quantities, etc. which are useful for the selected device type and the chosen operating

modes are visible and can be edited.

Above this level there is another level which is called "Service". At the service level, there is no dynamic

hiding or showing as with the "User" level and the service staff can view all values even those which are not

directly needed in the current operating mode.

The topmost level is the "Developer" user profile. In this mode, additional auxiliary quantities and

intermediate values are shown which may be useful for diagnostic purposes if a fault occurs.

You can select the visibility level with the <0> Mode key in the Display chapter.

We would recommend setting the visibility level at "Service" before you start to parameterize

the device.

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2.2 Fundamentals for accessing data

All variables and measured and calculated values are grouped into several tables in order to show associated

functions. Each table represents a matrix with fields from AA 01 to AZ 99, or BA 01 to BZ 99, or CA 01 to

CZ 99, etc. All tables together form the coordinate system.

Tabular structure:

Each table has a name which appears as chapter heading.

Each column has a chapter name, while the fields (coordinates) are the functions.

Example:

Mode

Basevalues

PB select

TB select

TM select

…

Billing mode

Current plain text

Current billing mode

…

Access

Revision mode

Codeword 1

Codeword 2

…

Display

Language

User profile

…

The <0> Mode key shown in the example above enables central access to the chapter headings. When you

press the <0> key, the ERZ 2000 will jump to table E and display the first chapter Base values and the

following chapters which can be browsed through using the Cursor Up or Down key. When you browse

through the chapters, an arrow →appearing in front of the chapter selected is used for orientation. Press

Enter to access the functions of the chapter to which the arrow points.

Starting from the central point (table E) which you access by pressing the Mode key, you can easily

browse through all tables from the beginning (A) to the end (P) using the Cursor Right or Left key.

The <*> Select key fulfils an important function as it helps you orient yourself in the coordinate system and

select the desired chapter. Using this key, you can switch back from any location in the coordinate system to

the current chapter with heading etc. If you press the <*> key once again, you are referred back to the

function (coordinate) where you came from.

Chapter heading = name of the table

Chapter Function

Chapter

Function

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Whenever the device shows a view with a chapter heading, you can access all chapters of the entire

system by pressing the Cursor Right or Left key. When you have reached the desired chapter

heading, press the Cursor Up or Down key to access the chapter or press Enter to activate the

function.

If you are inside a chapter (i.e. in a column of the table with the functions), you can also browse through all

chapters of the complete coordinate system by pressing the Cursor Right or Left key. During the time you

are browsing, the current coordinate is displayed for approx. 2 seconds in the fourth line.

Further guidance is provided by the option of permanently showing the coordinate of the current field

together with each value displayed. To do this, press <0> Mode and browse downwards to Display. Then

press Enter and the Cursor Up or Down key to access the Coordinates function and set the parameter to

"Yes". Now all fields will be displayed together with their coordinates. Since the 4-character coordinates

will then appear, long texts exceeding 20 characters per line will be truncated on the display.

The function keys 1, 2, 7 and 8 represent a special case. When you press one of these keys, you make

a first preselection which will result in an overview of measured values and results. Then use the

Cursor Up or Down key to select the desired chapter and press Enter.

Example:

If you press <2> Analysis, the following overview will be displayed:

→AGA 8 92DC

Z 12.845

K 0.97211

Zm 0.969556

The arrow is located on the first line and can be moved

upwards or downwards using the cursor keys. In this

example, pressing Enter will select the AGA 8 92DC

chapter. A new window will open with the Compressibility

heading. The contents of this chapter can be browsed using

the cursor keys.

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2.3 Entering the user code

The lowest access level is protected by the user code. The code is divided into two 4-character parts and has

to be entered in two subsequent coordinates. In the operating instructions, the relevant data are marked Β(for

user lock). A special case is the marking C for the user code itself.

To enter the user code, press <0> Mode and enter the code in the Access chapter under the Codeword 1 and

Codeword 2 functions.

Mode

Base values

Billing mode

→Access

Then the following display appears:

Access

♦Codeword 1

****

If the code has been entered correctly,

the Power LED at the top left of the

front panel will start to flash.

The rhombus indicates that code entry has been enabled. The

four asterisks stand for the first part of the 8-character code.

After you have pressed Enter, the display will turn a bit

darker and the four asterisks will disappear. Now you have

to enter the first four characters of the code correctly in the

third line. Press Enter to terminate your inputs and use the

Cursor Down key to browse to codeword 2. Now press

Enter again to switch over the display to input mode (darker)

and enter the second part of the codeword.

The arrow is already located on the third line on Access. In

this example, pressing Enter will select the correct chapter.

A new window will open with the Access heading. Use the

Cursor Down key to select the first codeword.

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2.4 Setting the device type

If the device is not used for custody transfer applications, the ERZ 2000 which exists in the following

variants

•gas volume corrector (ERZ 2004),

•superior calorific value corrector (ERZ 2104),

•density corrector (ERZ 2002) or

•density corrector with energy (ERZ 2102)

can be switched over from one version to another after the calibration lock has been opened.

To do this, you have to be on the topmost access level (superuser). Press <0> Mode, select the Identification

chapter and then the Device type function to browse the variants. Press Enter to confirm your selection or

change over to another variant.

If the device is used for custody transfer applications, this changeover option is disabled and you can

only operate the version which has been set in the factory and corresponds to the type plate fixed to

the front panel.

The device can only be changed over from a gas volume corrector to a superior calorific value corrector if

you change the software.

Use the front interface to load the software of the other device type into the device.

2.4.1 Description of the update procedure

•Connect the front interface of the ERZ 2000 to your PC’s serial interface using a null modem cable.

•Start a terminal emulation program, e.g. under Windows Start / All Programs / Accessories /

Communications / Hyperterminal. At the first start, establish a new connection with 115200, 8, no parity,

1, no handshake and save this setting.

•Set the ERZ 2000 to superuser mode.

Enter codeword 1.

Enter codeword 2.

Open the calibration lock.

Follow the above sequence of operations.

•Now prepare the ERZ 2000 for the update. Press <0> Mode and in the Access chapter set the Software

update function to ON. The ERZ 2000 terminates the correction process and from now on it is only

waiting for the software update to start. Observe the outputs on the ERZ display. You can still cancel the

process initiated by pressing the <0> key of the ERZ. Watch the display output of the hyperterminal

program. The character C should appear at one-second intervals.

•Now transfer the new application into the ERZ 2000. The program consists of a set of files which were

packed in a ZIP archive. Select the ZIP archive under "Transfer/Send File" in Hyperterminal and send it

using the "Ymodem" transfer protocol. Watch the progress bar in Hyperterminal and the associated

display on the ERZ.

•After the transfer is complete, the ERZ 2000 checks the ZIP file for validity and consistency and reports

the result on the Hyperterminal display. If the result is negative, the ZIP file will be destroyed in the ERZ

so that the previous application is preserved. If the result is positive, the unpacking process will be

integrated into the booting-up procedure of the ERZ 2000. So the new application will be automatically

unpacked and activated with the next restart of the ERZ 2000.

•The ERZ 2000 will perform this restart automatically.

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