15.
If the program is not able to establish communication then
an error message is displayed. This happens either when the
wrong serial port is specified or when the cable is
disconnected.
16.
The procedure to disable Continuous Mode and change
the iDRN to Command Mode is as follows:
Using HyperTerminal, or any serial communication program,
type:
Ctrl + S
To change the device to Command Mode, type:
^AE
To change the Bus Format Register, type:
*W0814
To reset the device,type:
*Z01
Cycle power to the unit.
Modbus Register Definition
Reg. # Read Function
Write Function
# of byte
1
Input Range
Input Range
1
2
Input/Output Config.
Input/Output Conf.
1
3
Decimal Point
Decimal Point
1
4
Filter Time Constant
Filter Time Constant
1
5
Reading/Output Scale
Not supported
3
6
Reading/Output Offset Not supported
3
7
Comm. Parameters
Comm. Parameters
1
8
Comm. Bus Format
Comm. Bus Format
1
9
Comm. Data Format
Comm. Data Format
1
A
Comm. Device Addr.
Comm. Device Addr.
1
B
Comm. Recog. Char.
Comm. Recog. Addr.
1
C
Unit of measure
Not supported
3
D
Gate Time
Gate Time
1
E
Debounce Time
Debounce Time
1
F
Transmit Time
Transmit Time
2
10
Main Value
Hard Reset
3
11
Peak Value
Reset Peak
1
12
Valley Value
Reset Valley
1
13
Not Supported
L.S. bytes Output Scale
2
14
Not Supported
M.S. byte Output Scale
1
15
Not Supported
M.S. bytes Output Offset
2
16
Not Supported
L.S. byte Output Offset
1
Note:
1) Main, Peak, Valley value: 4 bytes will send from the unit
a. Highest byte always 00h.
b. 2nd Highest byte: (MSB is sign (1=negative, 0=positive),
next 3 bits are number of decimal points).
c. Low nibble of second byte, and lowest 2 bytes are the
value.
d. The decimal point register has to set to: 1, 2, 3, or 4.
2) Bus Format: Bit 5 1/0 = Modbus/Newport
3) Output Scale/Offset Write:
Due to write single only, two write operation is needed to
write scale/offset, and to make it effective it needs to
follow with Hard Reset command.
4) To configure to Newport protocol, set bit 5 of Bus Format
to low and follow with Hard Reset command.
3.
Determine the appropriate input signal range, i.e. 400 mV,
4 Volt, 40 Volt or 400 Volt. Also ensure that the frequency of
AC source is within the specified limits.
4.
Ensure that if the selected range is different from the default
then change the internal range by using the Setup Software
and select the appropriate range.
5.
Connect the signal input to screw terminal, and ensure that
the screws are tight. Failure to do so may cause electrical
shock should the wires become loose and come out of the
screw terminal.
6.
To verify that the set up is correct, you may connect a DVM
to the analog output. Once connected, power the signal
conditioner and apply a known voltage from an AC source to
input. Measure and compare with expected values. To
custom scale the analog output proceed to the next step.
7.
To view/change the scaling that relates the analog output to
signal input: connect the RS232 output of the signal conditioner to
an available serial port of a computer. The cable and the DB9 or
DB25 connectors are available as an option.
8.
Turn on the computer, start Windows 3.0 or higher and run
the Signal Conditioner Configuration Setup Program.
9.
Start the configuration program, you need to indicate which
serial port is to be used for serial communication by checking
the appropriate check box on the opening menu.
Note:
It is not necessary to know the serial communication
protocol. i.e. baud rate, parity, 7/8 data bit and stop bit; the
program will determine this information automatically.
However, it is good practice to mark the protocols used on the
signal conditioner label if different from default.
10.
Once the program starts it will automatically detect the
signal conditioner configuration and will display a window of
available options. To view the signal input click on the
display on/off.
11.
To change analog output scaling choose analog output
scaling and enter the desired values.
12.
Once the custom scaling is finished,
ensure that Send
Configuration is clicked,
otherwise the changes will not take effect.
13.
The input/output scaling may be fine tuned, while both
communication and analog output are active. In fact you may
make a change to the analog output in the configuration
program, and watch the DVM connected to analog output of
the signal conditioner follow the new settings.
14.
You may save or print a particular configuration by
selecting the file menu. It’s always a good practice to both
print and save the scaling of each signal conditioner.
5
6
iDRN-ACV
AC Voltage Signal Conditioner
M2533/0304
It is the policy of OMEGA
to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA
is constantly pursuing certification of its products to
the European New Approach Directives. OMEGA
will add the mark to every
appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA
Engineering, Inc. accepts no liability for any errors it contains, and reserves the right
to alter specifications without notice.
PATENT NOTICE:
This product is covered by one or more of the following
patents: U.S. Pat. No. Des. 336,895, 5,274,577/ Canada 2052599, 2052600/ Italy
1249456, 1250938/ France Brevet No. 91 12756/ Spain 2039150, 2048066/ UK
Patent No. GB2 249 837, GB2 248 954/ Germany DE 41 34398 C2.
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,
omega.com
®
are trademarks of OMEGA Engineering, Inc.
®
This device is marked with the international caution symbol. It is important to
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guide contains important information relating to safety and EMC.
WARNING:
These products are not designed for use in, and should not be used
for, patient-connected applications.
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OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
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BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE
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OMEGA’s policy is to make running changes, not model changes, whenever an improvement
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OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2004 OMEGA ENGINEERING, INC. All rights reserved.
This document may not be copied, photocopied, reproduced, translated, or reduced to any
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consent of OMEGA ENGINEERING, INC.
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