Carlo Gavazzi How to Program Universal Digital Panel Meter UDM 35 & 40 Series
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Carlo Gavazzi How to Program Universal Digital Panel Meter UDM 35 & 40 Series


Welcome to GTV! Today I will be showing you how to program Carlo Gavazzi’s UDM 35 and 40 Series Universal Digital Panel Meter using
the keypad. The programming of configuration parameters and the display may be controlled by means of the 4 function keys on the right side of the panel meter. To access the programming
menu, press and hold the enter key for 2 seconds. The display will indicate pass for password
then four zeroes will display. This prompts the user to enter the password. Each individual
digit is selected from left to right by pushing the escape key. Changing the value of each
digit is accomplished using these arrow keys here. When completed, press enter to confirm
this step. I will use the factory default password of “0000”. Once in programming mode,
the unit will revert to run mode if no entry is made for approximately 20 seconds. Movement
to a specific parameter heading is accomplished using the up and down arrow keys. I will push
the arrow key up to find the input selection heading marked by INP. I will push enter here
to access the inputs. I can use the arrow keys to select Range r1, r2, r3, r4, r5, and
r6. These values are defined on the instruction sheet that came with your device. Once the
range is selected push enter. LSX and HSX input modules offer True RMS marked by TRNS
or DC measurement marked by DC. Once the type is selected push enter. I can now change the
input signal integration time value or INTT. I can use the arrow keys to adjust this value
or choose auto when selecting all zeroes and the value will be calculated from 100 to 999.9
milliseconds. Press enter to confirm and then up to move to the next program sequence. For
the UDM40 this area of the selection would be the display color or COLR. The base unit
offers three display colors; red, orange or green. If using the UDM 35, instead of COLR
it should read DISP for display. The display can be configured as 3 ½ digit marked by
1999, or 3 digit + dummy zero, marked by 9990. Once selected I can push enter and up to go
to the next program sequence, which is SCAL or scaling. This allows access for configuring
the electrical input range, the decimal point position and display span. Changing the electrical
input range allows me to define an electrical input range different from the standard range
setup in the input programming. I will push enter to change the electrical input range.
LOE should appear. Using the escape key, I can select the digit to change and then adjust
with the arrow keys. I will keep this at 0 and press enter. Now HIE should appear. I
will set this to my desired range and press enter. The next parameter is DP or decimal
point. I can push the arrow keys to place the decimal to my desired location and then
press enter. The next parameter here is the display span, this allows me to define the
display span in engineering units corresponding to the previously defined electrical input
range. The LOD value represents the minimum displayed value and HID represents the maximum
displayed value. When LOD appears, I can press the escape key to the proper digit. The arrow
keys select the desired value. I will repeat procedure until all digits have been set,
and press enter to confirm and advance to the next step, HID. I can adjust this value
the same way as before and then press enter to confirm. I can now press up to advance
to the next program step sequence. For the UDM 40 models there is an option to enable
linearization. The next program should read LIN or linearization. Press the enter key
followed by the arrow keys to choose to ignore or enable linearization, and then press enter
again. Since I chose YES, I am prompted to enter the number of Linearization Points,
with a numerical value from 1 to 16 and then press enter. Next, the correlation between
the inputs and outputs must be defined in the program. LN.01 will be displayed. Press
the escape key to toggle through the positions, and use the arrow keys to select the value.
Press enter to confirm and advance. OU.01 will display next. I can select the desired
value and press enter to confirm. Repeat this procedure for each set of Inputs and Outputs,
up through a maximum of 16. Press the enter key to confirm and the up arrow to the next
program sequence. For this setting I will adjust the Alarm set points. There are up
to 4 alarm set points that can be configured. The first programming sequence is SP1. Press
enter to see the first parameter, Minimum Set-point Limit. LOS will be displayed. To
skip this step and advance to the next parameter, press the enter key. Otherwise, press the
escape key to select the proper numerical position to enter a value. Press the up/down
arrow keys to select the numerical value for each position. When completed, press enter
to confirm and advance to the next programming sequence. The next parameter is the maximum
set point limit or HIS. Press the escape key to toggle to the appropriate position. Then
use the up and down arrows to select the appropriate value for each position. Press enter to confirm
and advance to the next programming step. This should be the Set-Point, the actual value
that must be reached to trigger an output. It is listed as SET. When displayed, press
the escape key to toggle to the desired numerical position. Use the arrow keys to select the
appropriate value for each position. Press enter to confirm and advance to the next parameter
in the program sequence. Next is HYS for hysteresis; this is the point at which an active alarm
output must revert to for the alarm output to turn off. If an “up” alarm set point is
10.5, and I want to have the alarm reset at 10.3, then the Hysteresis value to set in
the program must be .2, and not 10.3. I will not need to be concerned about whether the
value is positive or negative since this is configured when I select the Down Alarm or
Up Alarm. I will now press enter to advance to the next step. Next is the off delay, labeled
as OFFD. When Off Delay is displayed I can opt to choose a value of 0 to 255 seconds.
I will use the escape key to toggle to the desired position and select the correct value
with the arrow keys. Press enter to confirm and advance to the next step. When OND or
on delay is displayed, I can choose a value between 0 and 255 seconds by following the
same steps when adjusting off delay. The next parameter is relay configuration, or RLY.
The set point alarm can be configured using the arrow keys to be normally energized, NE
or normally de-energized, ND. I will advance to the next step to configure the alarm type,
ALR, which allow for the selection of off, down alarm, up alarm, down alarm with disable
at power on, up with alarm latch, or down with alarm latch. Then I will push enter to
confirm. On the UDM 40, the option for configuring the display color for alarm event is available.
The choices are red, orange, green, or none. If none is selected the color will remain
the basic color during an alarm event. I will push enter to finish up with the set points
and move up to digital filtering or FILT. The digital panel meters are extremely fast
to follow the trend of input signals and to display the relevant values. Unlike in analog
panel meters, which tend to filter the input and present a more stable indication, the
fluctuations in digital panel meters can be quite fast and prevent the user from clearly
reading the displayed value. Fluctuations can also be introduced when the resolution
of the displayed value is higher than the input resolution. The use of a digital filter
results in higher stability of the displayed value. There are two types of filter parameters.
The first is FIL.S, it defines the operating range of the filter. Fil.S represents the
resolution wanted to assign to the display. The manufacturer suggests setting this parameter
to evaluate the amplitude of the fluctuation on the display. If a display value fluctuates
between 2.5 and 3.4, it means that the fluctuation is 9 digits and the Fil.S is set as “9”. The
second filter parameter is FIL.C. It represents the filtering coefficient. The higher the
value of Fil.C is, the smoother the curve of the displayed value. There is no theoretical
rule to define this parameter, but the manufacturer suggests starting with the same value of the
Fil.S coefficient and then increase it until the desired stability is reached. The digital
filter affects the values retransmitted via both serial communications and analog output.
Many times the displayed value must be retransmitted as an analog output. The low analog output
and high analog output are directly related to the parameters low display value and high
display value set earlier. The analog output can be addressed at AOUT. Before accessing
this menu it is important to remember that to assure proper coordination and retransmission,
the parameters are programmed as a percentage of the analog output full scale value according
to the type selection. I will hit enter to value to be entered must be 20, which is 20%
of the full scale 20 milliamps range. The value to be entered must be 20, which is 20%
of the full scale 20 milliamps range. The high analog output, or HI.A, must be 100 since
100%=20 milliamps. Because of this programming technique, it is possible to set a reverse
slope analog output characteristic. Next is the type of analog output signal with A being
20 milliamps and U being 10 volts. I will push enter and then up to find the next programming
section of SOUT. This is the serial port output. I can choose to configure a serial port address
by pushing enter and ADD will appear. I can use the escape key to toggle between the digits
and select the proper value of an instrument’s address from 1 to 247. I will push enter to
confirm and BDR will be displayed on the panel meter. This is the selection baud rate. I
can use the arrow keys to select the desired baud rate in kilobits per second. I will push
enter to confirm and up to the last program sequence. This program sequence is CND, the
external command from the input module, terminals 6 and 7. I will push enter and I can choose
C1 for the hold function, C2 for disabling the keypad, or C3 for the Reset of Latch Alarms.
I will choose one and push enter to confirm. Carlo Gavazzi’s UDM 35 and 40 Series Universal
Digital Panel Meter, along with thousands of other products and services are available
at galco.com.

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