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Changes for page 3. Metering Channels

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106 106  
107 107  Metering can be implemented not only on the basis of specialized metering devices, but also performed in the CENTO software itself on the basis of tags (real-time data). For example, using information about the state of the equipment (0 - disabled and 1- enabled), the user can set up a metering channel that will calculate the operating time of the equipment. And using the processing functions (see Section 5 of this manual), you can form metering channels (increments) from the current capacity, instantaneous flow or an ever-growing meter.
108 108  
109 +== 5. CALCULATED CHANNELS ==
110 +
111 +If the device installed at any connection does not have the function of storing interval values of electricity/power in the memory, as well as archived values for other types of metering, CENTO has the function of generating interval values from tags (real-time data). In order to create a metering channel, go to Settings > Devices, tags, channels > Calculation channels (see Fig. 5.1).
112 +
113 +[[image:Screenshot 2025-11-30 at 16.26.53.png]]
114 +
115 +Figure 5.1. List of calculated channels
116 +
117 +=== 5.1. Channel from tag ===
118 +
119 +To create a new metering channel from real-time data (tags), click the button [[image:Screenshot 2025-11-30 at 16.28.39.png||height="18" width="92"]]
120 +
121 +Then the **Channel from tag:**
122 +
123 +**editing** page opens. When adjusting an already created metering channel, the page **Channel from tag: editing** will open (see Fig.  5.2).
124 +
125 +[[image:Screenshot 2025-11-30 at 16.29.45.png]]
126 +
127 +Figure 5.2. Channel from tag: editing
128 +
129 +On the page that opens, specify the name of the channel, its ID (it is written automatically when created, and it does not change for the existing one) and the Code (an optional field), the category of the parameter – electricity/energy resources/technology/emissions/diagnostics/time and the corresponding categories of units of measurement, whether the metering channel has metrological significance, and also fill in the fields:
130 +
131 +[[image:Screenshot 2025-11-30 at 16.30.29.png]]
132 +
133 +ID of the tag on the basis of which the calculation channel will be created.
134 +
135 +[[image:Screenshot 2025-11-30 at 16.30.53.png]]
136 +
137 +Selection of the device in the object tree from which the specified tag ID is taken.
138 +
139 +[[image:Screenshot 2025-11-30 at 16.31.25.png]]
140 +
141 +Function for processing parameter values.
142 +
143 +[[image:Screenshot 2025-11-30 at 16.31.55.png]]
144 +
145 +Value aggregation interval.
146 +
147 +[[image:Screenshot 2025-11-30 at 16.32.28.png]]
148 +
149 +Processing the calculated channel with formula input.
150 +
151 +=== 5.2. Calculated channel ===
152 +
153 +To create a channel that processes the values of several connections, or interval values, for example, summing up electricity consumption by a group of consumers (total energy consumption) or calculating the balance of consumed energy, click the button on the **Calculated channels** tab (see Fig. 4.1), then click [[image:Screenshot 2025-11-30 at 16.33.58.png||height="22" width="116"]]
154 +
155 +When adjusting an already created metering channel, the **Settlement channel: editing** page opens (see Fig. 5.3).
156 +
157 +[[image:Screenshot 2025-11-30 at 16.34.28.png]]
158 +
159 +Figure 5.3. Metering channel: editing page
160 +
161 +On the page that opens, specify the name of the channel, its ID (it is specified automatically when created, but it does not change for the existing one) and the Code (an optional field), the category of the parameter – electricity/energy resources/technology/emissions/diagnostics/time and the corresponding categories of units of measurement, the object and device to which the parameter will be linked.
162 +
163 +In the **Template** field, specify the formula for processing the values of all parameters used in the calculation. The formula can use arithmetic operations, conditions, mathematical functions that are specified in [[image:Screenshot 2025-11-30 at 16.35.23.png||height="30" width="135"]] and the following variables for power channels:
164 +
165 +* ea_imp - energy A+
166 +* ea_exp - energy A-
167 +* er_imp - energy R+
168 +* er_exp - energy R-
169 +* pa_imp - power A+
170 +* pa_exp - power A-
171 +* pr_imp - R+ power
172 +* pr_exp is the power of R-
173 +* ra_imp - A+ readings
174 +* ra_exp - A- readings
175 +* rr_imp - R+ readings
176 +* rr_exp - R- readings
177 +
178 +=== 5.3.  Calculated channels via Information Model ===
179 +
180 +For calculation channels of the same type, it is possible to define custom formulas that operate based on Information Model objects and their attributes. In addition to tags and channels, the Information Model can also supply supplementary data (e.g., reference information). To create a template, click the create template button [[image:Screenshot 2025-11-30 at 16.36.34.png||height="27" width="26"]] as shown in Fig. 5.4.
181 +
182 +[[image:Screenshot 2025-11-30 at 16.37.01.png]]
183 +
184 +Fig. 5.4 – Creating a Formula Template
185 +
186 +[[image:Screenshot 2025-11-30 at 16.37.47.png]]
187 +
188 +Figure 5.5. Creating custom formula
189 +
190 +As shown in Fig. 5.5, the custom formula creation window requires input of the formula name, an optional identifier code, and the formula expression. An example demonstrating the calculation of losses in cable lines is provided in Fig. 5.6.
191 +
192 +[[image:Screenshot 2025-11-30 at 16.38.43.png]]
193 +
194 +Figure 5.6. Calculation formula
195 +
196 +[[image:Screenshot 2025-11-30 at 16.39.09.png]]
197 +
198 +Figure 5.7. Using calculation formula
199 +
200 +Fig. 5.7 shows the application of the calculation formula:
201 +3*IM{Object identifier IM}.r_ohm_per_km*pow(agg("mean","{line current}","{Interval}"),2)*0.001, where:
202 +
203 +* **IM{Identifier of the IM object}. r_ohm_per_km **– reference to the value of the attribute with the code **" r_ohm_per_km " "** of the information model object
204 +* **Pow **– exponentiation
205 +* **Agg **is an aggregation function
206 +* **Mean **– average value for the time interval
207 +* **{line current} **– a link to the tag ID
208 +* **{Interval} **– data interval.
209 +
210 + The braces **{ }** contain the arguments that need to be entered in the data entry fields as in Fig. 5.7.
211 +
212 +=== 5.4. Downloading/Uploading calculated channels ===
213 +
214 +The** Downloading/Uploading configuration files** page (Settings > Configuration files) provides functionality for importing and exporting calculation metering channels using Excel files.
215 +
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