CONTENT
1. INTRODUCTION
CENTO is a multifunctional software platform for data collection, processing, and display. This Guide contains a description of setting up metering of electricity, energy resources, as well as other types of metering.
It is assumed that the user, having read the instructions "User manual" and "Setup manual", is already familiar with the main elements of the interface and how to configure CENTO.
2. ELECTRICITY METERING
2.1. Device setup
CENTO software can work with a variety of metering devices that have the ability to measure and store power and power profiles. The metering function is enabled by adding the metering protocol corresponding to the device on the Device editing page (Settings > Devices, tags, channels > Devices), then, similar to other polling protocols, the parameters of communication with the device (RTU address, TCP/UDP port, timeout and number of connection attempts) and scheduled polling parameters (cron of CENTO rules) are specified, to configure electricity metering, the file number is specified in the "File#" field, which stores power and power profiles.
We will consider the survey of historical data of interval values of accumulated electricity using the example of SATEC devices. For this purpose, the SATEC (Modbus TCP) protocol is used (see Fig 2.1).
Figure 2.1. Settings of the E/E metering protocol
Setting up the E/E metering protocol contains the following fields:
Selection of the accounting protocol from the drop-down list and its inclusion in the survey.
Setting up a poll according to the Cron rule (there can be several) with set attempts and timeouts.
Specifying the network address of the device and the port for the TCP connection.
Serial number of the E/E metering data file in the device's memory (for devices of the Satec type).
Device administrator password.
Coefficients of conversion of interval values of readings/power (depends on the type of metering device, as well as on the type of connection (direct or with measuring transformers).
Transformation coefficients of current and voltage transformers, meter coefficient.
Specifying the TCP connection number for parallel polling of one device (for example, if the device is connected via a Modbus TCP/Modbus RTU converter, then the number of the trunk to which the device is connected is specified).
Selection of energy/power profile.
Enabling/disabling the time synchronization of the device on the CENTO side, with the configured period of maximum time correction in seconds, as well as the permissible deviation.
Enabling/disabling a particular channel.
Serial number of the record (metering channel) in the E/E metering data file in the device's memory (for devices of the Satec type).
When this option is enabled, the specified numbers of energy and power files are not taken into account.
Enabling/disabling reading logs from the device.
Rounding of channels.
Viewing and changing the metering parameters in the memory of the metering device is carried out in accordance with the instructions of the operating manual for this device.
2.2. Setting up metering channels
Electricity meters often do not need to manually add channels to the list of tags, so all the settings are in the metering protocol. The display of the used accounting channels from the protocol automatically appears on the Tags, channels tab, but with a ban on editing actions.
Figure 2.2. Display of metering channels
Clicking on the channel name or its ID, redirects to the Device editing: editing page, as shown in Fig. 2.1.
The forms for filling in the fields for setting up electricity metering protocols are different and depend on the type/model of the device, instructions for working with the protocols can be described in different manuals and, if necessary, provided to the User.
3. ENERGY METERING (COMING)
3.1. Device Setup (Coming)
4. OTHER TYPES OF METERING
In addition to metering electricity and energy resources, the CENTO software supports tracking of operating time, emissions and discharges, as well as product accounting.
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.
5. CALCULATED CHANNELS
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).
Figure 5.1. List of calculated channels
5.1. Channel from tag
To create a new metering channel from real-time data (tags), click the button 
Then the Channel from tag:
editing page opens. When adjusting an already created metering channel, the page Channel from tag: editing will open (see Fig. 5.2).
Figure 5.2. Channel from tag: editing
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:
ID of the tag on the basis of which the calculation channel will be created.
Selection of the device in the object tree from which the specified tag ID is taken.
Function for processing parameter values.
Value aggregation interval.
Processing the calculated channel with formula input.
5.2. Calculated channel
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 
When adjusting an already created metering channel, the Settlement channel: editing page opens (see Fig. 5.3).
Figure 5.3. Metering channel: editing page
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.
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 
and the following variables for power channels:
- ea_imp - energy A+
- ea_exp - energy A-
- er_imp - energy R+
- er_exp - energy R-
- pa_imp - power A+
- pa_exp - power A-
- pr_imp - R+ power
- pr_exp is the power of R-
- ra_imp - A+ readings
- ra_exp - A- readings
- rr_imp - R+ readings
- rr_exp - R- readings
5.3. Calculated channels via Information Model
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 
as shown in Fig. 5.4.
Fig. 5.4 – Creating a Formula Template
Figure 5.5. Creating custom formula