AnalogPoint

The AnalogPoint component is a network point class component, which allows to read and write analog values to a defined Modbus holding register in the remote device.

Note: Before using the component, make sure that its register address is assigned and its Status is OK.

The AnalogPoint component includes an action that allows to set its Out value in case no Data Point class component is linked to it.

The AnalogPoint component

Slots

The AnalogPoint component slots

The AnalogPoint component has the following slots:

• Status: indicates the current status of the component; if the component works properly, its status is OK. The component becomes Disabled, once the Enabled slot is in false. The component's status is Fault, once the Address slot is null. If there is no response from the addressed point, the component goes into the Down status.
  • Available information: Disabled, Fault, Down, OK.
• Reference: a special slot allowing to connect network point class components with Data Point class components. It allows to transfer the Out slot value along with the component's status.

Note: Reference links from Data Points to network points also transfer values in the opposite direction, in a link-back-from process: having received a value by the Reference link, the network point transfers it back to the Data Point to whichever input priority from 1 to 16 is set in the network point.

• Description: an additional detailed information about a component that may be freely described by the user; the description may contain individual coding, defined in the user's system documentation, meter's or sensor's location, or any other information the user finds applicable.

Note: The description is effectively added only if the  point allows it–the description is not added internally in the RAC18-IP for the remote point, but it is sent directly to the point.

• InputPriority: allows to indicate the input number in the Data Point, which the network point class component's output value is sent to, in case the network point detects the change on its Out slot; none priority is set by default.
  • Available settings: none, 1-16.
• Polling Mode: allows to set the frequency of sending polling requests for the point's value to remote devices—by default, the polling mode is set to normal;
  • Available settings: fast, normal, slow;
• Enabled: change of the slot's value enables or disables the component.
  • Available settings: true (enabled), false (disabled).

Note: If the Enabled slot is in false (meaning the component is disabled), the Status slot becomes Disabled.

• Out: a real value read from or written to the register of the remote device.

Note: If the component's Status is fault (e.g., an invalid value in the Address slot), the Out value is null.

• Units: defines a unit of the Out slot value; no unit is set by default;
• Scale: sets a fixed scaling factor for output linearization; the written value is calculated according to the inverse linear function formula (x=(y-b)/a), and the calculated value is read to the Out slot according to the linear function (y=ax+b); the Scale slot sets the a value of the formula;  incorrect scaling of the results in the calculated value (exceeding the available range for the device, e.g., 0-10 V), results in indicating a different value on the input and on the Out slot. If the scaling is correct, the values are identical; 
• Offset: sets a fixed offset value to the output value; the value is calculated according to the inverse linear function formula (x=(y-b)/a) and read to the Out slot according to the linear function (y=ax+b); the Offset slot sets the b value of the formula;  incorrect scaling of the results in the calculated value (exceeding the available range for the device, e.g., 0-10 V), results in indicating a different value on the input and on the Out slot. If the scaling is correct, the values are identical;
• Address: allows setting an address of the Modbus register in the remote device; once the component has been added, the slot's default value is null—for the component to operate properly, the unique address value must be set in this slot.

Note: The Modbus register address is set in decimal format.

• Data Type: allows to set the format of the analog value read or written to the remote device's register;
  • Available settings: Int (integer), SInt (signed integer; including values less than 0), Long (for 32-bit values, reads two subsequent registers).

Action

• Set: sets a value to the Out slot—in case no Data Point is linked to the output network point, it is possible to set its Out value with this action.