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Preconfiguration "PmModbus - AMiT modules DMM (Modbus RTU) - Communication set with data and panel"

Communication by the Modbus RTU protocol with AMiT IO modules of the DMM series.. See Communication with the IO modules by the AMiT company.
 
This preconfiguration can be activated when creating a new object (e.g. by "New object ..." in the local object menu or after pressing the Insert key after selecting the object) and is included in the group: " / Communication / Modbus communication protocol".

This preconfiguration can be used with the objects: PmaFolder or PmaRoot.

 
The preconfiguration creates an object of the PmaComm type and data for the corresponding number of analog and digital inputs and outputs. Also the panel with complex Pmg objects is created for displaying their status. This allows to define the required number for the specific connected device.
 
The preconfiguration is created for serial link Modbus RTU. The modules use the RS485 bus for communication. It is important to ensure that additional communication parameters are correctly configured (device address, port number, transfer rate, parity, ...) The configuration procedure of the devices is described in the documentation provided by the manufacturer. The communication parameters in the PROMOTIC application are defined in Setting the parameters of the serial link of the PmaComm object and in Parameters of the PmaCommGroup object.
 
- The preconfiguration creates an object of the PmaFolder type containing PmaComm object with PmaCommGroup subobject and following objects: PmaPanel, PmaData.
- The preconfiguration is created including the panel (object of the PmaPanel type) is functional also a Web panel.
- The panel is used for communication testing and it is not essential for the functionality.
 
In the PmaComm object named "Comm" the communication parameters are set (Serial port, Baud rate ...).

The PmaCommGroup object named "data" includes a "Parameters" tab where Special Parameters are defined (see PmModbusMr - Driver for communication by the Modbus Master protocol). On the "Data" tab, the items are imported by data extension of items defined in the PmaData object (see ExtComm). Each Data corresponds to the selected device type by its structure and name.

 
Some types of the I/O modules (DMM-DI24) allow to use any of the binary inputs as counters. In this mode it is possible to read the walues but also write (reset the counter). Detailed specification and limitation is described in the documentation supplied by the manufacturer.
 
This preconfiguration is not designed for modules of the DMM-FCx type. These devices allow only reading/writing to the specific addresses in the Modbus communication that has specific meaning.
These configurators can be set before the preconfiguration is created:
The name of created objectName of the object created in the tree of Pma objects. The maximum name length is 30 characters. This is a system name, so it must contain only alphanumeric and must not contain any diacritics, empty string, spaces and the first character must not be a number.

Default: "CommAMiT_DMM"

Serial portSelection of the communication serial port.

The value can be change by the OpenPort method. The value can be detected by method GetProtParam(""SerPort"").

After the preconfiguration is created, the "PmaComm > Setting the parameters of the serial link > Serial port" configurator will be set to this value.

Not set - The object is not connected to any port after starting the application and the serial port can be selected dynamically by the algorithm (by the PmaComm.OpenPort method).
COM1, COM2,..,COM66 - The specified serial port is opened after starting the application. This port must be correctly configured and accessible in the OS Windows (no one can use it).

For serial link each PmaComm object must have defined another communication port. For example, if one PmaComm object communicates through COM1, then next PmaComm object can communicate for example through COM2 (COM3, ...) but it mustn't communicate through COM1.

Baud rateSelection of the baud rate (bps, bit per second).

This configurator sets the initial value of the BaudRate property.

After the preconfiguration is created, the "PmaComm > Setting the parameters of the serial link > Baud rate" configurator will be set to this value.

110
300
600
1200
2400
4800
9600
14400
19200
38400
57600
115200
128000
256000
I/O module addressValid device address within the MODBUS network.

After the preconfiguration is created, the "PmaCommGroup > Parameters > Special Parameters > Default PLC address" configurator will be set to this value.

Communication refresh rate [ms]The time period in milliseconds to be used for reading the current data by the PROMOTIC application.

After the preconfiguration is created, the "PmaCommGroup > Parameters > Communication refresh rate [ms]" configurator will be set to this value.

Number of analog inputsPossible to enter the number according to the device type
Number of digital inputsPossible to enter the number according to the device type
Number of digital inputs used as countersPossible to enter the number according to the device type
Number of digital outputsPossible to enter the number according to the device type

History:
Pm8.00.10: Created
PROMOTIC 9.0.14 SCADA system documentation - MICROSYS, spol. s r.o.

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