Modbus control

number, bool ReadModbusRegister(string name)

Getting Modbus-register value.

Options:

• string name – the register name configured in the Modbus setup menu.

Return values:

• value – Modbus-register value. Returns the last successfully read value from the cache, refreshed at 100ms intervals (the frequency of updates may vary depending on certain conditions). Returns 0 if the value has never been successfully read;
• is_online – boolean value that determines whether the last attempt to read the value of the Modbus register was successful.

number, bool ReadModbusRegisterUpdated(string name)

Getting Modbus-register value without cash. The register value is requested every time the command is invoked.

Options:

• string name – the register name configured in the Modbus setup menu.

Return values:

• value – Modbus-register value;
• is_online – boolean value that determines whether the last attempt to read the value of the Modbus register was successful.

bool WriteModbusRegister(string name, number value)

Setting Modbus-register value.

Options:

• string name – register name configured in the Modbus setup menu;
• number value – the register value to be set (16-bit integer).

Return value:

• true – if the setting of the Modbus register value is successful.

number1, ... , numberN, bool ReadModbusMultipleRegistersUpdated(string name, number count)

Getting values of several Modbus registers in a row without using a cache.

Options:

• string name – register name configures in the Modbus setup menu;
• number count – number of requested registers.

Return values:

• value1, ... , valueN – Modbus-register values;
• is_online – boolean value that determines whether the last attempt to read the value of the Modbus register was successful.

bool WriteModbusMultipleRegisters(string name, number count, number value1, ... , number valueN)

Setting of several Modbus registers in a row.

Options:

• string name – register name configured in the Modbus setup menu;
• number count – number of registers to write;
• number value1, ... , number valueN – the register value to be set (16-bit integer).

Return value:

• true – if the setting of the Modbus register value is successful.