Documentation

MbusDataTableInterfacereadInputDiscretesTable Method

Override this method to implement a Data Provider function to read Coils.

Namespace:  FieldTalk.Modbus.Slave
Assembly:  FieldTalk.Modbus.Slave (in FieldTalk.Modbus.Slave.dll) Version: 2.11.0-eval+eb1ecbe71c969eff5d7c05d58da16dade0474678
Syntax
Copy
protected virtual bool readInputDiscretesTable(
	int startRef,
	bool[] bitArr
)

Parameters

startRef
Type: SystemInt32
Start register (Range: 1 - 65536)
bitArr
Type: SystemBoolean
Buffer which has to be filled with the reply data (Length: 0 - 2000). Each char repesents one discrete!

Return Value

Type: Boolean
true indicates a successful access and that valid reply data is contained in regArr. The Server Engine will reply the data passed in regArr to the master.

false indicates that access has been denied or is out of range. The Server Engine will reply to the master with an exception reply message

Remarks
When a slave receives a poll request for the 0:00000 data table it calls this method to retrieve the data.

Required: No

Default Implementation: Returns false which indicates to Server Engine that this address range is unsupported.

Examples
A simple and very common implementation is to map the Input Discretes to the same address space than the Coils table:
Copy
protected override int readInputDiscretesTable(int startRef, bool[] bitArr)
{
   return readCoilsTable(startRef, bitArr);
}
See Also