system.opc.writeValue

Description

Writes a value directly through an OPC server connection. Will return an OPC-UA status code object. You can quickly check if the write succeeded by calling isGood() on the return value from this function.

Syntax

system.opc.writeValue(opcServer, itemPath, value)

Parameters

String opcServer - The name of the OPC server connection in which the item resides.

String itemPath - The item path, or address, to write to.

Object value - The value to write to the OPC item.

Returns

Quality - The status of the write. Use returnValue.isGood() to check if the write succeeded.

Scope

All

Examples

The following code will read a value, increment by one, write it back and report on the success of the write.

server = "Ignition OPC-UA Server"

path = "[SLCSim]_Meta:N7/N7:0"

oldQualifiedValue = system.opc.readValue(server, path)

newValue = oldQualifiedValue.getValue() + 1

returnQuality = system.opc.writeValue(server, path, newValue)

if returnQuality.isGood():

 print "Write was successful"

else:

 print "Write failed"