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44 Wonderware Siemens SIMATIC NET S7 I/O Server

WRITECOMPLETE Item

The WRITECOMPLETE item is used to access the state of pending write activities on

the corresponding topic. If the topic is opened the value of the WRITECOMPLETE

item is initially 1 indicating all write activities are complete - no pokes are pending. If

values are poked into any items of the topic the value of the WRITECOMPLETE item

changes to 0 indicating write activity is currently in progress. If the server has

completed all write activities the value of the WRITECOMPLETE item changes to 1 if

all pokes were successful or to -1 if at least one poke has failed. If the value of the

WRITECOMPLETE item is not zero the client can poke 1 or -1 to it ( poke a 1 to

clear errors or a -1 to test a client reaction on write errors).

I/O Type: INTEGER

ACCESS: READ/WRITE

RANGE: -1,0,1

Note Use the WRITECOMPLETE item to serialize a sequence of poke values into a

single item or to monitor success or failure of poking into one or more items.

STATUS Item

The STATUS item is used to access the state of communication between the server and

PLC. The discrete item, STATUS, is set to 1 when communication is successful or is

set to 0 when communication with the PLC fails.

I/O Type: DISCRETE

ACCESS: READ

RANGE: 0,1

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Siemens SIMATIC NET Guía de usuario Pagina 48