Siemens SINUMERIK 840Di Function Manual page 1369

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Error and operational messages are provided by the user in data block DB 2.

In DB 2, a "1" signal must be present for several OB1 cycles to ensure that a message can

also be displayed on the HMI. There is an upper limit for the number of interrupts and

messages that can be pending at the same time. This upper limit is dependent on the PLC

CPU. On PLC 317-2DP, the upper limit for messages pending simultaneously is 60.

Declaration of the function

STL representation

FUNCTION FC 10:

END_FUNCTION

Description of formal parameters

The table below lists all formal parameters of the AL-MSG function.

Call example

CALL FC 10 (

PLC Basic Program Solution Line (P3 sl)

Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0

//Error and operational messages

//Signals from DB 2 are transferred

//to interface

//Acknowledgment of

//error message carried out via

//input I6.1

Detailed Description

2.12 Block descriptions

1 = Transfer signals to user

interface every cycle.

1 = Acknowledge error messages.

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