Siemens SIMATIC NET Guide de l'utilisateur télécharger pdf (Page 45)

Item Names 41

Note All Alarms and Events are Read only (<EV_ID> is the ID defined by Step7, in

integer format, filled with leading zeros up to 6 characters; w=1 to 10; x=0 to 65,535;

n=0 to 65,534; m=0 to 65,532; y=0 to 7; v=1 to net PDU data size/type size - header

information, this size may vary). The longest string or array that can be read in a cyclic

service has the length of the PDU size minus 32 bytes. The longest string InTouch can

process is 131 bytes. Arrays are converted into HEXASCII strings representing the big

endian format of the binary data. The Wonderware Siemens SIMATIC NET S7 I/O

Server will not process writes (POKES) to Alarms and Events.

Note This version of Wonderware Siemens SIMATIC NET S7 I/O Server does not

allow acknowledgment of Alarms and Events.

Examples:

ALARM000010.TIME_STAMP

EVENT001234.ADD_VALUE2,LENGTH

ALARM000555.ADD_VALUE10,REAL0

EVENT000001.ADD_VALUE3,D0TOD

Some additional explanations:

EVENT_STATE: State of the Alarm/Event itself. If the Alarm/Event is

TRUE, then EVENT_STATE is TRUE and vice

versa. Please refer to the Step7 documentation for

more detailed information.

STATE: The state of the communication. Please refer to the

Step7 documentation for more detailed information.

ACK_STATE: The state of the acknowledgement of coming or going

Alarms/Events. Please refer to the Step7

documentation for more detailed information.

TIME_STAMP: Time stamp of the Alarm/Event, provided by the PLC.

NO_ADD_VALUES: Number of additional values that are sent with this

Alarm/Event message.

ADD_VALUEw,DATA_TYPE: Data type of a specific additional value of an

Alarm/Event

ADD_VALUEw,LENGTH: Length of a specific additional value of an

Alarm/Event

<EV_ID>: The event ID is created automatically by the Step7

programming software. In case of Alarms (FB33 to

FB36) this is the EV_ID-parameter of the function

block. The value of the parameter must be converted

from hexadecimal to decimal and then filled up with

leading „0“ to the length of 6 characters (e.g.: EV_ID:

DW#16#4E25 => <EV_ID>: 020005). In case of

Events (Generated by the symbol editor) this is the

„Message Number“. This number is in decimal format

and must be filled with leading „0“ up to 6 characters

(e.g.: „Message number“: 20000 => <EV_ID>:

020000).

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Siemens SIMATIC NET Guide de l'utilisateur Page 45

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