FB_PN_ALARM_DIAG

FB_PN_ALARM_DIAG 1:

Diagnosis alarms can be read out using this function block. Each instance of this function block makes a PLC input available (“PnIoBoxDiag”). This input must be linked to the “PnIoBoxDiag” input of the device that is to be evaluated. After successful reading of the diagnosis alarms/warnings, the alarm status of the device is reset. The function block must be called once for each PROFINET device. A running index (iNrAlarms) indicates how many diagnosis alarms have been read from the buffer.

VAR_INPUT

VAR_INPUT
    bEnable : BOOL;
    NETID   : T_AmsNetId;(* AMS Net ID from Controller *)
    PORT    : T_AmsPort; (* Port used by Controller to communicate with Device *)
END_VAR

bEnable : Activation of the function block

NETID : AMS Net ID of the controller

PORT : Port via which the controller communicates with the device (port = Device ID + 1000hex)

VAR_OUTPUT

VAR_OUTPUT
    bBusy           : BOOL;
    stAlarmDiagData : ST_PN_AlarmDiagData;
    bError          : BOOL;         
    iErrorID        : UDINT;
    iNrAlarms       : INT;
END_VAR

bBusy : When the function block is activated this output is set. It remains set until a feedback is received. While Busy = TRUE, no new command will be accepted at the inputs.

stAlarmDiagData : Diagnosis messages are output via this structure. An alarm is output via the structure in each cycle as long as the status bit [0x0010 = at least one AlarmCR got a diagnosis alarm] is present at the PLC input.

bError : If an error should occur during the transmission of the command, this output is set after the bBusy output has been reset.

iErrorID : Supplies an ADS error number when the output bError is set.

iNrAlarms : Number of alarms last read out.

VAR

VAR
        PnIoBoxDiag AT %I* : WORD; (*Hardware Input*)
END_VAR

PnIoBoxDiag : Hardware input: this variable must be linked to the PROFINET device. A change of state of this variable indicates to the PLC program that there are new diagnosis alarms in the linked PROFINET device.

Requirements

Development environment	Target platform	PLC libraries to be linked
TwinCAT v2.11.0 R3	PC or CX (x86, ARM)	TcProfinetDiag.Lib