Description

Description of the Function

These DFBs are used to monitor, command, and carry out diagnostics of an operating part element, i.e. any device that acts directly on manufactured items and the environment.

These DFBs, defined by a "pre-actuator-actuator/sensor", maintain positioning between two points of reference (whether monitored or not), for linear or rotating movement carried out at a constant speed.

Areas of use

commanding jacks (monostable, bistable or middle-point distributers),
commanding certain positioning motors,
binding, unit, machining, and turntable command.

Difference between the two DFBs

The TEPO_DIA DFB is identical to the NEPO_DIA DFB. Its sole limitation is that it can only manage linear movement (i.e. not rotating). As a result, the ROTATION and ONEWAY public variables do not exist for this DFB.

Additional parameters and can be configured.

NOTE: This diagnostic DFB cannot be used in a user DFB.

Representation in FBD

Representation:

Representation in LD

Representation:

Representation in IL

Representation:

CAL NEPO_1 (ED := Enable_Control, INIT := Init_Input, REQ_I := Req_I_Input, REQ_O := Req_O_Input, SENSOR_I := Sensor_I_Input, SENSOR_O := Sensor_O_Input, SECU_I := Secu_I_Input, SECU_O := Secu_O_Input, SECUPERM := Secuperm_Input, ERROR => Error_Output, STATUS0 => Status0_Output, STATUS1 => Status1_Output, READY => Ready_Output, ORDER_I => Order_I_Output, ORDER_O => Order_O_Output, STATE_I => State_I_Output, STATE_O => State_O_Output, POSSIB_I => Possib_I_Output, POSSIB_O => Possib_O_Output, FAULT_I => Fault_I_Output, FAULT_O => Fault_O_Output, INC_I => Inc_I_Output, INC_O => Inc_O_Output,)

Representation in ST

Representation:

NEPO_1 (ED := Enable_Control, INIT := Init_Input, REQ_I := Req_I_Input, REQ_O := Req_O_Input, SENSOR_I := Sensor_I_Input, SENSOR_O := Sensor_O_Input, SECU_I := Secu_I_Input, SECU_O := Secu_O_Input, SECUPERM := Secuperm_Input, ERROR => Error_Output, STATUS0 => Status0_Output, STATUS1 => Status1_Output, READY => Ready_Output, ORDER_I => Order_I_Output, ORDER_O => Order_O_Output, STATE_I => State_I_Output, STATE_O => State_O_Output, POSSIB_I => Possib_I_Output, POSSIB_O => Possib_O_Output, FAULT_I => Fault_I_Output, FAULT_O => Fault_O_Output, INC_I => Inc_I_Output, INC_O => Inc_O_Output,);

Description of Parameters

The following table describes the input parameters:

Parameter	Type	Description
ED	EBOOL	DFB activation bit When ED = 0, the DFB is not executed. The default value is 0.
INIT	EBOOL	Fault acknowledgement bit When on 1, this bit acknowledges the faults indicated by the ERROR bit and the STATUS0 word. It is reset to 0 by the DFB. The default value is 0.
REQ_I, REQ_Q	EBOOL	Request bits These bits are set on 1 by the command part to request an "input" and "output" movement respectively. The default value is 0.
SENSOR_I, SENSOR_O	EBOOL	Information input bits These inputs receive position information from all the "input" and "output" position sensors respectively. The default value is 0.
SECU_I, SECU_O	EBOOL	Safety condition These inputs are used to link up the safety conditions of "input" and "output" movements respectively. The default value is 0.
SECUPERM	EBOOL	Operating conditions. This input is used to link up continuous operating conditions. The default value is 0.

The following table describes the output parameters:

Parameter	Type	Description
ERROR	EBOOL	Fault bit This bit is set on 1 as soon as a fault appears and providing that the fault has not been masked (see: Selection mask for public variables ) The default value is 0.
STATUS0 STATUS1	INT	Fault type These two words indicate the type of fault. STATUS0 indicates faults linked to DFB operation. STATUS1 is kept for configuration faults. (see:Description of NEPO_DIA and TEPO_DIA DFB status words) The default value is 0.
READY	EBOOL	DFB availability when on 1, the DFB is in command mode (setting orders). when on 0, the DFB is in recalibration mode (awaiting reference point). The default value is 0.
ORDER_I, ORDER_O	EBOOL	Activation indicator When on 1, these bits indicate that the "input" and "output" commands have been activated respectively. The default value is 0.
STATE_I, STATE_O	EBOOL	Input position When on 1, these bits indicate that the "input" and "output" commands are being checked. The default value is 0.
POSSIB_I, POSSIB_O	EBOOL	Availability indicator These bits indicate that the DFB is ready to accept "input" and "output" movement requests respectively. The default value is 0.
FAULT_I, FAULT_O	EBOOL	Fault bit These bits indicate a constant fault during "input" and "output" movements (inoperative position) respectively. The default value is 0.
INC_I, INC_O	EBOOL	Fault bit In the absence of an order or request, these bits indicate an incoherence respectively: between the "input" state awaited by the automatic process ( RESEQ_1 or ORIGIN data) and the position recorded by the DFB. between the "output" state awaited by the automatic process ( RESEQ_O data) and the position recorded by the DFB. The default value is 0.