FB_MTP_BinDrv

The function block FB_MTP_BinDrv is an object for controlling a binary drive from different sources: internal PLC logic or manual operation (e.g. via OPC UA). Switching requests are managed via the state machine of Operation Mode. The OPC UA access rights are described in the variable tables.

Controlling the drive

The direction of rotation of the drive is specified via the switching requests Fwd*, Rev*, and Stop*. The state machine of the Operation Mode manages whether and from which source new switching requests are processed.

If both requests are made simultaneously, the safety position is taken into account: Stop* has the highest priority over SafePos = FALSE, and the drive is stopped. If SafePos = TRUE, the switching requests Fwd*, Rev*, and Stop* are prioritized equally and the drive remains in its current state in the event of simultaneous requests.

When Locking is active, it is no longer possible to control the drive, depending on the type of interlock.

The variable Trip indicates the current state of the motor protection. If Trip = FALSE is true, this means that the motor protection has been triggered and the drive is stopped immediately by setting the variables FwdCtrl and RevCtrl to FALSE.

If Trip = TRUE is true, the motor protection is in a fault-free state. Once the motor protection has been restored after triggering (Trip = TRUE), the state must be acknowledged via Reset before operation can resume.

Safety position

The safety position is defined via the variables SafePos, SafePosDirEn, and SafePosDir.

The variable SafePos is used to specify whether the safety position of the drive is the de-energized state or an active state.

	The variables `SafePosDirEn` and `SafePosDir` are not part of the MTP guideline. They have also been implemented and can be used to define a safety position in the active state. These variables are not listed in the MTP file and are not made available via OPC UA.

Safety position: de-energized state

In the de-energized state, the safety position of the drive is: FwdCtrl = FALSE and RevCtrl = FALSE.

Safety position: active state

For the active state, the default direction of rotation can be enabled (SafePosDirEn = TRUE) and the direction of rotation can be specified (SafePosDir).

If the specification of the direction of rotation is disabled SafePosDirEn = FALSE, the current movement state (forward, reverse, or stop) is the safety position.

If the default setting is enabled, the safety position SafePosDirEn = TRUE is forward (SafePosDir = FALSE) or reverse (SafePosDir = TRUE).

General definitions

Implemented interfaces

I_MTP_BinDrv

Inputs

Name	Type	Description	OPC UA access
TagName	STRING	Name of the interface	-
TagDescription	STRING	Description of the interface	-
WQC	BYTE	Worst Quality Code	Read
OSLevel	BYTE	Level must be defined for system. Value 0 is reserved for local operation.	Read/write
StateChannel StateOffAut StateOpAut StateAutAut		See Operation Mode
FwdEn	BOOL	Enable forward movement: 1: Enabled 0: Disabled	Read
RevEn	BOOL	Enable reverse movement: 1: Enabled 0: Disabled	Read
StopAut	BOOL	`Automatic` switching request to set the drive to stop: (Relevant if `StateAutAct`) 1: Execute stop. 0: No stop	Read
FwdAut	BOOL	`Automatic` switching request to set the drive in forward motion: (Relevant if `StateAutAct` & `FwdEn`) 1: Execute forward movement. 0: Do not execute any forward movement.	Read
RevAut	BOOL	`Automatic` switching request to set the drive in forward motion: (Relevant if `StateAutAct` & `RevEn`) 1: Execute reverse movement. 0: Do not execute any reverse movement.	Read
FwdFbk	BOOL	Feedback signal for forward movement: 1: Forward movement 0: No forward movement	Read
FwdFbkCaIc	BOOL	Source of the forward movement feedback signal: 1: Calculated 0: Sensor	Read
RevFbk	BOOL	Feedback signal for reverse movement: 1: Reverse movement 0: No reverse movement	Read
RevFbkCaIc	BOOL	Source of the feedback signal for reverse motion: 1: Calculated 0: Sensor	Read
PermEn Permit IntlEn Interlock ProtEn Protect		See Locking
Trip	BOOL	Signaling contact for motor protection: 1: No error 0: Motor protection tripped.	Read
SafePos	BOOL	1: Retain current state. 0: Stop	Read
SafePosDirEn	BOOL	1: Direction of rotation specification for `SafePos` `= TRUE` via variable `SafePosDir` 0: No direction of rotation specified	-
SafePosDir	BOOL	Direction of rotation specification for `SafePos` `= TRUE` and `SafePosDirRpmEn = TRUE` 1: Reverse 0: Forward	-
ResetAut	BOOL	`Automatic` reset switching request: 1: Reset requested. 0: No reset requested.	Read

Outputs

Name	Type	Description	OPC UA access
FwdCtrl	BOOL	Forward movement: 1: Active 0: Inactive	Read
RevCtrl	BOOL	Reverse movement: 1: Active 0: Inactive	Read
SafePosAct	BOOL	Safety position enabled: 1: Safety position is active. 0: Safety position is not active.	Read

Name

Type

Description

OPC UA access

FwdCtrl

BOOL

Forward movement:

1: Active

0: Inactive

Read

RevCtrl

BOOL

Reverse movement:

1: Active

0: Inactive

Read

SafePosAct

BOOL

Safety position enabled:

1: Safety position is active.

0: Safety position is not active.

Read

External variables

Name	Type	Description	OPC UA access
StopOp	BOOL	`Operator` switching request to set the drive to stop: (Relevant if `StateOpAct`) 1: Execute stop. 0: Do not execute a stop.	Read/write
FwdOp	BOOL	`Operator` switching request to set the drive in forward motion: (Relevant if `StateOpAct` & `FwdEn`) 1: Execute forward movement. 0: Do not execute any forward movement.	Read/write
RevOp	BOOL	`Operator` switching request to set the drive in forward motion: (Relevant if `StateOpAct` & `RevEn`) 1: Execute reverse movement. 0: Do not execute any reverse movement.	Read/write
ResetOp	BOOL	`Operator` reset switching request: 0→1: `Operator` request 1→0: Request has been processed.	Read/write

Methods

Name	Type	Description
IsOffline IsOperator IsAutomatic SetOffline SetOperator SetAutomatic		See Operation Mode
Forward	BOOL	The `Forward` method allows the drive to start moving forward. In this process, the `OperationMode` is transformed into the state `SetAutomatic` using the method `Automatic`. The `Aut` switching requests are set to defined values, and the internal logic is invoked. Finally, the `*Aut` switching requests are reset to `FAlSE`. Returns `TRUE` if `FwdFbk = TRUE` and `RevFbk = FALSE`.
Reverse	BOOL	The `Reverse` method allows the drive to start moving in reverse. In this process, the `OperationMode` is transformed into the state `SetAutomatic` using the method `Automatic`. The `Aut` switching requests are set to defined values, and the internal logic is invoked. Finally, the `*Aut` switching requests are reset to `FALSE`. Returns `TRUE` if `FwdFbk = FALSE` and `RevFbk = TRUE`.
Stop	BOOL	The `Stop` method allows you to stop the drive. In this process, the `OperationMode` is transformed into the state `SetAutomatic` using the method `Automatic`. The `Aut` switching requests are set to defined values, and the internal logic is invoked. Finally, the `Aut` switching requests are reset to `False`. Returns `TRUE` if `FwdFbk = FALSE` and `RevFbk = FALSE`.