FB_MTP_AnaDrv

The function block FB_MTP_AnaDrv is an object for controlling a drive with variable speed from different sources: internal PLC logic or manual operation (e. g. via OPC UA). Switching requests and value specifications are managed independently of each other via the state machines of Operation Mode and Source 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. With simultaneous requests from Fwd* and Rev*, both are prioritized equally and the drive remains in its state. Stop* is prioritized highest at SafePos = FALSE with simultaneous requests from Fwd*, Rev* and Stop*. 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.

Setpoint specification

The speed is set via Rpm* variables. The speed specification is managed by the state machine Source Mode and is output according to the diagram below:

Safety position

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

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 `SafePosDirRpmEn`, `SafePosDir` and `SafePosRpm` 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 (SafePos = FALSE)

In the de-energized state, the drive is stopped (FwdCtrl = FALSE, RevCtrl = FALSE and Rpm = 0)

Safety position: active state (SafePos = TRUE)

If the state is active, the default direction of rotation and speed can be activated (SafePosDirRpmEn = TRUE) and the direction of rotation (SafePosDir) or speed (SafePosRpm) can be specified.

If SafePosDirRpmEn = FALSE, the current movement state (forward, reverse or stop) is the safety position.

If the default setting (SafePosDirRpmEn = TRUE) is activated, the safety position is forward (SafePosDir = FALSE) or reverse (SafePosDir = TRUE) with the defined safety speed (SafePosRpm).

The following table shows the operating options for the drive (Fwd*, Rev*, Stop* and Rpm*) when Permit is active, depending on the initial state of the drive (stop drive, set drive to forward movement and set drive to reverse movement) and the defined safety position:

SafePos	SafePos DirRpmEn	SafePosDir	Drive set to Stop	Drive set to Forward	Drive set to Reverse
`FALSE`	-	-	`SafePosAct = TRUE` `Rev` + `Fwd`: x `Rpm*`: x	`SafePosAct = FALSE` `Rev` + `Stop`: ✓ `Rpm*`: ✓	`SafePosAct = FALSE` `Fwd` + `Stop`: ✓ `Rpm*`: ✓
`TRUE`	`FALSE`	-	`SafePosAct = TRUE` `Rev` + `Fwd`: x `Rpm*`: x	`SafePosAct = TRUE` `Rev` + `Stop`: x `Rpm*`: x	`SafePosAct = TRUE` `Fwd` + `Stop`: x `Rpm*`: x
`TRUE`	`TRUE`	`FALSE` `(Fwd)`	`SafePosAct = FALSE` `Rev` + `Fwd`: ✓ `Rpm*`: ✓	`SafePosAct = TRUE` `Rev` + `Stop`: x `Rpm*`: x (`SafePosRpm`)	`SafePosAct = FALSE` `Fwd` + `Stop`: ✓ `Rpm*`: ✓
`TRUE`	`TRUE`	`TRUE` `(Rev)`	`SafePosAct = FALSE` `Rev` + `Fwd`: ✓ `Rpm*`: ✓	`SafePosAct = FALSE` `Rev` + `Stop`: ✓ `Rpm*`: ✓	`SafePosAct = TRUE` `Fwd` + `Stop`: x `Rpm*`: x (`SafePosRpm`)

SafePos

SafePos
DirRpmEn

SafePosDir

Drive set to

Stop

Drive set to

Forward

Drive set to

Reverse

FALSE

SafePosAct = TRUE

Rev* + Fwd*: x

Rpm*: x

SafePosAct = FALSE

Rev* + Stop*: ✓

Rpm*: ✓

SafePosAct = FALSE

Fwd* + Stop*: ✓

Rpm*: ✓

TRUE

FALSE

SafePosAct = TRUE

Rev* + Fwd*: x

Rpm*: x

SafePosAct = TRUE

Rev* + Stop*: x

Rpm*: x

SafePosAct = TRUE

Fwd* + Stop*: x

Rpm*: x

TRUE

FALSE

(Fwd)

SafePosAct = FALSE

Rev* + Fwd*: ✓

Rpm*: ✓

SafePosAct = TRUE

Rev* + Stop*: x

Rpm*: x (SafePosRpm)

SafePosAct = FALSE

Fwd* + Stop*: ✓

Rpm*: ✓

TRUE

(Rev)

SafePosAct = FALSE

Rev* + Fwd*: ✓

Rpm*: ✓

SafePosAct = FALSE

Rev* + Stop*: ✓

Rpm*: ✓

SafePosAct = TRUE

Fwd* + Stop*: x

Rpm*: x (SafePosRpm)

x: Switching requests and/or value specifications are no longer taken into account

✓: Switching requests and/or value specifications are taken into account

Further characteristics

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
Src*		See Source Mode
RpmInt	REAL	`Internal` Speed setpoint specification	Read
RpmUnit	INT	Speed Unit	Read
RpmMin	REAL	Upper limit of the speed setpoint	Read
RpmMax	REAL	Lower limit of the speed setpoint	Read
RpmFbkCalc	BOOL	Source of the actual speed value: 1: Calculated 0: Sensor	Read
RpmFbk	REAL	Actual speed value	Read
RpmSclMin	REAL	Speed scale start	Read
RpmSclMax	REAL	Speed scale end	Read
Perm* Int* Prot*		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
SafePosDirRpmEn	BOOL	1: Rotation direction specification for `SafePos` `= TRUE` via the variable `SafePosDir` 0: No rotation direction specified	–
SafePosDir	BOOL	Rotation direction specification for `SafePos = TRUE` and `SafePosDirRpmEn = TRUE` 1: reverse 0: forward	–
SafePosRpm	REAL	Speed specification for safety position, if `SafePos` `= TRUE` and `SafePosDirRpmEn` `= TRUE`	–
ResetAut	BOOL	`Automatic` reset switching request: 1: Reset requested. 0: No reset requested.	Read

Outputs

Name	Type	Description	OPC UA access
State*		See Operation Mode
FwdCtrl	BOOL	Forward movement: 1: active 0: inactive	Read
RevCtrl	BOOL	Reverse movement: 1: active 0: inactive	Read
Src*		See Source Mode
Rpm	REAL	Speed setpoint on drive	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
State*		See Operation Mode
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 movement: (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 movement: (Relevant if `StateOpAct` & `RevEn`) 1: Execute reverse movement. 0: Do not execute any reverse movement.	Read/write
Src*		See Source Mode
RpmMan	REAL	`Manual` setpoint specification for the speed	Read/write
RpmRbk	REAL	Unprocessed value of the `Operator` speed value specification	Read
ResetOp	BOOL	`Operator` reset switching request: 0→1: `Operator` request 1→0: Request has been processed.	Read/write

Methods

Name	Description
SetOffline SetOperator SetAutomatic	See Operation Mode
SetInternal SetManual	See Source Mode

Name

Description

SetOffline

SetOperator

SetAutomatic

See Operation Mode

SetInternal

SetManual

See Source Mode