MC_GearIn

MC_GearIn 1:

The function block MC_GearIn activates a linear master-slave coupling (gear coupling). The block accepts a fixed gear ratio in numerator/denominator format.

The slave axis can be coupled to the master axis when stationary. This block cannot be used for synchronization while the master axis is in motion. In this case the Flying Saw block MC_GearInVelo or MC_GearInPos can be used.

The slave axis can be uncoupled with the function block MC_GearOut. If the slave is decoupled while it is moving, then it retains its velocity and can be halted using MC_Stop or MC_Halt.

Alternatively, the block MC_GearInDyn with dynamically variable gear ratio is available.

Inputs


VAR_INPUT
    Execute         : BOOL;
    RatioNumerator : LREAL;
    RatioDenominator    : UINT;
    Acceleration : LREAL;
    Deceleration : LREAL;
    Jerk     : LREAL;
    BufferMode : MC_BufferMode; 
    Options         : ST_GearInOptions;
END_VAR

MC_BufferMode

Execute	The command is executed with a rising edge at input Execute.
RatioNumerator	Gear ratio numerator. Alternatively, the gear ratio can be specified in the numerator as a floating point value, if the denominator is 1.
RatioDenominator	Gear ratio denominator
Acceleration	Acceleration (≥0). (currently not implemented)
Deceleration	Deceleration (≥0). (currently not implemented)
Jerk	Jerk (≥0). (currently not implemented)
BufferMode	Currently not implemented
Options	Currently not implemented

For a 1:4 ratio the RatioNumerator must be 1, the RatioDenominator must be 4. Alternatively, the RatioDenominator may be 1, and the gear ratio can be specified as floating-point number 0.25 under RatioNumerator. The RatioNumerator may be negative.

Outputs


VAR_OUTPUT
    InGear     : BOOL;
    Busy     : BOOL; 
    Active     : BOOL; 
    CommandAborted : BOOL;
    Error     : BOOL;
    ErrorID         : UDINT;
END_VAR

InGear	Becomes TRUE, if the coupling was successful.
Busy	The Busy output becomes TRUE when the command is started with Execute and remains TRUE as long as the command is processed. If Busy becomes FALSE again, the function block is ready for a new job. At the same time one of the outputs InGear, CommandAborted or Error is set.
Active	Active indicates that the command is executed (currently Active=Busy, see BufferMode)
CommandAborted	Becomes TRUE, if the command could not be fully executed. The axis may have become decoupled during the coupling process (simultaneous command execution).
Error	Becomes TRUE if an error occurs.
ErrorID	If the error output is set, this parameter supplies the error number.

Inputs/outputs


VAR_IN_OUT
    Master : AXIS_REF;
    Slave : AXIS_REF;
END_VAR

AXIS_REF AXIS_REF

Master	Master axis data structure.
Slave	Axis data structure of the Slave.

The axis data structure of type AXIS_REF addresses an axis uniquely within the system. Among other parameters it contains the current axis status, including position, velocity or error status.