HSCMain: HSC Main Function Block

Function Block Description

This function block controls a Main type counter with the following functions:

oup/down counting

ofrequency meter

oadditional external I/O

othresholds

oevents

operiod meter

odual phase

The HSC Main function block is mandatory when using Main counter.

The function block instance name must match the name defined by configuration. Hardware related information managed by this function block is synchronized with the MAST task cycle.

WARNING

UNINTENDED OUTPUT VALUES

oOnly use the Function Block instance in the MAST task.

oDo not use the same Function Block instance in a different task.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

NOTE: Forcing the logical output values of the FB is allowed by EcoStruxure Machine Expert but it will have no impact on hardware related outputs if the function is active (executing).

Graphical Representation

IL and ST Representation

To see the general representation in IL or ST language, refer to Function and Function Block Representation.

I/O Variables Description

This table describes the input variables:

Input	Type	Description
EN_Enable	BOOL	TRUE = authorizes enabling of the counter using the Enable input (if configured in One shot, Modulo loop modes).
EN_Sync	BOOL	TRUE = authorizes counter synchronization and start using the Sync input.
EN_Cap	BOOL	TRUE = enables the Capture input (if configured in One shot, Modulo loop, Free large modes).
EN_Compare	BOOL	TRUE = enables the comparator operation (using Thresholds 0, 1): obasic comparison (TH0, TH1 output bits) oreflex (Reflex0, Reflex1 output bits) oevents (to trigger external tasks on threshold crossing)
EN_Out0	BOOL	TRUE = enables Output0 to echo the Reflex0 value (if configured in One shot, Modulo loop, Free large modes).
EN_Out1	BOOL	TRUE = enables Output1 to echo the Reflex1 value (if configured in One shot, Modulo loop, Free large modes).
F_Enable	BOOL	TRUE = authorizes changes to the current counter value.
F_Sync	BOOL	On rising edge, authorizes counting function synchronization and start in the following counting modes: One-shot counter: to preset and start the counter Modulo loop counter: to reset and start the counter Free large counter: to preset and start the counter Event counter: to restart the internal time base at the beginning Frequency meter: to restart the internal timer relative to the time base.
F_Out0	BOOL	TRUE = forces Output0 to 1 (if configured in One-shot, Modulo loop, Free large modes).
F_Out1	BOOL	TRUE = forces Output1 to TRUE (if configured in One-shot, Modulo loop, Free large modes).
ACK_Modulo	BOOL	On rising edge, resets Modulo_Flag (Modulo loop and Free large modes).
ACK_Sync	BOOL	On rising edge, resets Sync_Flag.
ACK_Cap	BOOL	On rising edge, resets the Cap_Flag (One-shot, Modulo loop, Free large modes).
SuspendCompare	BOOL	TRUE = compare results are suspended: oPhysical Outputs Output0 and Output1 maintain their last value. oCompare events are masked. NOTE: EN_Compare, EN_Out0,EN_Out1,F_Out0,F_Out1 remain operational while SuspendCompare is set.

This table describes the output variables:

Outputs	Type	Comment
HSC_REF	HSC_REF	Reference to the HSC.
Validity	BOOL	TRUE = indicates that output values on the function block are valid.
HSC_Err	BOOL	TRUE = indicates that an error was detected. Use the HSCGetDiag function block to get more information about this detected error.
Error	BOOL	TRUE = indicates that an error was detected. Use the HSCGetDiag function block to get more information about this detected error.
CurrentValue	DINT	Current count value of the counter.
Run	BOOL	TRUE = counter is running. In One-shot mode, the Run bit switches to 0 when CurrentValue reaches 0.
TH0	BOOL	TRUE = current counter value > Threshold 0 (if configured in One shot, Modulo loop, Free large modes). Only active when EN_Compare is set.
TH1	BOOL	TRUE = current counter value > Threshold 1 (if configured in One shot, Modulo loop, Free large modes). Only active when EN_Compare is set.
Modulo_Flag	BOOL	Set to TRUE when the counter rolls over its limits in the following modes: oModulo loop counter: when the counter rolls over to the modulo or 0 oFree large counter: when the counter roll overs its limits
Sync_Flag	BOOL	Set to TRUE by the synchronization of: oOne-shot counter: when the counter presets and starts oModulo loop counter: when the counter resets oFree large counter: when the counter presets oEvent counter: when the internal timer relative to the time base restarts oFrequency meter: when the internal timer relative to the time base restarts
Cap_Flag	BOOL	TRUE = indicates that a value has been latched in the capture register. This flag must be reset before a new capture can occur.
Reflex0	BOOL	State of Reflex0 (if configured in One shot, Modulo loop, Free large modes). Only active when EN_Compare is set.
Reflex1	BOOL	State of Reflex1 (if configured in One shot, Modulo loop, Free large modes). Only active when EN_Compare is set.
Out0	BOOL	Indicates the state of Output0.
Out1	BOOL	Indicates the state of Output1.