Pegaia

Hi,

It is difficult to build a HSC example, because, despite it is very simple (90% is just HW configuration), each one needs one specific solution that a general sample doesn't cover.

Despite of it, I think that should be nice to give an initial step with a very simple example.

TIPs:

Device configuration

The HSC configuration is defined on the Device Configuration, CPU properties, High seepd Counters

In our example, HSC1 was enabled, for simple counting:

High speed counter (HSC)1:

1- Checked: “Enable this high speed counter”

2- If you will work with A/B encoders, you need to change the property "Operating phase" from ‘single phase’ to ‘AB quadrature phase 1x’ (or 4x).

3 -The hardware inputs box will show where the field signals should be connected.

TIP: With CPU FW4 and STEP 7 V13 it is necessary to adjust (minimise) the input filter of the digital inputs

OB1:

1 - You can read the count value (as Dint) directly from the address showed HSC configuration (CPU properties) in the "IO address" / start address (e.g. starts with 1000).

2 – The call of the CTRL_HSC is not necessary to read the HSC value, however you could use it for change the HSC configuration in PLC RUN mode (by user program).

Reset:

You can define in HW enable an input for reset function. If you need to do a reset from a user program, you could call CTRL_HSC like showed in the network 2.

CTRL_HSC:

The main tip for CTRL_HSC block is to address the HSC by the symbolic name (not direct by a number): it is easier, clearer to understand, and avoid future problems (if you change for a new hardware and the number of HSC changes).

Retentive:

The HSC are not retentive (i.e. it looses your values after a power off/on). Despite of it, there is possible with help of the user program to reload the last read value to a HSC. The FAQ http://support.automation.siemens.com/BR/view/en/41995947shows how to do it.

 Hi,

At the moment I'm making an application where a little wheel is drived by a dc - motor. When I send out the wheel at maxed velocity (int value 27648) i can't measure the wheel anymore with a normal counter. I'm measuring it by counting the times the inductive sensor gives me a value = true.

I want to try the HSC but i do not know what parameter is the input signal. To be complete: i'm working with a S7-1215 DC/DC/DC CPU and i'm programming in SCL.

I hope u can help me.

Kind regards
Mathijs

Gracias x la informacion, me sirvio (Y)

I cant  open HSC.zip  (example) ??

 please i need it , if you can send me the zip again ??

thanks a lot

fjguzzetti

 Very usefull explanation, as usual Denilson. Thanks

Denilson Pegaia

Hi,

It is difficult to build a HSC example, because, despite it is very simple (90% is just HW configuration), each one needs one specific solution that a general sample doesn't cover.

Despite of it, I think that should be nice to give an initial step with a very simple example.

TIPs:

Device configuration

The HSC configuration is defined on the Device Configuration, CPU properties, High seepd Counters

In our example, HSC1 was enabled, for simple counting:

High speed counter (HSC)1:

1- Checked: “Enable this high speed counter”

2- If you will work with A/B encoders, you need to change the property "Operating phase" from ‘single phase’ to ‘AB quadrature phase 1x’ (or 4x).

3 -The hardware inputs box will show where the field signals should be connected.

TIP: With CPU FW4 and STEP 7 V13 it is necessary to adjust (minimise) the input filter of the digital inputs

OB1:

1 - You can read the count value (as Dint) directly from the address showed HSC configuration (CPU properties) in the "IO address" / start address (e.g. starts with 1000).

2 – The call of the CTRL_HSC is not necessary to read the HSC value, however you could use it for change the HSC configuration in PLC RUN mode (by user program).

Reset:

You can define in HW enable an input for reset function. If you need to do a reset from a user program, you could call CTRL_HSC like showed in the network 2.

CTRL_HSC:

The main tip for CTRL_HSC block is to address the HSC by the symbolic name (not direct by a number): it is easier, clearer to understand, and avoid future problems (if you change for a new hardware and the number of HSC changes).

Retentive:

The HSC are not retentive (i.e. it looses your values after a power off/on). Despite of it, there is possible with help of the user program to reload the last read value to a HSC. The FAQ http://support.automation.siemens.com/BR/view/en/41995947shows how to do it.

Denilson Pegaia

Hi,

It is difficult to build a HSC example, because, despite it is very simple (90% is just HW configuration), each one needs one specific solution that a general sample doesn't cover.

Despite of it, I think that should be nice to give an initial step with a very simple example.

TIPs:

Device configuration

The HSC configuration is defined on the Device Configuration, CPU properties, High seepd Counters

In our example, HSC1 was enabled, for simple counting:

High speed counter (HSC)1:

1- Checked: “Enable this high speed counter”

2- If you will work with A/B encoders, you need to change the property "Operating phase" from ‘single phase’ to ‘AB quadrature phase 1x’ (or 4x).

3 -The hardware inputs box will show where the field signals should be connected.

TIP: With CPU FW4 and STEP 7 V13 it is necessary to adjust (minimise) the input filter of the digital inputs

OB1:

1 - You can read the count value (as Dint) directly from the address showed HSC configuration (CPU properties) in the "IO address" / start address (e.g. starts with 1000).

2 – The call of the CTRL_HSC is not necessary to read the HSC value, however you could use it for change the HSC configuration in PLC RUN mode (by user program).

Reset:

You can define in HW enable an input for reset function. If you need to do a reset from a user program, you could call CTRL_HSC like showed in the network 2.

CTRL_HSC:

The main tip for CTRL_HSC block is to address the HSC by the symbolic name (not direct by a number): it is easier, clearer to understand, and avoid future problems (if you change for a new hardware and the number of HSC changes).

Retentive:

The HSC are not retentive (i.e. it looses your values after a power off/on). Despite of it, there is possible with help of the user program to reload the last read value to a HSC. The FAQ http://support.automation.siemens.com/BR/view/en/41995947shows how to do it.

 Dear Denilson, do you can rewrite this code to open it on Tia Portal V14?