Rockwell-automation 57C411 Resolver Input Module Instrukcja Użytkownika Pobierz pdf (Strona 28)

4Ć10

4000 !

4001 ! The following statement enables common clock from this module.

4002 ! If there is more than one interrupt task in a chassis, the task

4003 ! that enables common clock should always be the lowest priority

4004 ! task.

4005 !

4010 CCLK_EN@ = TRUE \!Common clock enable

5000 !

5001 ! Place additional initialization software here

5002 !

6000 !

6001 ! The next statement synchronizes the task with the external

6002 ! event via the interrupt. Task execution will be suspended

6003 ! until the interrupt occurs. If this task is the highest

6004 ! priority task waiting to execute at the time of the

6005 ! interrupt, it will become active. If it is not the

6006 ! highest priority task, it will remain suspended until

6007 ! all higher priority tasks have executed, at which point

6008 ! it will become active.

6009 !

6010 CALL SCAN_LOOP(TICKS=9, EVENT=RESOLVER_EVENT)

7000 !

7001 ! The next statements perform the interrupt service routine

7002 !

7010 CALL PULSE_MULT(INPUT= RESOLVER_IN%, MULTIPLIER=16385, &

OUTPUT= RESOLVER_VALUE%)

10000 END

4.6 Using the External Strobe Input

At the time of the external event, the resolver position is transferred to

application software is reading the resolver position at a periodic rate

(register 0), the difference between register 0 and register 1

represents the amount of travel from the time that the event occurred

until the current scan of the application software. A typical application

would be detecting the leading edge of an object moving on a

conveyor.

The data captured by the strobe input will be as accurate as the

external device driving the input. Note that when a strobe input has

occurred, you must reset the input so that another one can occur.

This is accomplished by writing a 1" to bit 12 of register 3.

The following is an example of a control block task that handles the

strobe input from the input module defined in section 4.4.

1000 COMMON RESOLVER_IN% \!Resolver data

1001 COMMON RESOLVER_IN_EXT% \!Strobe resolver data

1005 COMMON ISCR% \!Interrupt statusă& control

1010 COMMON CCLK_EN@ \!Common clock enable

1020 COMMON UPDATE_TIME% \!Resolver conversion time

1030 COMMON STROBE_STATUS@ \!Strobe status

1040 COMMON STROBE_ACK@ \!Strobe acknowledge

1200 LOCAL RESOLVER_VALUE% \!Resolver value

1210 LOCAL STROBE_RESET@ \!Strobe state

1220 LOCAL PERIOD_DISTANCE% \!Resolver travel scan/scan

1230 LOCAL EVENT_DISTANCE% \!Resolver travel from event to scan

2000 !

2001 ! Define the conversion parameters

2002 !

2010 UPDATE_TIME% = 100 \!Convert every 50 milliseconds

3010 EVENT NAME=RESOLVER_EVENT,INTERRUPT_STATUS=ISCR%, &

ąąTIMEOUT=12

4010 CCLK_EN@ = TRUE \!Common clock enable

6008 !

6010 CALL SCAN_LOOP( TICKS=9, EVENT=RESOLVER_EVENT)

7000 !

7001 ! The next statements catch the occurence

7002 ! of the strobe and reset it.

7003 !

7010 CALL TRANSITION ( INPUT= STROBE_STATUS @, &

OUTPUT=STROBE_RESET@)

7020 STROBE_ACK@= NOT STROBE_RESET@

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 45 46

Komentarze do niniejszej Instrukcji

Brak uwag

Rockwell-automation 57C411 Resolver Input Module Instrukcja Użytkownika Strona 28

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Ekwipunek Rockwell-automation 57C411 Resolver Input Module