Rockwell-automation 57C409 2 Channel Analog Input Module Instrukcja Użytkownika Pobierz pdf (Strona 24)

4Ć8

4.4.2 Control Block Task Example

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

interrupts from channel 1 of the input module.

1000 !

1001 ! common data declarations

1003 !

1004 COMMON ANALOG

INPUT 1% \!Data from channel 1

1005 COMMON ISCR

CHANNEL 1% \!Interrupt status & control 1

1010 COMMON CCLK

ENABLE 0@ \!Common clock enable 0

1015 COMMON CCLK

ENABLE 1@ \!Common clock enable 1

1020 COMMON UPDATE

TIME 1% \!Update period for channel 1

1025 COMMON INPUT

1 FILTER% \!Input filter for channel 1

1200 !

1300 ! local data declarations

1400 !

1401 LOCAL LOOP

GAIN% \!Gain of amplifier

1402 LOCAL OFFSET% \!Amplifier offset

1403 LOCAL NORM

ANALOG IN% \!Analog value

1500 !

2000 !

2001 ! set up the conversion parameters

2002 !

2010 UPDATE

TIME 1% = 100 \!Convert every 50 milliĆseconds

2011 INPUT

1 FILTER% = 2 \!79 rad/sec filter

3000 !

3001 ! The following statement connects the name CHANNEL

1 EVENT

3002 ! to the interrupt defined in ISCR

CHANNEL 1%. The event name

3003 ! should be as meaningful as possible. The watchdog timeout has

3004 ! been set to 12 clock ticks (66 msec). If the time between

3005 ! interrupts exceeds this value, a bus error will

3006 ! be indicated on the processor's LED and the system

3007 ! will be stopped. For more information refer to the

3008 ! Enhanced BASIC Language Instruction Manual (JĆ3675).

3009 !

3010 EVENT NAME=CHANNEL

1 EVENT, &

INTERRUPT

STATUS=ISCR CHANNEL 1%, TIMEOUT=12

4000 !

4001 ! The following statements enable common clock" on this module

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

4003 ! task that enables common clock" should always be the lowest

4004 ! priority task.

4005 !

4010 CCLK

ENABLE 0@ = TRUE \!Turn on the clock

4020 CCLK

ENABLE 1@ = TRUE \!Must turn on both outputs

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 waiting to execute at the time of the interrupt, it

6005 ! will become active. If it is not the highest priority task, it

6006 ! will remain suspended until all higher priority tasks have

6007 ! executed, at which point it will become active.

6008 !

6010 CALL SCAN

LOOP( TICKS=9, EVENT=CHANNEL 1 EVENT)

7000 !

7001 !

7002 ! The next statements perform the interrupt service routine

7010 CALL AMPLIFIER( INPUT1=ANALOG

INPUT 1%, &

GAIN1=LOOP

GAIN%, INPUT2= OFFSET%, LOOP GAIN%, &

OUTPUT=NORM

ANALOG IN%)

10000 END

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 43 44

Komentarze do niniejszej Instrukcji

Brak uwag

Rockwell-automation 57C409 2 Channel Analog Input Module Instrukcja Użytkownika Strona 24

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Ekwipunek Rockwell-automation 57C409 2 Channel Analog Input Module