Campbell CR510 Manual del operador descargar pdf (Pagina 52)

SECTION 3. INSTRUCTION SET BASICS

3-4

TABLE 3.7-2. Example of the Use of Flag 9

1: If time is (P92)

1: 0 Minutes (Seconds --) into a

2: 10 Interval (same units as above)

3: 10 Set Ouptut Flag High (Flag 0)

2: If (X!F) (P89)

1: 14 X Loc [ Wind_spd ]

2: 4 <

3: 4.5 F

4: 19 Set Intermed. Proc. Disable Flag High (Flag 9)

3: Histogram (P75) ; See Section 11 for details of this intruction.

4: Do (P86) ; Required when additional output processing follows

1: 29 Set Intermed. Proc. Disable Flag Low (Flag 9)

5: Maximum (P73)

1: 1 Reps

2: 00 Time Option

3: 14 Loc [ Wind_spd ]

As an example, suppose it is desired to obtain a

wind speed rose incorporating only wind speeds

greater than or equal to 4.5 m/s. The wind

speed rose is computed using the Histogram

Instruction 75, and wind speed is stored in input

location 14, in m/s. Instruction 89 is placed just

before Instruction 75 and is used to set Flag 9

high if the wind speed is less than 4.5 m/s:

NOTE: Flag 9 is automatically reset the

same as Flag 0. If the intermediate

processing disable flag is already set high

and the test condition of a subsequent

Program Control Instruction acting on Flag

9 fails, the flag is set low. This feature

eliminates having to enter another

instruction to specifically reset Flag 9 low

before proceeding to another group of test

conditions.

3.7.3 USER FLAGS

Flags 1-8 are not dedicated to a specific

purpose and are available to the user for

general programming needs. The user flags

can be manually toggled from the keyboard in

the ∗6 Mode (Section 1.3). By inserting the flag

test (Instruction 91) at appropriate points in the

program, the user can use the ∗6 Mode to

manually direct program execution.

3.8 PROGRAM CONTROL LOGICAL

CONSTRUCTIONS

Most of the Program Control Instructions have a

command code parameter which is used to

specify the action to be taken if the condition

tested in the instruction is true. Table 3.8-1 lists

these codes.

TABLE 3.8-1. Command Codes

0 Go to end of program table

1-9, 79-99 Call Subroutine 1-9, 79-99

10-19 Set Flag 0-9 high

20-29 Set Flag 0-9 low

30 Then Do

31 Exit loop if true

32 Exit loop if false

41 Set Port 1 high

51 Set Port 1 low

61 Toggle Port 1

71 Pulse Port 1

98 is a special subroutine which can be

called by Control port 2 going high; see

Instruction 85 for details (Section 12).

If this command is executed while in a

subroutine, execution jumps directly to the

end of the table that called the subroutine.

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 263 264

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