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SECTION 3. INSTRUCTION SET BASICS
1: If time is (P92)
1:
0
2:
10
3:
10
2: If (X!F) (P89)
1:
14
2:
4
3:
4.5
4:
19
3: Histogram (P75) ; See Section 11 for details of this intruction.
4: Do (P86) ; Required when additional output processing follows
1: 29
5: Maximum (P73)
1:
1
2:
00
3:
14
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.
3-4
TABLE 3.7-2. Example of the Use of Flag 9
Minutes (Seconds --) into a
Interval (same units as above)
Set Ouptut Flag High (Flag 0)
X Loc [ Wind_spd ]
<
F
Set Intermed. Proc. Disable Flag High (Flag 9)
Set Intermed. Proc. Disable Flag Low (Flag 9)
Reps
Time Option
Loc [ Wind_spd ]
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
1
98 is a special subroutine which can be
called by Control port 2 going high; see
Instruction 85 for details (Section 12).
2
If this command is executed while in a
subroutine, execution jumps directly to the
end of the table that called the subroutine.
2
1
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