88 if x compared to y, 89 if x compared to f – Campbell Scientific CR10X Measurement and Control System User Manual
Page 186
SECTION 12. PROGRAM CONTROL INSTRUCTIONS
12-4
The Loop with a delay may be used so that only
those instructions within the Loop are executed
while certain conditions are met. As a simple
example, suppose it is desired to execute one
set of instructions from midnight until 6 AM,
another set between 6 AM and 4 PM, and a
third set between 4 PM and midnight. Between
6 AM and 4 PM, samples are desired every 10
seconds; the rest of the time one minute
between samples is sufficient. The execution
interval is set to 10 seconds; when a one minute
sample rate is desired, a delay of 6 (6 x 10s =
60s) is used in the loop.
TABLE 12-4. Example: Loop with Delay
*
1
Table 1 Programs
01:
10
Sec. Execution Interval
01:
P87
Beginning of Loop
01:
6
Delay
02:
0
Loop Count
11:
P86
Do
01:
1
Call Subroutine 1
12:
P89
If X<=>F
01:
25
X Loc DAY
02:
3
>=
03:
6
F
04:
31
Exit Loop if true
13:
P95
End
14:
P87
Beginning of Loop
01:
1
Delay
02:
0
Loop Count
27:
P86
Do
01:
1
Call Subroutine 1
28:
P89
If X<=>F
01:
25
X Loc DAY
02:
3
>=
03:
16
F
04:
31
Exit Loop if true
29:
P95
End
30:
P87
Beginning of Loop
01:
6
Delay
02:
0
Loop Count
36:
P86
Do
01:
1
Call Subroutine 1
37:
P89
If X<=>F
01:
25
X Loc DAY
02:
3
>=
03:
5
F
04:
32
Exit Loop if false
38:
P95
End
39:
P
End Table 1
*
3
Table 3 Subroutines
01:
P85
Beginning of Subroutine
01:
1
Subroutine Number
02:
P18
Time
01:
2
Hours into current year
(maximum 8784)
02:
24
Mod/by
03:
25
Loc [:DAY ]
03:
P95
End
*** 88 IF X COMPARED TO Y ***
FUNCTION
This Instruction compares two input locations
and, if the result is true, executes the specified
Command. The comparison codes are given in
Table 12-5.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
01:
4
Input location for X
02:
2
Comparison code
(Table 12-5)
03:
4
Input location for Y
04:
2
Command (Table 12-2)
TABLE 12-5. Comparison Codes
Parameter 1
Function
1
IF X = Y
2
IF X
≠Y
3
IF X
≥ Y
4
IF X < Y
*** 89 IF X COMPARED TO F ***
FUNCTION
This Instruction compares an input location to a
fixed value and, if the result is true, performs
the specified Command. The comparison codes
are given in Table 12-5.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
01:
4
Input location for X
02:
2
Comparison code
(Table 12-5)
03:
FP
Fixed value
04:
2
Command (Table 12-2)