Measurement and Control Module Operators Manual
SECTION 12. PROGRAM CONTROL INSTRUCTIONS
12-5
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 3.8-1)
TABLE 12-5. Comparison Codes
Parameter 1 Function
1IF X = Y
2IF X ≠Y
3IF X ≥ Y
4IF 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 3.8-1)
*** 90 STEP LOOP INDEX ***
FUNCTION
When used within a Loop (Instruction 87),
Instruction 90 will increment the index counter
by a specified amount after the first time
through the loop, thus affecting all indexed
input location parameters in subsequent
instructions. For example, if 4 is specified, the
index counter will count up by 4 (0,4,8,12,...)
inside the loop. Instruction 90 does not affect
the loop counter which still counts by 1.