User Manual Owner's manual

Scan Theory
Chapter 8
8-4
Add the execution values for each instruction by using Table 8.A. The
sum of these values added to the I/O scan time is the average scan time.
Table 8.A
These Are the Approximate Execution T ime Per Scan (in average
microseconds) and Words Per Scan for Each Instruction
Instruction
Instruction Name Symbol True
average
µ sec.
False average
µ sec.
Words Per
Instruction
These instructions are features of the MiniPLC2/02, MiniPLC2/16, and MiniPLC2/17
Examine On
Examine Off
Output Energize
Output Latch
Output Unlatch
-[ ]-
-[ / ]-
-( )-
-(L)-
-(U)-
7
5
8
7
7
10
10
10
10
10
6
5
8
6
6
10
10
10
10
10
1
1
1
1
1
1
1
1
1
1
Get
Put
Equal
Less Than
Get Byte
Limit Test
-[G]-
-(PUT)-
-(=)-
-(<)-
-]B[-
-]L[-
15
12
12
14
11
13
10
10
10
10
10
10
-
7
13
13
-
14
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
Counter Reset
Retentive Timer Reset
Timer OnDelay
Retentive Timer OnDelay
Timer OffDelay
Up Counter
Down Counter
-(CTR)-
-(RTR)-
-(TON)-
-(RTO)-
-(CTD)-
-(CTU)-
-(CTD)-
19
19
51
52
55
38
36
6
6
36
33
39
30
31
1
1
1
1
1
1
1
add 1 word per instruction when its address is 400
8
or greater
add 2 words per instruction when its address is 400
8
or greater
1 word
999 words
1 bit
999 bits
with 2 data values
with 10 data values
with 50 data values
add 8 µs per instruction when its address is 400
8
or greater
add 16 µs per instruction when its address is 400
8
or greater
1
2
3
4
5
6
7
8
9
10
11