491
Cycle Time
Section 7-3
7-3-3
I/O Response Time
The I/O response time is the time it takes after an input signal has been
received (i.e., after an input bit has turned ON) for the PC to check and pro-
cess the information and to output a control signal (i.e., to output the result of
the processing to an output bit). The I/O response time varies according to the
timing and processing conditions.
The minimum and maximum I/O response times are shown here, using the
following program as an example.
––
SRCH
49.5
Searching word, results to word
1.875
1.99 ms
Searching 1,024 word via
*
DM, results to
*
DM
11.34 ms
Searching 6,144 word via
*
DM, results to
*
DM
––
STUP
160.8
Built-in RS-232C port, word designation
1.875
177.0
Built-in RS-232C port,
*
DM designation
160.8
Peripheral port, word designation
177.0
Peripheral port,
*
DM designation
300.0
Serial Communications Board port 1 or 2, word designation
317.0
Serial Communications Board port 1 or 2 port,
*
DM designa-
tion
––
TAN
1.10 ms
Word
→
word
1.875
1.14 ms
*
DM
→
*
DM
––
TTIM
41.8
Set value specified in word
Reset:
40.0
IL:
39.4
JMP:
21.0
63.2
Set value specified in
*
DM Reset:
59.4
IL:
60.1
JMP:
34.0
––
SUM
57.4
Adding one word, results to word
1.875
5.15 ms
Adding 999 words via
*
DM, results to
*
DM
––
XFRB
29.2
Transferring 1 bit between words with a constant for control
data
1.875
45.3
Transferring 1 bit between words with a word for control data
226.5
Transferring 255 bits between
*
DM with
*
DM for control data
––
ZCP
31.4
Comparing a constant to a word range
1.875
36.3
Comparing a word to a word range
88.7
Comparing
*
DM to a
*
DM range
––
ZCPL
61.0
Comparing words to a word range
1.875
116.3
Comparing
*
DM to a
*
DM range
––
+F
110.4
Word + word
→
word
1.875
––
162.4
*
DM +
*
DM
→
*
DM
––
–F
122.0
Word – word
→
word
1.875
––
173.8
*
DM –
*
DM
→
*
DM
––
*
F
120.0
Word x word
→
word
1.875
––
172.0
*
DM x
*
DM
→
*
DM
––
/F
135.6
Word
÷
word
→
word
1.875
––
187.0
*
DM
÷
*
DM
→
*
DM
Code Mnemonic
ON
execution
time (
µ
s)
Conditions
OFF execution
time (
µ
s)
Input
Output
