3.1 Basic Functionality
3.1.4 Scans
3-31
3
CPU Module Functionality
Example: High-speed Scan Time Set to 0.250 ms
*
The purpose of this system service register is to determine from a ladder program whether the I/O scan
service is being executed for MP2000 Optional Modules.
Example: High-speed Scan Time Set to 0.5 ms
*
The purpose of this system service register is to determine from a ladder program whether the I/O scan
service is being executed for MP2000 Optional Modules.
Low-speed (L) Scan
The setting range for the low-speed scan time is 2.0 to 300.0 ms (in increments of 0.5 ms).
I/O Processing
During the low-speed scan, the I/O service (I/O processing) is performed every scan, regard-
less of the set value.
The default low-speed scan time is 200.0 ms.
0.25 m
s
0.5 m
s
c
c
c
d
e
e
f
g
e
g
g
High-
s
peed
s
can
Ba
s
ic cycle
(0.5 m
s
)
Reference i
ss
ued at
c
MP2000
Optional Module
S
y
s
tem
s
ervice
regi
s
ter
S
B000008
*
Reference i
ss
ued at
e
Reference
i
ss
ued at
g
0.5 m
s
c
c
c
d
d
d
e
e
e
High-
s
peed
s
can
MP2000
Optional Module
S
y
s
tem
s
ervice
regi
s
ter
S
B000008
*
Ba
s
ic cycle
(0.5 m
s
)
Reference i
ss
ued at
c
Reference i
ss
ued at
d
Reference i
ss
ued at
e
Information