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3.1 Basic Functionality
Scans
3-34

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 0.125 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, regardless of the set
value.
Setting the High-speed and Low-speed Scan Times
Use MPE720 version 7 and perform the procedure given below to set the high-speed and low-speed scan
times.
1.
Stop the CPU Unit.
The default low-speed scan time is 200.0 ms.
0.25 ms
0.5 ms
c
c
c
d e
e
f g
e
g
g
High-speed scan
Basic cycle
(0.5 ms)
Reference issued at c
MP2000
Optional Module
System service
register SB000008*
Reference issued at e Reference
issued at
g
0.125 ms
0.5 ms
c
c
c
d
e f g
g
h i j k
k
k g
High-speed scan
Basic cycle
(0.5 ms)
MP2000
Optional Module
System service
register SB000008*
Reference issued at c Reference issued at g Reference
issued at
k
Information