Mitsubishi Electric L02SCPU User's Manual And Reference page 385

(d) Device data latch processing time
When the latch range is set, the processing time shown below is required.
[Device data latch processing time]
(N1  KM1) + ((N2  16 + N3)  KM2) [s]
• N1: Number of device types specified to be latched
• N2: Number of bit device points specified to be latched
• N3: Number of word device points specified to be latched
CPU module
L02SCPU, L02SCPU-P
L02CPU, L02CPU-P
L06CPU, L06CPU-P, L26CPU, L26CPU-P,
L26CPU-BT, L26CPU-PBT
*1 The scan time does not increase even if the latch range is set for the file register (R, ZR), extended data register (D), or
extended link register (W).
*2 Count the latch range (1) and the latch range (2) as different device types.
*3 The scan time will not increase if the latch range is set for the file register (ZR), extended data register (D), or extended
link register (W).
To reduce the scan time increase due to latch
latch relay) as much as possible by performing the following.
• Move data to be latched to the file register.
• Store device data that is less frequently updated in the standard ROM with the SP.DEVST instruction. (The device
data stored in the standard ROM can be read with the S(P).DEVLD instruction. ( Page 180, Section 3.29)
*1 For file registers (including an extended data register (D) and an extended link register (W)), the scan time is not
increased due to latch.
*2
*3
*3
KM1
4.4
3.0
3.0
*1
, minimize the number of latch points (latch (1) setting, latch (2) setting, and
*1
KM2
0.12
0.12
0.05
APPX
A
383