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(b) Master station and local stations
• Master station (RX) Local station (RY)
The table below shows formulas to calculate time from when a device in the CPU module of the local
station turns on or off until that of the master station turns on or off.
[When m = 1]
[When m = 2 to 4]
SM: Sequence scan time of the master station
LS: Link scan time
SL: Sequence scan time of the local station
n1: SM LS (Round up the calculated value to the nearest integer.)
n: (LS × m) SL (Round up the calculated value to the nearest integer.)
k: SL (LS × m) (Round up the calculated value to the nearest integer.)
m: Number of points of "RWw/RWr Setting" set for the local station in "Network Configuration Settings"
• Master station (RY) Local station (RX)
The table below shows formulas to calculate time from when a device in the CPU module of the master
station turns on or off until that of the local station turns on or off.
SM: Sequence scan time of the master station
LS: Link scan time
SL: Sequence scan time of the local station
n3: (SL LS) (Round up the calculated value to the nearest integer.)
Calculation
value
Block data assurance per station No block data assurance per station
Asynchronous mode Synchronous mode Asynchronous mode Synchronous mode
Normal value (SM × 1) + (LS × k) + (SL × 1) (SM × 1) + (LS × 1) + (SL × 1) (SM × 1) + (LS × 1) + (SL × 1) (SM × 1) + (LS × 1) + (SL × 1)
Maximum
value
(SM × 1) + (LS × (k + n1))
+ (SL × 1)
(SM × 1) + (LS × k) + (SL × 1) (SM × 1) + (LS × 2) + (SL × 1) (SM × 1) + (LS × k) + (SL × 1)
Calculation
value
Block data assurance per station No block data assurance per station
Asynchronous mode Synchronous mode Asynchronous mode Synchronous mode
Normal value
(SM × 1) + (LS × m × k)
+ (SL × n)
(SM × 1) + (LS × m) + (SL × n) (SM × 1) + (LS × m) + (SL × n) (SM × 1) + (LS × m) + (SL × n)
Maximum
value
(SM × 1) + (LS × m × (k + n1))
+ (SL × (n + 1))
(SM × 1) + (LS × m × 2)
+ (SL × (n + 1))
(SM × 1) + (LS × (n1 + 1))
+ (SL × 2)
(SM × 1) + (LS × m × 2)
+ (SL × 2)
Item
Number of points in "RWw/RWr Setting"
0 to 256 words 257 to 512 words 513 to 768 words 769 to 1024 words
m
1234
Calculation
value
Block data assurance per station No block data assurance per station
Asynchronous mode Synchronous mode Asynchronous mode Synchronous mode
Normal value (SM × 1) + (LS × n3) + (SL × 1) (SM × 1) + (LS × 1) + (SL × 2) (SM × 1) + (LS × 1) + (SL × 1) (SM × 1) + (LS × 1) + (SL × 1)
Maximum
value
(SM × 1) + (LS × (n3 + 1))
+ (SL × 2)
(SM × 1) + (LS × 2) + (SL × 2) (SM × 1) + (LS × 2) + (SL × 2) (SM × 1) + (LS × 2) + (SL × 2)