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MELSEC-Q
3 SPECIFICATIONS
(3) Link refresh time
The link refresh time (CPU module end processing time extension) is calculated
as shown below.
• Link device assignment points
• Type of CPU used
[Remote master station link refresh time ( m)]
m
= KM1+KM2
E
= KM3
LB+LX+LY+SB
16
+LW+SW
LB+LX+LY
16
+LW
+
E
[ms]
am : Remote master station link refresh time
LB : Total points of link relays (LB) refreshed by the corresponding station
1
LW : Total points of link registers (LW) refreshed by the corresponding station
1
LX : Total points of link inputs (LX) refreshed by the corresponding station
1
LY : Total points of link outputs (LY) refreshed by the corresponding station
1
SB : Number of points of the link special relay (SB)
SW : Number of points of the link special register (SW)
E : Transfer time of the file registers (R, ZR), extended data register (D),
and extended link register (W) on the memory card
2
KM1, KM2, KM3 : Constants
1: Total points are the sum of link devices set in the link refresh parameter settings
and in the network range settings. The points assigned for reserved station are
not included.
2: 0 when not used.
(a) When a master module is connected to main base unit
Constant
CPU type
KM1
KM2
(
10
–3
)
KM3
( 10
–3
)
High Performance
model QCPU
Q02CPU 0.30 0.48 0.47
Other than above
0.13 0.41 0.33
Process CPU
Redundant CPU
Universal model
QCPU
Q00UJ/Q00U/Q01UCPU 0.16 0.41 —
Q02UCPU 0.16 0.41 0.39
Q03UD/Q03UDECPU 0.09 0.41 0.39
Other than above 0.09 0.41 0.33