Mitsubishi Electric QJ71LP21 Reference Manual page 81

3 SPECIFICATIONS
[Remote master station refresh time (αm)]
Remote I/O station link refresh time (αr)
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(3) Link refresh time
The link refresh time (CPU module end processing time extension) is calculated
as shown below.
• Link device allotment points
• Type of CPU used
α
= KM1 + KM2
m
+ (network module cards –1) [ms]
α
= KM3 {LB + LX + LY + (LW
E
α
: Remote master station link refresh time
m
LB : The total number of link relays (LB) that station refreshes
LW : The total number of link registers (LW) that station refreshes
LX : The total number of link inputs (LX) that station refreshes
LY : The total number of link outputs (LX) that station refreshes
SB : Number of special relays (SB) for link
SW : Number of special register (SW) for link
α
: File register (R, ZR) transmission time on memory card
E
KM1, KM2, KM3 : Constants
1) When a network module is connected to main base unit
CPU type
QnHCPU, QnPHCPU,
2) When a network module connected is to extension base unit
CPU type
QnHCPU, QnPHCPU,
1: The total number of points for the range that is actually refreshed.
(Includes unused areas as well)
2: Becomes the total when simultaneous transient transmissions are
performed from multiple stations.
The remote I/O station link refresh time (αr) does not affect transmission delay
time
{LB + LX + LY + SB + (LW
16)} /16
Constant
QnCPU
QnPRHCPU
Constant
QnCPU
QnPRHCPU
16) + (SW
KM2
KM1
–3
( 10 )
0.30 0.48
0.13 0.41
KM2
KM1
–3
( 10 )
0.30 1.20
0.13 0.97
MELSEC-Q
16)} /16 + α
E
1
1
1
1
2
KM3
–3
( 10 )
0.60
0.53
KM3
–3
( 10 )
1.32
1.09
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