Mitsubishi Electric MELSEC Q Series Reference Manual page 112

3 SPECIFICATIONS
[Link scan time]
[Communication speed: 10 Mbps]
LS = KB + (0.45
+ {LY
M
+ {LX
M
+ (T 0.001) + (F
[Communication speed: 25 Mbps]
LS = KB + (0.40
+ {LY
M
+ {LX
M
+ (T 0.0004) + (F
3 - 56
(4) Link scan time
Link scan time is based on a calculation of the following factors.
• Link device assignment points
• Number of stations connected
total number of stations) + {LX + LY + LB + (LW
+ LB + (LW
R M R M
+ LB + (LW
R M R M
4) [ms]
total number of stations) + {LX + LY + LB + (LW
+ LB + (LW
R M R M
+ LB + (LW
R M R M
4) [ms]
LS : Link scan time
KB, KR : constants
Total remote I/O
stations
KB
KR
LX : Total number of link inputs (LX) being used by all stations.
LY : Total number of link outputs (LY) being used by all stations.
LB : Total number of link relay (LB) being used by all stations
LW : Total number of link register (LW) being used by all stations
LY : Total number of link outputs (LY) being used by stations in M
M R
direction
: Total number of link relay (LB) being used by stations in M
LB
M R
direction
LW : Total number of link register (LW) being used by stations in M
M R
direction
LX : Total number of link input (LX) being used by stations in M
M R
direction
LB : Total number of link relay (LB) being used by stations in M
M R
direction
LW : Total number of link register (LW) being used by stations in M
M R
direction
T : Maximum number of bytes transmitting during one link scan
F : Number of stations that return to system (available only when an
error has occurred. Maximum number of stations that return to
system in a link scan (setting)
1: Total link device points set up in Network range assignment.
Note that the points assigned to reserved stations are excluded.
2: When multiple stations execute transient transmission simultaneously, the
value is a total of processing time at each station.
3: Set the maximum number of stations that return to system in a link scan
using the supplementary settings in the common parameters. (Refer to
section 5.1.4.)
16)} /16 0.0003
R
16)} /16 0.0003
R
16)} /16 0.0003
R
16)} /16 0.0003
R
1 to 8 9 to 16 17 to 24 25 to 32 33 to 40 41 to 48 49 to 56 57 to 64
4.0 4.5 4.9
3.9 3.1 2.6
1
1
1
1
1
1
MELSEC-Q
16)} /8 0.001 + KR
16)} /8 0.0004 + KR
5.3 5.7 6.2
2.3 1.7 1.1
3)
6.6 7.0
0.6 0.0
1
1
1
1
R
R
R
R
R
R
2
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