Mitsubishi Electric Melsec-k Instruction Manual page 5

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GENERAL DESCRIPTION
The serial data link system permits data communication between plural programmable controllers
and
1/0
units to reduce wiring works of decentralized, long-distance
1/0
equipment, allow de-
Coaxial data link system
centralized control, and increase the total number of input/outputs.
The MELSEC-K series serial data link system is available in the type which utilizes coaxial cables
or optical fiber cables for the transmission system. This instruction manual explains about the
specifications, instal lation, programming, and external wiring of the optical data link system which
utilizes optical fiber cables.
Optical data link system
Mas t e r c h a n ne1
Local channel
CPU unit K3NCPU
K2CPU-S3
K2HCPU K2NCPU
Link unit KJ71 L2
CPU unit
K3NCPU(P2)
KZCPU-S3 KZHCPU KZNCPU KO
Link unit KJ71 L3 KOD LS
K3NCPUP2 (Link unit incorporated)
3emotechannel
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CPU unit
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K O
-
KOJl P
Link unit K J72 L5 KOD LS KJ72P5
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Base unit
1
Base unit which can be used for
CPU unit
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t
K12BN, K15BN, K18BN
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K18BE
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K12BN, K15BN, K18BN
K18BE
Base unit
Base unit which can be used for
CPU unit
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Number
Of
I ' O
link points
Max. 128 points
Local channel Max. 51
2
points for
f y a , 2 1 8 & ~ ~ ~ I
Max. 280 point
Remote channel
I channel
for 1 channel
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Max. 480 points in total for all channels
Data register
link
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Max. 24 points for 1 channel
Max. 24 points for 1 channel
Number of
points
Max. 2048 points
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Master channel
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Max. 480 points
Used range
Ca bl e
Cable length
DO t o 95
D O t o 95
Coaxial cable Optical fiber cable
Overall extension length 500m
2km between channels
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Maximum number of
slave channels
Communication method
Half duplex bit serial
Half duplex bit serial
7 units
Transmission processing time
(for 7 channels
X: 32 points, Y: 32 points)
32 units
24.8ms 6.5ms
Setting of online/offline
Setting of channel number
Communication speed
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250KBPS
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500K B PS
Not provided Provided
Slide switch on printed circuit board
Digital switch on front of CPU unit
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Setting of intermittent
control time
Not provided
P r
ov i ded
Automatic reconnection
function
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Not provided Selectable by switch
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Table 1.1 Comparison between Coaxial Data Link System and Optical Data Link System