
Relays, Memory Areas and Constants
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1.3.6
Link Data Registers (LD) for FP2/FP2SH/FP10SH
Function of link data registers (LD)
Link data registers are data memories for “PC links”, which are shared between multiple
programmable controllers which are connected through the same MEWNET link.
The following types of MEWNET links are available.
−
MEWNET-H link system for FP10SH (for coaxial cables)
−
MEWNET-W link system for FP2, FP2SH and FP10SH (for wire cables)
−
MEWNET-P link system for FP10SH (for fiber
−
optic cables)
When data is written to a link data register of one PLC, the contents are stored in the
link data registers that have the same numbers, in other PLCs connected through the
MEWNET.
Link station
LDn
Send
Link
station
LDn
Receive
MEWNET
CPU
CPU
When link data registers are used, data can be exchanged between PLCs simply by
writing the data, as shown here.
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