9
DEVICE EXPLANATION
9
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9.2 Internal User Devices
9.2.7 Link relay (B)
9.2.7 Link relay (B)
(1) Definition
Link relays are CPU module side relays used when refreshing the link relay (LB) data
of the MELECNET/H network module, etc. to the CPU module or when refreshing the
CPU module data to the link relays (LB) of the MELECNET/H network module, etc.
(2) Number of used N/O and N/C contacts
There are no restrictions on the number of contacts (N/O contacts, N/C contacts)
used in the program.
Diagram 9.18 Link refresh
Diagram 9.19 Link Relay
Link relayLink relay
B0
LB0
CPU module MELSECNET/H network module
Link refresh
setting range
Link refresh
X0
B0
T0
Y20
X1 B0
B100
X2 B0
B1FFF
SET B0
K20
No restrictions on the quantity used.
B0 switches ON at X0 OFF to ON.
The link relay (B0) ON can only be used for
internal CPU module processing, and cannot be
output externally.
B0 ON/OFF information is output from the output
module to an external destination.
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