Mitsubishi 00JCPU User Manual page 396

9.2.7 Link relay (B)
(1) Definition
The link relay (B) is a relay on the CPU module side, and it is used for refreshing the link relay (LB) data of
another module such as a MELECNET/H network module to the CPU module or refreshing the CPU module data
to the link relay (LB) of the MELECNET/H network module.
CPU module
B0
(2) Allowable number of normally open or closed contacts
There are no restrictions on the number of normally open or closed contacts used in a program, as long as the
program capacity is not exceeded.
X0
B0
B0
X1
B0
X2
9 - 21
Link relay
Link refresh
Figure 9.18 Link refresh
SET B0
K20
T0
Y20
B100
B1FFF
Figure 9.19 Link relay
MELSECNET/H network module
Link relay
LB0
No restrictions on the quantity used.
B0 is set to on when X0 turns on from off.
Link relay (B0) can be set to on only for use inside
the CPU module, and not for output to the
outside.
The on/off information of B0 is output from the
output module to the external device.
Link refresh
setting range