Mitsubishi Electric MELCEC Q Series User Manual page 24

2. SYSTEM CONFIGURATION
(5)
(6)
The accessible device ranges have limit when the following modules are used:
Applicable Module
MELSECNET(II) data link module:
A1SJ71AP21, A1SJ71AR21
MELSECNET/B data link module:
A1SJ71AT21B
It is recommended that the network and data link modules are mounted to the basic
base unit.
When these modules are mounted to the extension base unit, the link refresh time
becomes longer than the case where they are mounted to the basic base unit.
Accessible Device Range in CPU
Device
Input (X), output (Y)
Internal relay (M)
latch relay (L)
Link relay (B)
Timer (T)
Counter (C)
Data register (D)
Link register (W)
Annunciator (F)
2 - 3
Accessible Range
X/Y0 to X/Y7FF
M0 to M8191
L0 to L8191
B0 to BFFF
T0 to T2047
C0 to C1023
D0 to D6143
W0 to WFFF
F0 to F2047