2-10
IM 34M06P15-03E 2nd Edition: Jan. 31, 2012-00
z Holding Register
Holding registers are associated with data registers (D).
Holding Registers
（00001 to 65536）
F020604.VSD
Data Registers
D
(D00001 to D65535)
65536
00001
65535
Figure 2.6.4 Associations of Holding Registers and Data Registers (D)
D00001 is associated with 00001 of the holding registers.
The holding register device number associated with a data register is calculated using
the following formula.
Holding register device number = Data register number
The maximum amount of access points depends on the allocation points of the data
registers.
Tip
$0000 is used in the PDU for specifying the starting holding register number 00001 corresponding to
D00001.
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