Mitsubishi Electric GOT1000 Series Connection Manual page 257

Device name
Coils (0)
*1
Discretes input (1)
*1
Input registers (3)
Holding registers (4)
Extension file register (6)
*1 Only reading is possible.
POINT POINT POINT
(1) Range of coils and input relays that can be monitored
The device range of MODBUS equipment differs depending on the type.
When using types that the device range for coils and input relays are other than hexadecimal, monitoring to
the device maximum range may not be possible.
In this case, the device range extends to the last number divisible by 16.
Example: For a type whose coil device range is from 0 to 9999.
The range that can be actually monitored is from 0 to 9984.
(2) Address conversion example
When monitoring the holding register's address "1234H", GT Designer3 displays "4*****" since GT Designer3
processes the internal conversion in decimal format as follows:
GT Designer3 converts the holding register's address "1234H" to "04660" in decimal format.
Then, "+1" is added to this decimal address since the holding register's address on GT Designer3 always
starts from "1."
Therefore, the holding register's address "1234H" is displayed as "404661" on GT Designer3.
Holding register
000001
100001
300001
400001
File No.: 0 to104
600000
1234H
"4 04660" +1
"404661"
Setting range
to 065536
to 165536
to 365536
to 465536
to 609999
5. MODBUS(R)/TCP CONNECTION
5.5 Device Range that Can Be Set
1
Device No.
representation
Decimal
2
Decimal
3
4
5
6
7
8
5 - 7