User's Manual
2. DEVICE RANGE THAT CAN BE SET
2 - 7
1
PREPARATORY 
PROCEDURES FOR 
MONITORING
2
DEVICE RANGE 
THAT CAN BE SET
3
ACCESS RANGE 
FOR MONITORING
4
HOW TO MONITOR 
REDUNTANT 
SYSTEM
5
BUS CONNECTION
6
DIRECT 
CONNECTION TO 
CPU
7
COMPUTER LINK 
CONNECTION
8
ETHERNET 
CONNECTION
•(For 32 bits)
Monitor and write only b8 to b15 and b24 to 31 of 
the buffer memory.
Example:
The monitor value is 00870043
H when monitoring 
BM0=87654321
H as mask type 6.
BM0=65002100
H when writing input value 
87654321H to BM0=00000000H as mask type 6.
(5) Setting of the module No. (MELSEC-FX)
Set the module No. of the special function unit or 
special function block to monitor or write.
The module No.0 to No.7 are assigned in order for the 
nearest module or block from the main unit. For details 
of the module No., refer to the following.
User's Manual (Hardware) of MELSEC-FX
(a) Direct specification
Specify the module No. (No.0 to No.7) of the 
special function unit or special function block 
directly, to monitor or write when setting the 
devices.
(b) Indirect specification
*1
Specify the module No. of the special function unit 
or special function block indirectly, to monitor or 
write when setting the devices, by using the 16-bit 
GOT internal data register (GD10 to GD25).
When specifying the station No. from 100 to 115 on 
GT Designer3, the value of GD10 to GD25 
corresponding to the module No. will be the 
module No. of the special function unit or special 
function block.
*1 The module No. cannot be specified indirectly for the multi-
drop connection.
Module No.
Compatible 
device
Setting range
100 GD10
0 to 7
For the setting other than the above, 
error (dedicated device is out of range) 
will occur.
If a non-existent module No. is set, a 
timeout error occurs.
101 GD11
::
114 GD24
115 GD25
H
BM0
87654321
00870043
H
Monitor value
H
BM0
87654321
00000000
H
Input value
BM0
65002100
H
(Before writing)
(After writing)










