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PROSEC T3H
2. Expanded Functions
2.2 Expanded registers
The T3H has the same types of registers as the T3. However, the address ranges of
some registers are expanded in the T3H.
This section explains the expanded registers and the notes.
2.2.1
External I/O register
The T3H can handle up to 76 I/O modules. Accordingly, the T3H has 512 words of
external I/O register.
Function type
Type
code
Address range
Quantity
Expression
example
Input register
XW
XW280
Output register
YW
000 - 511
Total 512 words
YW412
Direct input register
IW
IW280
Direct output register
OW
OW412
Input
device
X
X280A
Output device
Y
0000 - 511F
Total 8192 points
Y4128
Direct input device
I
I2809
Direct output device
O
O412C
Regarding the I/O allocation, the channel 1 of the IF321 is assigned to Unit 1 to 3,
and the channel 2 of the IF321 is assigned to Unit 4 to 6. The XW/YW registers are
assigned in the sequence of Unit 0
→
1
→
...
→
6.
2.2.2
Auxiliary
register
The T3H has 1000 words of auxiliary register.
Function type
Type
code
Address range
Quantity
Expression
example
Auxiliary register
RW
000 - 999
1000 words
RW725
Auxiliary device
R
000 - 999F
16000 points
R725B
NOTE
For details of functions of each register/device, refer to the T3 User’s
Manual.
