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.
NOTE
For details of functions of each register/device, refer to the T3 User’s
Manual.
2.2.1External 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 | Address range | Quantity | Expression |
| code |
|
| example |
Input register | XW | 000 - 511 | Total 512 words | XW280 |
Output register | YW | YW412 | ||
Direct input register | IW |
|
| IW280 |
Direct output register | OW |
|
| OW412 |
Input device | X | 0000 - 511F | Total 8192 points | X280A |
Output device | Y | 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.
2.2.2Auxiliary register
The T3H has 1000 words of auxiliary register.
| Function type | Type | Address range | Quantity | Expression | |
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| code |
|
| example | |
| Auxiliary register | RW | 000 - 999 | 1000 words | RW725 | |
| Auxiliary device | R | 000 - 999F | 16000 points | R725B | |
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