Omron CJ1W-PNT21 Operation Manual page 29

CJ1W-PNT21 Unit components
Note
Note
Unit Number and CPU Bus
Unit Word Allocations
1 Turn OFF the power supply before setting the Unit number.
2 Set the rotary switch to the (new) Unit number. Use a small flathead
screwdriver to make the setting, taking care not to damage the rotary
switch. The unit number is factory-set to 0.
3 Turn ON the power again.
Always turn OFF the power to the PLC CPU before changing the Unit
number setting. The Unit only reads the Unit number setting during ini-
tialization after power-up, not after a software reset.
If the unit number is set for the first time or is changed, an I/O table must
be created for the PLC. For more information regarding creating the PLC
I/O table please consult the manual W393 SYSMAC CJ Series Program-
mable Controllers Operation Manual.
The lower two rotary switches are reserved for future use.
With CJ-series PLCs, data areas for CPU Bus Units are automatically
allocated in the CIO and DM Areas. The PROFINET I/O Controller Unit uses
these areas for receiving control data from the CPU Unit and for notifying the
CPU Unit about its status. The addresses in the allocated areas for the CPU
Bus Unit are important when creating the user program for using the
PROFINET I/O Controller Unit. This must be considered when setting the unit
number.
The contents of the allocated CIO and DM Words are discussed in detail in 4-
2 Allocated CIO Area Words. The tables below show the relation between the
unit number and the allocated CIO Area and DM Area words.
/i
Unit No. Allocated words
(decimal)
0 (0) CIO1500 to CIO1524
1 (1) CIO1525 to CIO1549
2 (2) CIO1550 to CIO1574
3 (3) CIO1575 to CIO1599
4 (4) CIO1600 to CIO1624
5 (5) CIO1625 to CIO1649
6 (6) CIO1650 to CIO1674
7 (7) CIO1675 to CIO1699
Unit No. Allocated words
(decimal)
8 (8) CIO1700 to CIO1724
9 (9) CIO1725 to CIO1749
A (10) CIO1750 to CIO1774
B (11) CIO1775 to CIO1799
C (12) CIO1800 to CIO1824
D (13) CIO1825 to CIO1849
E (14) CIO1850 to CIO1874
F (15) CIO1875 to CIO1899
Section 3-1
15