44
Simple I/O Allocation
Section 4-2
Note
1.
Individual bits will be enabled only through those allocated to the highest
communications unit number.
2.
Words will be allocated only through the highest communications unit num-
ber.
Example:
If the highest communications unit number is set to 10, then the IN Area
will be the 66 words, i.e., from the first word to the first word + 65.
4-2-3
Allocating Data in the Master
Data is allocated in the master in the same way as other slaves using either
fixed allocations or user-set allocations.
Note
The sizes of the IN and OUT Areas allocated to the DeviceNet Communica-
tions Unit are larger than for other slaves, so make sure that the allocated
words are within the DeviceNet Area and do not overlap with words used by
other slaves.
Fixed Allocations
When fixed allocations are used, the location for allocated data is automati-
cally determined according to the node address of the DeviceNet Communi-
cations Unit. Fixed allocations can be set without the Configurator.
With fixed allocations, however, each node address is allocated one word.
Therefore, the node addresses allocated to the DeviceNet Communications
Unit cannot be used by other nodes, as shown below.
First word + 69
#14 ch4 Present Bank Set Point
(See note 2.) #11 ch4 Process Value
(See note 2.)
First word + 70
#15 ch1 Present Bank Set Point
(See note 2.) #12 ch1 Process Value
(See note 2.)
First word + 71
#15 ch2 Present Bank Set Point
(See note 2.) #12 ch2 Process Value
(See note 2.)
First word + 72
#15 ch3 Present Bank Set Point
(See note 2.) #12 ch3 Process Value
(See note 2.)
First word + 73
#15 ch4 Present Bank Set Point
(See note 2.) #12 ch4 Process Value
(See note 2.)
First word + 74
---
---
#13 ch1 Process Value
(See note 2.)
First word + 75
---
---
#13 ch2 Process Value
(See note 2.)
First word + 76
---
---
#13 ch3 Process Value
(See note 2.)
First word + 77
---
---
#13 ch4 Process Value
(See note 2.)
First word + 78
---
---
#14 ch1 Process Value
(See note 2.)
First word + 79
---
---
#14 ch2 Process Value
(See note 2.)
First word + 80
---
---
#14 ch3 Process Value
(See note 2.)
First word + 81
---
---
#14 ch4 Process Value
(See note 2.)
First word + 82
---
---
#15 ch1 Process Value
(See note 2.)
First word + 83
---
---
#15 ch2 Process Value
(See note 2.)
First word + 84
---
---
#15 ch3 Process Value
(See note 2.)
First word + 85
---
---
#15 ch4 Process Value
(See note 2.)
Address
OUT Area
IN Area
TC2
IN Area
Allocated 16 to 46 words, therefore, uses 16
to 46 node addresses.
OUT Area
Allocated 8 to 38 words, therefore, uses 8 to
38 node addresses.
TC4 (See
note.)
IN Area
Allocated 26 to 86 words, therefore, uses 26
to 86 node addresses.
OUT Area
Allocated 14 to 74 words, therefore, uses 14
to 74 node addresses.
Summary of Contents for EJ1 - 07-2008
Page 3: ...iv...
Page 19: ...xx...
Page 33: ...14 Initial Temperature Controller Settings Section 1 4...
Page 53: ...34 Wiring the Temperature Controllers Section 3 4...
Page 101: ...82 Ladder Programming Examples Section 4 6...
Page 143: ...124 Sending Explicit Messages Section 6 5...
Page 155: ...136 Message Communications Characteristics Section 7 2...
Page 163: ...144 Maintenance Section 8 2...
Page 189: ...170 Allocation Numbers for Configurators Manufactured by Other Companies Appendix B...
Page 197: ...178 Index...
