Maxiflex P3 PAC User Manual
31
-© Omniflex
UMM126XR18.pdf
Maxiflex Local Expansion Rack
Maxiflex
Slot:
I/O
Slot
8
I/O
Slot
9
I/O
Slot
10
I/O
Slot
11
I/O
Slot
12
I/O
Slot
13
I/O
Slot
14
I/O
Slot
15
DIT Start
Address:
44,000 46,000
48,000 50,000
52,000 54,000
56000
58,000
DIT End
Address:
45,999 47,999
49,999 51,999
53,999 55,999
57,999
59,999
No. of
Registers
2,000
2,000
2,000
2,000
2,000
2,000
2,000
2,000
Table 6.2: DIT Address Map of the Expander Rack in Extended DIT Address Mode 1
In some applications, when Remote I/O is not used it can be advantage to map 4000 DIT
registers of a NIM module’s DIT to the CPU. In this mode, 4000 DIT registers per I/O Slot are
made visible for I/O Slots 1 to 7 only. Hence the table would change as follows:
Maxiflex Local Master Rack
Maxiflex
Slot:
CPU
Dynamic
Data
Space
CPU
Config
Data
Space
I/O
Slot
1
I/O
Slot
2
I/O
Slot
3
I/O
Slot
4
I/O
Slot
5
I/O
Slot
6
I/O
Slot
7
DIT Start
Address:
0
60,000
30,000
34,000 38,000
42,000 46,000
50,000 54,000
DIT End
Address:
29,999
65499
33,999
37,999 41,999
45,999 49,999
53,999 57,999
No. of
Registers
30,000
5,499
4,000
4,000
4,000
4,000
4,000
4,000
4,000
Table 6.3: DIT Address Map of the CPU and Master Rack in Extended DIT Address Mode 2
The default setting for the extended DIT map is Mode 1: 2000 DIT registers per I/O slot.
To change this setting using Omniset, use the “Extended DIT Layout” Group under
“Configuration/Advanced Settings”.
6.3 CPU Dynamic Data Space (0-29,999)
This area of the DIT is typically used to store dynamic, real time data, and provides the
fastest access to data from any of the network ports or the user program.
6.4 Intelligent Modules in I/O Slots 1 to 15 (30,000-59,999)
These DIT register ranges provide direct access to the first 2,000 or 4000 DIT registers in
any intelligent Modules (such as Network Interface Modules) installed in the I/O slots of the
MAXIFLEX rack (as set by the Extended DIT Address Mode
– see section 6.2 above.
The separate User Manual for each intelligent Module defines the DIT registers allocated on
each module.
These DIT registers for given in each intelligent module User Manual will be shown
numbered from 0. To find
the CPU’s DIT Address for of the first 2,000 (or 4000) DIT registers
in an intelligent module as reflected in the CPU DIT, simply add the DIT register number