Rockwell Automation 1794-ASB/E Remote I/O Adapter Module User Manual - Manual (Page 41)

3–7 Communicating with FLEX I/O Modules
Publication 1794ĆUM009D-EN-P - April 2004
Use standard 32 point addressing when:
•
you use 32 point modules in your system
•
you need full FLEX I/O module functionality, such as delay time
selection on input modules, fuse-blown indication on the
1794-OB8EP, etc.
•
using combination modules, such as the 1794-IB16XOB16 16
in/16 out module
In standard – 32 mode, each module position equals two I/O groups
– 2 words of input image and 2 words of output image.
00 07 10 17 00 07 10 17
0
1
2
3
4
5
6
7
I/O Group
Input Image Table for Rack N Output Image Table for Rack N
M0 M1 M2 M3 M4 M5 M6 M7
ILL, OLL = Bits 0 thru 7 for input and output words of 32 point modules
ILH, OLH = Bits 8 thru 15 for input and output words of 32 point modules
IL, OL = Bits 0 thru 7 for input and output words for 16 and 8 point modules
IH, OH = Bits 8 thru 15 for input and output words for 16 point modules
MCB = Module Control Byte (output data)
MSB = Module Status Byte (input data)
ASB/E ILH ILL IH IL
OHH OHL
M0ĆILH
M0ĆIHH
M0ĆOLL
M0ĆOHL
M2ĆOLH
M0ĆOLH
M0ĆOHH
MCB
MSB
MCB
MSB
OL
ILL
Standard 32 Addressing Example -
8 modules = 2 logical racks, N and N+1 = 16 I/O groups
Gr. 0
M3ĆIHH
M2ĆOHL
M3ĆOLL
M3ĆOHL
M3ĆOLH
M3ĆOHH
M1ĆILH M1ĆOLL M1ĆOLL M1ĆOLH M1ĆOLH
M1ĆOHL M1ĆOHL M1ĆOHH M1ĆOHH M1ĆIHH M1ĆIHH
M3ĆILH M3ĆILH
1 module position is 2 I/O groups
Legal Module Placement in Standard Addressing
Any module in any slot
OLH OLL OH OL OLL
IHH IHL IL
Eight terminal bases per adapter (maximum)
Each terminal base represents 2 I/O groups.
IHL, OHL = Bits 16 thru 23 for input and output words of 32 point modules
IHH, OHH = Bits 24 thru 32 for input and output words of 32 point modules
M2ĆILH M2ĆILH
M2ĆIHH M2ĆIHH
M0ĆILL M0ĆILL
M0ĆIHL M0ĆIHL
M3ĆIHL M3ĆIHL
M1ĆILL M1ĆILL
M1ĆIHL M1ĆIHL
M3ĆILL M3ĆILL
M2ĆILL M2ĆILL
M2ĆIHL M2ĆIHL
M2ĆOLH M2ĆOLH
M2ĆOHH M2ĆOHH
00
11
22
33
44
55
66
77
I/O Group I/O Group
00
11
22
33
44
55
66
77
I/O Group I/O Group
00 07 10 17 00 07 10 17
0
1
2
3
4
5
6
7
I/O Group
Input Image Table for Rack N Output Image Table for Rack N
M0ĆILH
M0ĆIHH
M0ĆOLL
M0ĆOHL
M2ĆOL
M0ĆOLH
M0ĆOHH
M3ĆIHH
M3ĆOLL
M3ĆOHL
M3ĆOLH
M3ĆOHH
M1ĆILH
M1ĆIHH
M2ĆIH
M3ĆILH
M0ĆILL
M3ĆIHL
M1ĆILL
M1ĆIHL
M2ĆIL
M3ĆILL
M2ĆOH
M1ĆOLL
M1ĆOHL
M1ĆOLH
M1ĆOHH
0
1
2
3
4
5
6
7
M0ĆOLL
M0ĆOHL
M2ĆOLH
M0ĆOLH
M0ĆOHH
M3ĆIHH
M2ĆOHL
M3ĆOLL
M3ĆOHL
M3ĆOLH
M3ĆOHH
M1ĆILH M1ĆOLL M1ĆOLL M1ĆOLH M1ĆOLH
M1ĆOHL M1ĆOHL M1ĆOHH M1ĆOHH M1ĆIHH M1ĆIHH
M3ĆILH M3ĆILH
M2ĆILH M2ĆILH
M2ĆIHH M2ĆIHH
M4ĆMSB
M3ĆIHL M3ĆIHL
M1ĆILL M1ĆILL
M1ĆIHL M1ĆIHL
M3ĆILL M3ĆILL
M2ĆILL M2ĆILL
M2ĆIHL M2ĆIHL
M2ĆOLH M2ĆOLH
M2ĆOHH M2ĆOHH
00
11
22
33
44
55
66
77
00
11
22
33
44
55
66
77
I/O Group
00 07 10 17 00 07 10 17
0
1
2
3
4
5
6
7
I/O Group
Input Image Table for Rack N+1 Output Image Table for Rack N+1
M7ĆIHH
M7ĆILH
M7ĆIHL
M6ĆIL
M7ĆILL
M5ĆMSB
M7ĆOHH
M7ĆOLH
M7ĆOHL
M6ĆOL
M7ĆOLL
Gr. 1 Gr. 2 Gr. 3 Gr. 4 Gr. 5 Gr. 6 Gr. 7 Gr. 0 Gr. 1 Gr. 2 Gr. 3 Gr. 4 Gr. 5 Gr. 6 Gr. 7
ILH ILL
OHH OHL OLH OLL
IHH IHL ILH ILL
OHH OHL OLH OLL
IHH IHL ILH
OLH
IHH
OHH
IHL
OHL
Note: Shaded areas represent data which is not available.
Rack N Rack N + 1
IB32 OB32 IB16 IB32 Analog Analog IB8 OB32
M4ĆMCB
M5ĆMCB
Standard - 32 Addressing