GE IC697CHS750 Rack, 5 Slots, Rear Mount
This entry determines how Global Data will be set up for the Bus Controller. If the Bus Controller will not send or receive Global Data, selectNONE.
If the Bus Controller will transmit Global Data, select MANUAL if you
want to specify a reference address and data length. Or select AUTO to
let the Logicmaster 90 software automatically configure the data length
and Global Data address. See “Automatic Global Data Setup” on page
19.
If you select MANUAL, the following entries appear:
Specify the beginning PLC address from which data will be transmitted
on the bus. It can be from %I, %Q, %G, %R, %AI, or %AQ memory.
Also for MANUAL configuration mode, this entry specifies the amount
of Global Data to be sent each bus scan.
If bit–oriented memory (%I, %Q, or %G) is selected above, this may be
0 to 1024 bits. It must be a multiple of 8. If you enter a number that is
not a multiple of 8, the software will automatically adjust it upward.
If word–oriented memory (%AI, %AQ, or %R) is selected above, this
may be 0 to 64 words. If more than 64 words are selected, the Logicmaster 90 software automatically adjusts the length to 64 words.
The total amount of memory specified must not exceed the configured
memory size for that memory type. For example, for the 731 CPU, the
maximum value for %I memory that can be configured is 512.
This information is not used by another Series 90–70 Bus Controller. If the
Global Data sent by this Bus Controller will be received by a Series Six
PLC or a Series Five PLC, use this entry to configure the destination
register address in the other PLC. Only one such destination address
can be specified for Global Data sent by each Bus Controller; if there is
more than one Series Six and/or Series Five PLC on the bus, they must
all use the same register address for Global Data received from this Bus
Controller. For information about selecting and entering a register address for one of these PLCs, refer to the Genius I/O System User’s Manual.
Note
The Bus Controller’s Global Data address will not be displayed
on the Hand–held Monitor’s Block/Bus Status screen unless
you enter a register address here that corresponds to the actual
Global Data address.
If the Global Data destination is another Series 90–70 PLC, the destination memory address is specified as part of that PLC’s configuration.

To accommodate additional Bus Controllers in the same rack, %G memory has five more
areas, identified as %GA, %GB, %GC, %GD, and %GE. The second Bus Controller configured in
AUTO mode is automatically assigned to %GA, the third to %GB, and so on.
Within those memory areas, reference assignments and Global Data lengths are the
same for %G.
1st Bus
Controller
2nd Bus
Controller
3rd Bus
Controller
4th Bus
Controller
5th Bus
Controller
6th Bus
Controller
Device
Number
%G
Addresses
%G
Addresses
%GB
Addresses
%GC
Addresses
%GD
Addresses
%GE
Addresses
16 1–32 1–32 1–32 1–32 1–32 1–32
17 33–64 33–64 33–64 33–64 33–64 33–64
18 65–96 65–96 65–96 65–96 65–96 65–96
19 97–128 97–128 97–128 97–128 97–128 97–128
20 129–160 129–160 129–160 129–160 129–160 129–160
21 161–192 161–192 161–192 161–192 161–192 161–192
22 193–224 193–224 193–224 193–224 193–224 193–224
23 225–256 225–256 225–256 225–256 225–256 225–256
24 257–385 257–385 257–385 257–385 257–385 257–385
25 386–512 386–512 386–512 386–512 386–512 386–512
26 513–640 513–640 513–640 513–640 513–640 513–640
27 641–768 641–768 641–768 641–768 641–768 641–768
28 769–896 769–896 769–896 769–896 769–896 769–896
29 897–1024 897–1024 897–1024 897–1024 897–1024 897–1024
30 1025–1152 1025–1152 1025–1152 1025–1152 1025–1152 1025–1152
31 1153–1280 1153–1280 1153–1280 1153–1280 1153–1280 1153–1280
Assigning a Bus Controller to a %G channel in AUTO mode reserves that channel; no
part of it can be assigned to another Bus Controller in the rack. If an ”external” device
on the bus sends Global Data to the Bus Controller, that data will be placed in the same
channel, at the starting address that corresponds to the other controller’s Device Number. The starting location cannot be changed but
the length can, if necessary, by switching to MANUAL mode. If the length is changed, it is important to be sure that the new length
does not overlap a memory area being used for another device’s Global Data.