Rockwell Automation AutoMax R-Net Processor Module User Manual
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4Ć7
When enabled by the Transmit Global Data Enabling Registers
(registers 50Ć53), the individual points within these registers are
broadcast to all other drops on the network. A global coil is enabled
by setting its corresponding bit in the Transmit Global Data Enabling
Registers.
WARNING
IT IS THE USER'S RESPONSIBILITY TO ENSURE THAT ANY GIVEN GLOBAL BIT
IS ENABLED TO BE TRANSMITTED IN ONLY ONE DROP. FAILURE TO DO SO
WILL CAUSE RANDOM BEHAVIOR OF THE GLOBAL DATA. UNEXPECTED
MACHINE MOVEMENT COULD RESULT. FAILURE TO OBSERVE THIS
PRECAUTION COULD RESULT IN BODILY INJURY AND/OR DAMAGE TO THE
EQUIPMENT.
Example:
Transmit Global Data Enabling Register 50
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00(octal)
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00(decimal)
0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0
Global Data Register 121 (AutoMate Image Register 71)
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00(octal)
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00(decimal)
1 1 0 0 1 1 0 0 0 1 0 0 0 0 0 0
In the above example, bits .13 and .07 (octal) have been set in
Transmit Global Data Enabling Register 50. Therefore, the status of
bits .13 and .07 (octal) of the corresponding Global Data Receiving
Register, register 121 (AutoMate image register 71), is now global
and will remain global until a zero is written to bits .13 and .07 in
register 50. When not enabled by the Transmit Global Data Enabling
Registers, bits in registers 71.00 Ć 74.17 are used as global inputs.
In figure 4.5, when global coil 1771.00 is executed in the A40 Node 0,
its status is passed to the RĆNet processor. When Node 0 gets the
token (access to network), the status of all global coils from Node 0
are sent over the network. The information is received by all the RĆNet
processors as well as the AutoMax RĆNet Processor. When the
AutoMate 30 and the AutoMax (Nodes 1 and 2) do their next scan,
contact 71.00 (A30) and 71.00 (AutoMax) will assume the new status
as determined by global coil 1771.00. When Node 0 is finished, the
token is passed to Node 1. From Node 1, it is passed to Node 2 and
then back to Node 0.
1771
A
G
RĆNet
A40
Node 0
B
71
RĆNet
A30
Node 1
C
71
AMXRĆNet
AutoMax
Node 2
.00
.00
.00
Figure 4.5Ć Use of Global Coils