Rockwell Automation 57C570 AutoMax PC3000 User Manual - Manual (Page 147)

12Ć7
12.6 Using the AutoMax PC3000 CPU Common
Memory Variables
The AutoMax PC3000 CPU has registers available for assigning
common memory variablesĊvariables that you want to share
between programs. The registers are volatile by default. Their values
are not retained when the PC3000 loses power or you perform a
Stop All. However, you can specify a variable to be nonĆvolatile, so
that its value is retained through power cycles and Stop All
conditions.
Each PC3000 also has preĆdefined common memory variables, but
you must enter them on the Variable Configurator form if you want to
use them in an application program. These preĆdefined variables
are:
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• ăAUTORUNSTATUS@
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True when AUTO RUN is enabled for the rack;
false if AUTO RUN is not enabled.
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• ăFORCINGSTATUS@
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True when a variable is forced in the rack;
false when no variables are forced in the rack.
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True when the AutoMax PC3000's battery is
good.
Make sure you assign BATTERYSTATUS4@ to a common memory
variable and write application code to periodically monitor this
variable. Monitoring this variable is the only way to obtain status on
the AutoMax PC3000 battery.
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For more information about: ББББББББББББ
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See:
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symbolic programming
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chapter 15 and the instruction manual of
your chosen programming language
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configuring common memory
variables
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AutoMax Programming Executive software
instruction manual
12.7 Using the DCSĆNET Network Register
Variables
In the Variable Configurator for the PC3000 DCSĆNET network
interface, you can access these types of registers:
D setup registers
D drop status registers
D broadcast registers
D data exchange registers for drops 1Ć55
The AutoMax PC3000 DCSĆNET network interface contains 56
areas, or drops, each containing 64 16Ćbit registers. These registers
are used for data exchange between the master network module
and the slave network modules in a system. Drop 0 is reserved for
status and broadcast messages. The remaining 55 drops are
reserved for data exchange among the modules.