Rockwell Automation 57C570 AutoMax PC3000 User Manual - Manual (Page 148)

12Ć8
In drops 1Ć55, registers 0Ć31 contain data that an application
program in a corresponding drop has written to them. These
registers are then transmitted to the master and all other slaves on
the network. The number of registers that an application program
can write to is determined by the drop depth assigned to the
DCSĆNET network interface (32 * the drop depth).
For each drop, registers 32Ć63 contain the data that an application
program in the master rack has written to the master DCSĆNET
network module for the particular drop. Consequently, this data is
transmitted from the master to the addressed drop, with the other
drops receiving the data simultaneously. The number of registers
that a master DCSĆNET network module can write data to and then
transmit is 32 registers times the number of drops on the network.
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DCSĆNET network registers ББББББББББББ
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chapter 19
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configuring the network
variables
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the AutoMax Programming Executive
software instruction manual
12.8 Configuring the AutoMax PC3000 as a
PassiveĆListening DCSĆNET Network
Drop
You can configure the PC3000 as a passiveĆlistening drop on the
DCSĆNET network. This lets you use the AutoMax PC3000 to
monitor:
D DCSĆNET networks that have 55 drops
D network data without changing any network timing relationships
However, the AutoMax PC3000 cannot transmit data on the
DCSĆNET network when it is configured as a passiveĆlistening drop.
Jumper JP4 on the Processor card controls whether the AutoMax
PC3000 is operating as a passiveĆlistening drop. Follow electrostatic
discharge (ESD) precautions when handling the card.
(See section 5.1.)
To configure the AutoMax PC3000 as a passiveĆlistening drop, follow
these steps:
Step 1.
Remove power to the Processor card.
Step 2. Remove jumper JP4. See figure 12.2. If you need to
remove the card to access the jumper, follow the
procedures in sections 20.2.1 and 20.2.3.