Справочник Пользователя для Allen-Bradley devicenet modules in logix5000 control systems
Publication DNET-UM004A-EN-P - March 2004
1-12 Before You Begin
If You Are Using a SoftLogix5800 Controller
The 1784-PCIDS scanner organizes its input and output memory in
16-bit increments. When you access the data in the controller, the data
is packed into 32-bit increments (DINTs).
16-bit increments. When you access the data in the controller, the data
is packed into 32-bit increments (DINTs).
A Logix5000 system is easier to program if you give each device its
own DINT or DINTs within the controller. To accomplish this with a
PCIDS scanner:
own DINT or DINTs within the controller. To accomplish this with a
PCIDS scanner:
• Allocate memory in 4-byte increments.
• This may result in some 16-bit words being left unused.
• This may result in some 16-bit words being left unused.
16 bits
16 bits
16 bits
Scanner Input Memory
Controller Output Data
Scanner Output Memory
Controller Input Data
16 bits
16 bits
16 bits