Allen-Bradley MicroLogix 1200 Reference Manual page 313

Data Table Address/Offset
This variable defines the starting address in the target controller. The data
table address is used for a 500CPU and PLC5 type messages. A valid
address is any valid, configured data file within the target device whose
file type is recognized by the controller. Valid combinations are shown
below:
Message Type
500CPU and PLC5
(1) 500CPU write RTC-to-Integer or RTC-to-RTC only. Applies to MicroLogix 1200 Series B and later, and 1500 Series B
and later only.
The data table offset is used for 485CIF type messages. A valid offset is
any value in the range 0 to 255 and indicates the word or byte offset into
the target's Common Interface File (CIF). The type of device determines
whether it is a word or byte offset. MicroLogix controllers and SLC
processors use word offset; PLC-5 uses byte offset.
Local Node Address
This is the destination device's node number if the devices are on a
DH-485 (using 1761-NET-AIC), DeviceNet (using 1761-NET-DNI), or DF1
Half-Duplex network.
To initiate a broadcast message on a DH-485 network, set
NOTE
the local node address to -1.
Local/Remote
This variable defines the type of communications that is used. Use local
when you need point-to-point communications via DF1 Full-Duplex or
network communications such as DH-485 (using 1761-NET-AIC),
DeviceNet (using 1761-NET-DNI), or DF1 Half-Duplex.
Communications Instructions
Local File Type
O, I, B, N, L
T
C
R
(1)
RTC
21-13
Target File Type
O, I, S, B, N, L
T
C
R
N, RTC
Publication 1762-RM001C-EN-P