Allen-Bradley 1779-KFMR User Manual page 162

Chapter 10
Write block is a protected command. That is, if its destination is a PLC-2
programmable controller, it can only access an area of data table memory
designated by a memory access rung.
LINK — This two-byte field specifies the destination Data Highway II
link (000 — 377 octal) within the network for this remote command.
With only one Data Highway II link in the network, enter the LINK-field
value 000 octal.
NODE — This six-byte field specifies the destination node
(001 — 376 octal) within the destination link for this remote command.
The value of this field corresponds to the octal value you select with the
LINK-ADDRESS thumbwheel switches at each node interface.
USER — This one-byte field specifies the destination channel within the
destination node for this remote command.
In a remote command, these LINK, NODE, and USER fields combine to
fully specify the network address of the station which is the ultimate
destination of this remote command when it is initiated by the remote
station where it is stored.
SBQ (Source Block Quantity) — This one-byte field specifies the
quantity of blocks of memory to be read from or written to at the remote
source station which stores and then initiates the remote command. The
value in this field must be 01.
S SIZE (Source Size) — This two-byte field specifies the number of
bytes in the block of memory affected at the remote source station which
stores and then initiates the remote command. The size value must be
even (02 through FF hexadecimal).
S ADDR (Source Address) — This field specifies the logical starting
address of the block of memory affected at the remote source station
which stores and then initiates the remote command. The size of this field
is variable (2 through 35 bytes). The first byte specifies the levels of
addressing that are specified in the remaining bytes of the field. Refer to
Appendix A for an explanation of logical addressing.
DBQ (Destination Block Quantity) — This one-byte field specifies the
quantity of blocks of memory to be read from or written to at the ultimate
destination station which executes the remote command. The value of
this field must be 01.