Rockwell Automation 2711E PanelBuilder 1400e Modbus Communications - Manual (Page 44)

6–7 Defining Tags
Publication 2711E-6.12 – August 1997
Reference Description Data Access Address Type
4 Output Holding
Register word read and
write Use to store numerical (decimal or
binary) information or to send the
information to an output module.
6 Extended
Memory
Register access
through Logic
Program only Use to store information in an extended
memory area. Only available in
controllers with 24 bit CPUs that
support extended memory such as the
984B, E984-785, and Quantum series
of controllers.
Addressing Syntax
For analog tags, the addressing syntax is as follows:
Addressing Syntax for Devices Using 5-digit Addressing:
Reference Operations Addressing Syntax
0 bit
read and write 0bbbb where
bbbb = bit 0001 to 9999 (decimal)
and bbbb must align on word boundaries
(e.g. 00001, 00017, 00033)
1 bit
read only 1bbbb where
bbbb = bit 0001 to 9999 (decimal)
and bbbb must align on word boundaries
e.g. 00001, 00017, 00033)
3 word
read only 3wwww where
wwww = word offset 0001 to 9999 (decimal).
Bit offsets are not supported.
4 word
read and write 4wwww where
wwww = word offset 0001 to 9999 (decimal).
Bit offsets are not supported.
Addressing Syntax for Devices Using 6-digit Addressing:
Reference Operations Addressing Syntax
3 word
read only 3wwwww where
wwwww = word offset 00001 to 65535 (decimal).
Bit offsets are not supported.
4 word
read and write 4wwwww where
wwwww = word offset 00001 to 65535 (decimal).
Bit offsets are not supported.