DL205 User Manual, 4th Edition, Rev. D
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Chapter 3: CPU Specifications and Operations
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DL250–1 CPU Features
The DL250–1 replaces the DL250 CPU. It offers all the DL240 features, plus more program
instructions and a built–in Remote I/O Master port. It offers all the features of the DL250 CPU
with the addition of supporting Local expansion I/O. It has a maximum of 14.8K of program
memory comprised of 7.6K of ladder memory and 7.2K of V-memory (data registers). It
supports a maximum of 256 points of local I/O and a maximum of 768 I/O points (maximum
of two local expansion bases). In addition, port 2 supports up to 2048 points if you use the
DL250–1 as a Remote master. It includes an internal RISC–based microprocessor for greater
processing power. The DL250–1 has 240 instructions. The instructions are in addition to
the DL240 instruction set which includes drum timers, a print function, floating point math,
PID loop control for 4 loops and the Intelligent Box (IBox) instructions.
The DL250–1 has a total of two built–in communications ports. The top port is identical to
the top port of the DL240, with the exception of the DirectNet slave feature. The bottom port
is a 15–pin RS-232/RS-422 port. It will interface with DirectSOFT and operator interfaces,
and provides DirectNet and Modbus RTU Master/Slave connections.
DL260 CPU Features
The DL260 offers all the DL250–1 features, plus ASCII IN/OUT and expanded Modbus
instructions. It also supports up to 1280 local I/O points by using up to four local expansion
bases. It has a maximum of 30.4K of program memory comprised of 15.8K of ladder memory
(saved on flash memory) and 14.6K of V-memory (data registers). It also includes an internal
RISC–based microprocessor for greater processing power. The DL260 has 297 instructions.
In addition to those in the DL250–1 instruction set, the DL260 instruction set includes table
instructions, trigonometric instructions and support for 16 PID loops.
The DL260 has a total of two built–in communications ports. The top port is identical to the
top port of the DL250–1. The bottom port is a 15–pin RS-232/RS-422/RS-485 port. It will
interface with DirectSOFT (version 4.0 or later), operator interfaces, and provides DirectNet,
Modbus RTU Master/Slave connections. Port 2 also supports ASCII IN/OUT instructions.
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