Overview Of Loop Controller L3 - Toshiba V Series User Manual

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Chapter 1 Overview of
Loop Controller L3
The loop controller L3 is a Toshiba Integrated Controller V series control station which
uses Ethernet control LAN. The L3 controller is composed of an L3 CPU module
(L3PU11/L3PU21), an Ethernet module (EN7 module) and various IF modules (all of
which constitute a main unit or basic unit), and I/O modules. The L3 CPU module has a
capacity for 512K steps of program and is capable of executing up to 256 loops of PID,
sequence and batch controls. With the serial bus duplexed (for standard specification)
for redundancy and the main unit adaptable to duplex configuration, the L3 controller is a
highly reliable control station. An object-oriented tool in compliance with the IEC61131-3
is available for control-function engineering, enabling efficient development of application
programs using the Ladder Diagram (LD), Function Block Diagram (FBD), and
Sequential Function Chart (SFC).
Figure 1-1 Appearance of the L3 Main Unit
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