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PRESYS
| Instruments
3.0 - Operation
3.1 - Normal operation
The DCY-2050 and 2051 controllers are provided with two operational modes:
normal mode and configuration mode.
In normal operation mode we can further have the automatic operation mode and
the manual operation mode.
In the automatic operation mode (closed loop system) the controllers receive the
input signals, compare them with the set-points and automatically generate through
control algorithms the output signals which adjust the input signals to the set-points.
In the manual operation mode (open loop system) the user himself establishes
the values in output percentage to control the measured variables.
The selection between the automatic and manual modes is made through the
automatic/manual (A/M) key on the controllers front panel. When in the manual mode the
green LED indicating the manual state is illuminated.
The controllers normal mode, in which they operate most of the time, will be
named zero level. In this level the upper display can show: denomination of set-point 1
(SP 1), denomination of output 1 (OUT1), denomination of set-point 2 (SP 2),
denomination of output 2 (OUT2), value of input 1 (IN 1) and value of input 2 (IN 2). The
lower display can show: the value of set-point 1 (V_SP 1), the value of output 1 (V_OUT
1), the value of set-point 2 (V_SP2) and the value of output 2 (V_OUT 2). Whenever the
controllers are connected, they start a display indication of the last selection shown,
before being disconnected. In order to switch to other options, the UP, DOWN and
ENTER keys should be used, as illustrated in figure 10.
Figure 10, below, illustrates all those display possibilities at the operation level.
DCY-2050 and DCY-2051
Operation
Page 17
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