General Description; Profile - gefran 3850T Use And Installation Manual

1.1.

Profile

The 2850T and 3850T multi-purpose controllers designed
to control the temperature in production processes (heat
treatment, kiln and autoclave management, etc.) used in
different industrial sectors such as automotive, food, metal-
works, etc.
The controllers consist of three elements: the operator in-
terface with touch screen display and keys, the I/O module
group for connection to plants and machinery and the con-
nection cable between the interface and the module group.
The two controllers share the same main features and the
same functions. The differences are listed in paragraph
"1.2. Model differences" on page 10.
The color touch screen display (3.5" for the 2850T model
and 7" for the 3850T model) allows the operator to easily
and quickly interact with the controller, managing actions
and parameters.
Access to the main controller functions and navigation
between pages is made easier thanks to its function keys
(6 for model 2850T and 10 for model 3850T), some of which
are customisable.
Customized pages may be configured directly on the dis-
play, even without a PC or external software. This option al-
lows you create optimised graphic interfaces to control the
machinery used. A graphic symbol library is provided for
this purpose (buttons, bargraph, data display, etc.) that can
be set and linked to the controller variables. You may also
import images, such as representations of the machinery or
of the system's operating diagram, to be used as a back-
ground, to make control even more intuitive for operators.
Controllers can control different PID (up to 8 for model
2850T and up to 16 for model 3850T) fully configurable.
Each PID can be used as a control for a single loop, a valve
or a ratio control, it can be connected to the profile pro-
80703B_MHW_2850T/3850T_02-2019_ENG
1.

GENERAL DESCRIPTION

2850T
1. GENERAL DESCRIPTION
grammer or be used as a cascade controller.
Tuning is performed through advanced algorithms that
ensure stable and accurate temperature control, avoiding
exceeding set limits or having unstable process control
even in critical heat or fast motion processes.
The setpoint profile programmer allows you to set the
programs to manage heat treatment cycles. The profile is
the set of segments that describe the setpoint curve. You
can create up to 200 (model 2850T) or 250 (model 3850T)
programs, stored internally, each of which can contain up to
50 segments.
Each program lets you set up to four setpoint profiles. A de-
scriptive message, 16 input events (IN), 16 outbound events
(OUT), the setpoint value and the HBB alarm threshold can
be set for each program.
You can launch up to four programs simultaneously with
the 2850T model and 8 programs simultaneously with the
3850T model, each of which can handle up to 4 synchro-
nous profiles.
The profile programmer can be set in synchronous mode
(all profiles are run with a common time base) or asynchro-
nous (each profile can be run with an independent time
base). The asynchronous mode is obtained by running
different programs simultaneously.
The available logical operators (AND, OR, Timer, Counter
etc.) allow you to create custom logic operating sequenc-
es integrated with , thus obtaining complete and flexible
machine control.
The available settable mathematical functions (addition,
multiplication, division, minimum or maximum value, algo-
rithms, etc.) can be used associated with process values as
analog channels and virtual channels, to manage advanced
controls, such as ratio controls or custom mathematical
formulas.
3850T
9