gefran 2500 User Manual

RATIO CONTROLLER
Settings
Level 1 display of ratio calculation starting with vers. 1.14
Set the following parameters:
“CFG” menu parameter SP.r = 4 (5) math function A (B)
“CFG” menu parameter M.A.t = 0 mandatory function mode
“Hrd” menu parameter Func.A = 7 (IN3 * C1.A)
“InP.3” menu parameter tYP.3 = x select remote input type
“Hrd” menu parameter C1.A = xx value of coefficient
(can be changed manually)
You have to enable remote condition “REM” of input IN3 (from key, from configured digital input or from serial).
N.B.: the ratio is also calculated automatically at Man/Auto switching and the value is written in C1.A
INSTALLATION PROCEDURE FOR LOAD CELL WITHOUT SAMPLE WEIGHT
There is a procedure that lets you calibrate the instrument without having to use a sample weight, but only with the characteri-
stic sensitivity parameter of the load cell.
The procedure is activated by means of Parameter tyP.x on the InP.x menu, set to 28 (or 30) in case of a unidirectional load
cell, or to 29 (or 31) in case of a bidirectional cell and TR load cell (“Roller Tension”).
Procedure
1. Go to the InP.x menu
2. Set tyP.x to 28 (or 29), 30 (or 31)
3. Set minimum scale in LoS.x
(for example,: “0” for unidirectional load cell, or -FS (Full Scale) for bidirectional load cell and TR load cell).
4. Set maximum scale in HiS.x
(with only one load cell = FS of cell; with more than one equal load cell set the sum of the FSs).
5. In parameter SGSE.x, set the value of “F.R.OUT” (sensitivity) printed on the plate of the load cell (in case of more than
one equal load cell in parallel, set the arithmetic average of the sensitivity).
6. The value shown on the “PV” display is the system tare.
Use parameter OFS.x (on the InP.x menu) to reset the value
(for example: for value 10.00 read on the PV, set OFS.x = -10.00).
As an alternative, you can reset the tare by using the “Reset tara Inx” function assigned to a digital input (parameters
dig.1 or dig.2) or to the front panel key (parameter but.3) on the “Hrd” menu.
“POWER OFF” FUNCTION
Typical application: protection of extruders in case of alarm.
The “power OFF” function is obtained by setting digital input code diG.x (1÷8) = 31.
Configure a second digital input (or front panel key) as MAN/AUTO.
Set the manual power value you want in parameter “AMP”.
When the digital input configured as “power OFF” becomes active, i.e., is put into ON state, it forces the control output to zero
in automatic and in manual.
Starting from automatic:
When the digital input configured as “power OFF” becomes active, i.e., is put into ON state, it forces the control output to
zero.
By putting the digital input configured as “power OFF” into OFF state, the instrument stays locked in “power OFF,” i.e., with
the output forced to zero.
To resume control, the instrument has to be switched manually to MAN, after which it resumes control of manual power star-
ting from zero.
The switch to automatic is restricted to the conditions set in parameter “M.A.t” (with regard to the value assumed by the set
point).
Starting from manual:
When the digital input configured as “power OFF” becomes active, i.e., is put into ON state, it forces the control output to
zero.
By putting the digital input configured as “power OFF” into OFF state, the instrument, already in manual, resumes from
manual condition starting from zero.
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gefran 2500 Specifications

General

Brand	gefran
Model	2500
Category	Controller
Language	English