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AUTOMATIC / MANUAL CONTROL
By means of the digital input function you can set the controller in MAN (manual) and set the control output to a
constant value changeable by means of communication.
When returning to AUTO (automatic), if the variable is within the proportional band, switching is bumpless.
2
0v. p
132 - 471
140
diG.
618
diG. 2
1
AUTO/MAN
bit
305
HOLD FUNCTION
The process variable value and the setpoints remain "frozen" for the time the digital input is active.
By activating the digital input with the Hold function when the variable is at values below the setpoint, a setpoint
memory reset de-energizes all energized relays and resets all memory latches.
140
diG.
618
diG. 2
64
HOLD
bit
MANUAL POWER CORRECTION
With this function (available on models with CV diagnostics option), you can run a correction of power delivered in
manual based on the reference line voltage (riF). The % value of the (Cor) is freely settable and acts in inverse proportion.
The function is activated/deactivated by means of parameter SP.r.
Example: with the following settings: Cor = 10%; riF = 380; SP.r = value + 8; instrument in manual; line voltage 380
VAC, manual power set at 50%, following a 10% increase in line voltage, 380V + 10% (380V) = 418V, there is a decrease in
set manual power equal to the same % of change: 50% - 10% (50%) = 45%.
To use this function, the controller must have a CT (current transformer) and a VT (voltage transformer).
N.B.: the % change in manual power is limited to the value set in parameter "Cor".
The maximum manual power correction is limited to ± 65%.
505
rif
Compensation of the voltage transformer read to maintain output
power at a constant level.
506
(or
18
SP. r
136 - 249
80397M_MSW_GFX4-GFXTERMO4_08-2018_ENG
Value of control outputs
R
(+Heat / -Cool)
Digital input function
R/W
R/W
Digital input function 2
OFF = Automatic
R/W
ON =Manual
R/W
Instrument state
R/W
Digital input function
R/W
Digital input function 2
OFF = Disable hold
R/W
ON = Enable hold
R/W
Line voltage
Correction of manual power based on
R/W
line voltage
Remote setpoint
R/W
(SET gradient for manual power cor-
rection)
(W – only in manual mode at address 252)
See: Table of digital input functions
See: Table of instrument settings
See: Table of digital input functions
0.0 ...999,9
0,0 ...100,0 %
Setpoint table
Type of remote set
0
Digital (from serial line)
1
Digital (from serial line)
2
Auxiliary input
3
Auxiliary input
+4 set gradient in digit/sec.
+8 correction of manual power based on line voltage
+16 disable saving of local setpoint _SP
+32 disable saving of local manual power (at switch-off returns to last value
saved)
Absolute/Deviation
Absolute
Deviation local set (_SP o SP1 o SP2)
Absolute
Deviation set (_SP o SP1 o SP2)
0
0
0
0
0,0
0,0
0
47
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