NIVELCO UNICONT PMG-500, User And Programming Manual, Page: 19 / 41

pmg511en21p01 19
Ramp operation diagram
SV
SV
SV
SV
SV
SV
RAMP SV
= PV
Altered
SV
RAMP SV
RAMP SV
= PV
RAMP Start
Change point Change point
RAMP Start
RAMP time unit (s/m/h)
RAMP time unit (s/m/h)
RAMP time unit (s/m/h)
RAMP time unit (s/m/h)
RAMP setting values
(1…9999 digit)
RAMP setting values
(1…9999 digit)
RAMP
activation zone
RAMP
activation zone
RAMP
activation zone
RAMP
activation zone
Time
Time Time
Time
Activating RAMP, when RAMP is off
Changing SV or RAMP parameter when RAMP is on
5.5.7 Auto/Manual control settings
The automatic mode is for the temperature to reach SV with the MV value calculated by the PID control.
The purpose of the manual mode is for the temperature to reach SV with a user-defined MV value.
Note: In manual mode, parameter settings can only be viewed and cannot be changed (except for lock parameters). If the
[DI-1] digital input terminal function is set to automatic / manual [MAN], the button and automatic/manual changeover
will not work with communication. If the unit is turned on after a power failure or shutdown, the previous mode (automatic
or manual) will be retained.
It is possible to switch to manual mode during STOP state. It is also possible to switch between automatic / manual
mode during adjustment, but automatic tuning will stop if manual control is switched on during automatic tuning.
If a sensor break alarm occurs in [SBA] normal mode, the MV [Er MV ] sensor fault will occur. The MV settings for
manual and automatic control can be changed in this state.
Operational priority: Manual control > Stop > Open (sensor disconnected)
5.5.7.1 Switching Between Manual/Auto Control
Switching to manual mode for standard control (heating or cooling):
– In ‘Normal’ mode, press the button, and the device will switch to MV monitoring mode. The SV display
shows H (heating control) or C (cooling control) and shows MV , indicating the start of MV monitoring.
– If any of
is pressed during
MV monitoring, the MAN indicator will turn on, and the lowest
digit (100 digits) will flash to indicate that the manual control is active.