JUMO AQUIS touch P 202580, Operating Manual

Page: 97 / 322

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8 Operation
8.5.3 Hold mode
The hold mode of a controller is activated in two ways:
•
Calibration of the actual-value input
• Hold signal for the individual controller (specified in the controller configura-
tion)
In the hold mode, automatic control is suspended. The controller generates the
preconfigured value as output level unless acceptance of the hold output is dis-
abled in the configuration. In this case, the output level is frozen.
Only the setpoint value can be changed in this operating mode. In the hold
mode, however, the setpoint value change has no effect. The changed setpoint
value takes effect only when the controller returns to the automatic control
mode.
The hold mode has priority over the manual mode. If the hold mode is activated
while the controller is in the manual mode, the controller changes from
manual mode to hold mode and then returns to manual mode when hold mode
is deactivated.
The hold output level is preset and the digital signal for
activating hold mode is set in the controller configuration.
v
Chapter 10.11 "Controller", Page 140
(1) Display of active hold mode
(2) "Manual entry" button for changing the current setpoint. The change to
the currently active setpoint is transferred to the controller parameters.
The output level, however, remains frozen during hold mode.
When external setpoint values are used, this button is hidden.
To configure external setpoint values:
v
Chapter 10.12 "Setpoint value configuration", Page 147
(1)
(2)