Ametek MP3 SCR DeviceNet Head, Hdr Hmi Manual

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is the default for the MP3 controller and causes this control to behave the same as a
physical rotary switch with locking potentiometer.
Alternatively, <Local Setpt NV> may be reconfigured to zero. This will remove the
non-volatile behavior of this control and the NV will not appear in the corner. Such a
setting will cause the rotary switch to reset to the Auto setting and cause the manual
setpoint to reset to zero whenever logic power is removed and restored to the
MP3/HMI units.
The important fact to remember is that this control may be set to be volatile or non-
volatile, depending upon the application, and that the NV in the corner always
confirms the current configuration.
There are four important items in this view of the Run/Stop rotary switch.
First, a touch controlled Auto/Manual Run/Stop rotary switch is available to
switch the control from automatic to manual. The MP3 Controller ladder logic
requires a run command from the controlling source. Absent any digital control,
the controller uses the configuration value of <AutoRun>. If <AutoRun> is true
(1), the unit is capable of running when powered up. DeviceNet or a local digital
panel may take over this function. If <AutoRun> is false, DeviceNet or a local
digital panel MUST provide the needed run command.
When Run/Stop is in the Auto position, there are two indicators above it. Combined,
these two indicators will show the controlling object and whether the command is to
run or stop.
AutoRun control - If the top indicator says AutoRun Controls, the lower indicator
will display either AutoRun=Run or AutoRun=Stop.
Network (DeviceNet) control – If the bottom indicator says Network controls, the top
indicator will display either NetCtrl Stop or NetCtrl Run.
Manual Run/Stop may be selected by touching the rotary switch to change it to the
Man (manual) position. When in the Man position, the space above it is replaced
with a local Run/Stop Manual control switch. The local manual run/stop control
overrides <AutoRun> and DeviceNet controls.
NV – The NV in the corner of the Run/Stop rotary switch indicates the
configuration value of <Local Control NV>. If <Local Control NV> is true (1),
the settings of these two switches are non-volatile and will return to their last
settings if logic power is removed and restored to the MP3/HMI pair. This is the
default configuration for <Local Control NV> and causes the switches to behave the
same as traditional hardware switches.
Alternatively, <Local Control NV> may be changed to false (0). In this case, switches
will always reset to Auto and Stop if logic power is removed and restored.
There are applications for both methods and the NV in the corner is visual
confirmation of the volatility setting of the Run/Stop control.