GFK-2721A
Chapter 5 Maintenance Mode
5-3
5
Exiting Maintenance Mode and Restoring Operation
1. With the PNS still in Maintenance mode, if the PNS was disconnected from the
VersaMax stick, reconnect it.
2. Apply power to any Power Supply Boosters that were powered down.
3. Press the MAINT pushbutton for at least 3 seconds.
4. When the MAINT LED stops blinking, indicating the PNS has transitioned to Normal
mode, release the pushbutton.
5. Download a configuration to the PNS device.
When the PNS returns to Normal Mode:
The MAINT LED stops blinking.
The PNS applies power to the rest of the modules in the VersaMax stick (those that
are not powered by a Power Supply Booster).
When the PNS exits Maintenance Mode and re-enters Normal Mode, it will not
configure modules in the stick using a previously received Configuration. Instead,
the modules in the stick will be controlled in the same manner as when the PNS has
just powered up. When an AR is established, the PNS will configure the modules
using the data provided via that AR.
Upon exiting Maintenance Mode, the PROFINET Scanner waits to receive its
configuration from the IO Controller.
The PNS keeps its Ethernet switch functional, and (if so configured) continues to
support the Media Redundancy protocol.
Maintenance Mode Retentiveness through Power Cycle
The VersaMax PNS module will retain the current mode across power cycles. If the module is
in Normal Mode and power is lost, the module will be in Normal mode when power is restored.
Similarly, if the module is in Maintenance mode when power is lost, the module will be in
Maintenance mode when power is restored.
