Adding A Pac8000 Profinet Scanner To A Lan; Configuring Pac8000 Profinet Scanner Parameters - GE PAC8000 series User Manual

Adding a PAC8000 PROFINET Scanner to a LAN

3.2
Use the PROFINET IO configuration tool to add a PNS module to the LAN. This process may
include importing the PNS module's GSDML files. If necessary for your application, change
the settings of the PNS module's configurable parameters listed below.
3.2.1

Configuring PAC8000 PROFINET Scanner Parameters

The PROFINET IO Scanner provides 64-bits of status data and receives 16-bits of output
control data. These should be mapped to the IO-Controller's memory.
The IO-Controller determines the operation of inputs when the PNS is unable to provide
them. This typically happens when the PNS is not powered on, connected to the network, or
there is a network or configuration issue such that the IO-Controller cannot reach the PNS.
The IO-Controller may support defaulting inputs to fixed or configurable values or holding the
last known good state of inputs until connectivity is restored (Based on controller
configuration parameters).
The PNS has a single parameter on slot 0, subslot 1 that specifies the action the PNS will
take if a fatal error occurs. By default, the PNS module LEDs blinks a fault code if a fatal error
occurs and the output modules are forced to go into failsafe state (if configured so). This can
be changed to cause the PNS to restart instead.
The network parameters of the PNS (IP Address, subnet mask, and gateway IP) should
either be configured to match the fixed parameters assigned to the PNS using a DCP Tool or
to what the IO-Controller should assign during the startup of communications between the
PNS and IO-Controller. If the network parameters assigned by the DCP tool are different from
the configuration in the IO-Controller and the IO-Controller is configured to assign them to IO-
Devices, then when the IO-Controller assigns them as a temporary setting, the settings
previously stored from the DCP tool are lost. On a reset, the IO-Device is set to factory
default values (0.0.0.0/0.0.0.0/0.0.0.0).
The rate of data exchange is usually configured on the PNS in configuration tools. The PNS
supports update rates from 1ms to 512ms. The correct setting for each device can depend on
the dynamics of the equipment being controlled, the network loading on the PROFINET-IO
LAN, and the loading of the IO-Controller. It is possible to have better performance at 4ms or
greater periods than at 1ms, depending on the overall system requirements, design, and
loading.
3.2.1.1 Configuring PAC8000 PROFINET Scanner for PROFINET System Redundancy
The PAC8000 PNS supports PROFINET System Redundancy feature (PROFINET V2.3
Type S2 System Redundancy). This feature allows PNS to be part of a Hot-Standby (HSB)
CPU Redundancy system as shown below. In the HSB redundancy system, the two IO
controllers, based on their mutual agreement, makes primary and backup AR (application
relationship) connections with the PNS. One controller acts as a primary and the other acts
as backup. Once the connection is made, the PNS exchanges data only with the primary
controller.
In the HSB system, the CPUs/HOSTs continuously monitors the health status of connection
between the primary controller and PNS. If the CPUs finds the primary connection unreliable
at any point of time, it switches over the primary connection ownership to the backup
controller and commands PNS to recognize this change. The PNS then recognizes this
change and will immediately start the data exchange with the new primary controller
(previously backup controller).
GFK-2839B
PAC8000* IO PROFINET Scanner User's Manual–September 2017
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