RSTI-EP PROFINET I/O Controller User Manual
Section 4
GFK-2571R
May 2021
PROFINET System Operation
95
If the iolan_controller01_L3 PROFINET Controller is communicating with the
versamax_pns01_L3 IO Device, the Bool variable L3_PNC01_PNS01_Status is set on. In a
simplex (non-redundant) system the value of the Primary output is the same as that of the
OK output. In a Hot Standby CPU Redundancy system, the Primary output sets the
L3_PNC01_Primary variable on when the iolan_controller01_L3 Controller is actively
controlling the versamax_pns01_L3 IO Device.
Figure 93: PNIO_DEV_COMM Example
4.7.3
Reset Smart Module for the PROFINET Controller
Service Request 24, Reset Smart
Module
7
,
can be used to reset a PNC001 module in the
PACSystems RX3i CPU rack. The result is the same as extracting the PNC001 module from
the rack then re-inserting it.
When the RX3i CPU encounters the Reset Smart Module service request in the application
logic, it issues a reset command to the specified module (in this case, a PNC001). The
PNC001 terminates all connections to PROFINET IO-Devices. When the PNC001 powers up
and re-establishes communications with the CPU, the CPU sends the appropriate
configuration to the PNC001, and the PNC001 re-establishes connections with all its
configured PROFINET IO Devices.
Note:
The Reset Smart Module request cannot be used to reset smart modules located in
remote nodes.
4.7.4
DO I/O for Remote IO Modules
In addition to the normal I/O updates that occur during the PACSystems CPU’s scan, the
application program in the CPU can use the DO I/O function to access the I/O data
associated with Remote IO Modules on the PROFINET network during the logic portion of
the CPU sweep. The DO I/O function can obtain or update the most recent I/O data that is
being consumed from or published to the Remote IO Module by the PROFINET IO Controller.
The DO I/O function can also be used to obtain data associated with the PROFINET
Controller itself.
It is important to remember that the I/O data being read or written by the DO I/O function
is data currently being stored by the PROFINET Controller within its memory. Executing a
DO I/O function from the CPU does not cause additional data to be produced or consumed
on the PROFINET NETWORK. Updates of the actual Remote IO Module I/O data occur during
the configured PROFINET cyclic scanning schedule. The DO I/O function provides the benefit
7
This Service Request is not supported by embedded PROFINET Controllers.
Содержание PACSystems RX3i
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