Emerson PNC001-A Series Important Product Information page 21

GFK-2573AB
Operational Note
PROFINET DCP – Direct
Connection indicates that no valid
Ethernet adapters are available for
PROFINET DCP discovery (must run
PME as Administrator to use this
feature)
PNC001-Ax Reset or Power
Supply Fault with PSA140
Monitoring Remote IO Device
Availability
Loss / Add of IO Device during
dual power up
Description
Beginning with PME 8.60, the PROFINET DCP tool requires elevation to administrator
privilege to run when it is launched by right-clicking on a PNC001. Since the PME
installation does not set up PME or any of its internal tools to run at the administrator
privilege level, you will have to inform Windows that you want it to run PME as an
administrator. There are two ways to do this:
1. Right-click on the PME icon (and any other shortcuts associated with PME) and select
properties. Then select the Compatibility tab and check the checkbox for Run this
program as an administrator.
2. Right-click on the PME icon and select properties. Then select the Advanced button and
check the checkbox Run as administrator. This method shows Run as administrator in
bold when you right-click on the icon in the future.
You may also launch the PROFINET DCP tool from the Utilities tab menu in PME. However,
this launch method does not provide full functionality of the tool. That is, it does not
compare I/O devices found to any configuration in the PME Project. Also, if PME was not
launched as an administrator, this method of launching the DCP tool requests the user's
permission to elevate access to administrator privilege.
These issues may occur in a system with a PNC001-Ax module and two IC695PSA140
Multifunctional 120/240 VAC, 125VDC 40W Power Supplies when either of the power supplies
are turned off and back on:
1. The PNC001-Ax resets and does not power back on.
2. The P/S Fault LED on PSA140 that was not powered off and back on turns
on and no power is supplied to the modules in the RX3i rack.
If this issue occurs, it may be resolved by turning both power supplies off and back on. This
issue only applies to the PNC001-Ax.
Applications using PROFINET IO should monitor the availability of remote IO devices and
take appropriate action if the device becomes unavailable due to a network connectivity
issue, power failure at the remote device, etc. PROFINET IO device status is available by
monitoring the Controller's All Devices Connected status bit, using the PNIO_DEV_COMM
function block, or monitoring the CPU's IO Fault Table for Loss of Device faults.
Individual IO modules within a PROFINET IO device should also be monitored so that
appropriate action may be taken if the IO module becomes unavailable. The status of input
modules may be monitored by enabling point faults and monitoring the fault contact
within the application. Outputs may be monitored by looping critical points to an input
module and verifying the output value.
If both IO Controllers of a PNSR system is powered up at the same time and attempt to
connect to redundant PROFINET IO devices at the same time, the second of the two
connection attempts will be rejected until the first connection completes. This rejection
will cause a Loss of IO Device fault. When the retry is attempted, it will succeed, and an
Addition of IO Device fault will be issued. This is an expected operation. If one system is
powered on slightly before the other, this condition does not occur.
Jul 2022
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