Power-Up And Reset (Pnc001 Module); Module Restart - GE PACSystems RX3i User Manual

Chapter 5. Diagnostics
5.1

Power-up and Reset (PNC001 Module)

During power-up and reset, the PNC001 module runs diagnostics and initializes its hardware components.
When the necessary hardware components have been initialized and tested, the PNC001 transitions to either
normal operation or firmware update mode.
As the PNC001 module transitions to normal operation, it adds a startup entry that provides a reason for the
restart in its Local Log table. This entry is normal.
5.1.1

Module Restart

The PNC001 restarts if it receives a Reset signal from the PACSystems RX3i CPU, if the Restart Pushbutton is
pressed, if the restart or default command is issued from the Command Line Interface (refer to the PROFINET
Controller Command Line Interface Manual, GFK-2572), or if the hardware watchdog timer expires. More details
on each type of restart are given below.
When the PNC001 is restarted, it retains any entries in its Local Log table and its non-volatile configuration
parameters. Any debug data in non-volatile storage can be viewed from the Command Line Interface using the
log or show log commands.
5.1.1.1 Restart Triggered by Reset Signal from the PACSystems CPU
The PACSystems RX3i CPU resets/restarts a resident PNC001 module if:
•
The application logic executes SVC_REQ #24, specifying the rack and slot of a PNC001 module.
•
The RX3i CPU loses communications with the PNC001.
•
The PNC001 requests the RX3i CPU to reset / restart it (for example, as a result of a restart or default
Command Line Interface command execution).
Note: This feature applies to PNC001 modules, but does not apply to CPUs with embedded PROFINET
Controllers.
5.1.1.2 Restart Triggered by Restart Pushbutton
Pressing and releasing the Restart pushbutton on the PNC001 module resets the hardware, turns OFF all LEDs
briefly and initiates the module's power-up sequence. The Restart pushbutton may also be used to restart the
module if the OK LED is blinking an error code upon hardware or runtime failure, or if the module locks up.
5.1.1.3 Restart Triggered by Restart and Default Command
Issuing a restart or default command from the Command Line Interface causes the PNC001 to restart. Modify-
level privileges are required to issue these commands.
5.1.1.4 Restart Triggered by Hardware Watchdog Timer
The PNC001 maintains a hardware watchdog timer that will restart the module in the event that it is unable to
carry out its normal processing. The PACSystems RX3i CPU is not able to access the PNC001 module's shared
memory while the PNC001 is restarting.
After the restart, the module's Local Log table is restored from NVRAM. The PNC001 logs a Watchdog Timer
Expired fault in the RX3i CPU's IO Fault Table, and a Restart Event in its Local Log table.
102 PACSystems* RX3i & RSTi-EP PROFINET IO-Controller User Manual GFK-2571N