Emerson PNC001-A Series User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 3
GFK-2222AK October 2019
CPU Configuration 61
Fault Parameters
System Bus Error
(Fault group 12.) When a bus error occurs on the backplane, system variable
#SBUS_ER (%SA32) turns ON.
(To turn it OFF, cycle power on the main rack.)
Default: Fatal.
I/O Controller or
I/O Bus Fault
(Fault group 9.) When a Bus Controller reports a bus fault, a global memory fault, or
an IOC hardware fault, system variable #IOC_FLT (%SA22) turns ON.
(To turn it OFF, cycle power on the rack containing the module when the
configuration matches the hardware after a download.)
Default: Diagnostic.
System
Configuration
Mismatch
(Fault group 11.) When a configuration mismatch is detected during system power-
up or during a download of the configuration, system variable #CFG_MM (%SA9)
turns ON.
(To turn it OFF, power up the PLC when no mismatches are present or download a
configuration that matches the hardware.)
This parameter determines the fault action when the CPU is not running. If a system
configuration mismatch occurs when the CPU is in RUN Mode, the fault action will be
Diagnostic. This prevents the running CPU from going to STOP/FAULT mode. To
override this behavior, see Configuring the CPU to Stop Upon the Loss of a Critical
Module.
Default: Fatal.
Fan Kit Failure
(Fault group 0x17.) When a fault is detected in the Smart Fan kit, system variable
#FAN_FLT (%SA7) turns ON.
(To turn a fan kit fault OFF, clear the Controller fault table or reset the PLC.)
Default: Diagnostic.
Recoverable Local
Memory Error
Redundancy CPUs only. (Fault group 38) Determines whether a single-bit ECC error
causes the CPU to stop or allows it to continue running.
Choices: Diagnostic, Fatal.
Default: Diagnostic.
Note: When a multiple-bit ECC error occurs, a Fatal Local Memory Error fault (error
code 169) is logged in the CPU Hardware Fault Group (group number 13).
CPU Over
Temperature
(Fault group 24, error code 1.) When the operating temperature of the CPU exceeds
the normal operating temperature, system variable #OVR_TMP (%SA8) turns ON.
(To turn it OFF, clear the Controller Fault Table or reset the PLC.)
Default: Diagnostic.
Controller Fault
Table Size
(Read-only.) The maximum number of entries in the Controller Fault Table.
Value set to 64.
I/O Fault Table Size
(Read-only.) The maximum number of entries in the I/O Fault Table.
Value set to 64.
3.2.7.1 Configuring the CPU to Stop Upon the Loss of a Critical Module
In some cases, you may want to override the RUN Mode behavior of the System
Configuration Mismatch fault. A given module may be critical to the PLC’s ability to

Emerson PNC001-A Series Specifications

General

Brand	Emerson
Model	PNC001-A Series
Category	Controller
Language	English