Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 36)

 

3-14 Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
Troubleshooting and Maintenance Manual (AADvance
Controller)
When a fault exists on a channel, the module will report safe values for that channel and the
Discrepancy status variable reports TRUE.
Simplex Module Configuration
When a simplex module channel fault exists for longer than the module PST the channel indicates a
fault condition and the following status values are reported:
 Channel State = 7
 Channel Input State = FALSE
 Line fault = TRUE
 Discrepancy = TRUE
 Channel fault = TRUE
 Channel reports a voltage value = 0
Dual Module Configuration
When the reported values between modules in digital/analogue modules of a dual configurations
diverge by more than twice the safety margin specification for a period of two application scans, that is
by the following values:
 Digital input modules diverge by more than 2.0V dc
 Analogue input modules diverge by 400µA.
the lower of the two values will be reported and a discrepancy flag is set and the configuration
degrades to a simplex operation.
Triple Module Configuration
When the reported values between modules in digital/analogue triple configuration diverge by more
than twice the safety margin specification for a period of two application scans, that is by the following
values:
 Digital input module by more than 2.0V dc
 Analogue input module by 400µA.
the lower of the two values will be reported and a discrepancy flag is set and the configuration
degrades to a dual operation.
Output Channel Shutdown
In shutdown mode the output module drives its outputs to their configured shutdown settings; for
example, de-energized or hold last state. The shutdown mode and channel drive states remain in place
until new command states are received from a running application, or until the module loses power.