Rockwell Automation T80020 Application Note Diagnostic Procedures - Manual (Page 11)

Trusted TM
AN-T80020 Diagnostics Procedure
Issue 12 Feb 11 AN-T80020 11
Other data on Equipment Definitions
All modules provide information on temperature, in many cases at several points throughout the
module. Note that these temperatures are ranged differently, e.g. on the processor 1°C = 10 counts,
but on the I/O modules, 1°C = 256 counts. The operating range of all native 8000 series modules
(except the Gateway module which contains a PC104 computer) is –5 to 60°C. Since there is no fan
fail monitoring, there should be alarms set on overtemperature in the application.
There is also detailed information on internal voltages and currents at many points in each module,
measured in millivolts and milliamps. This covers both internal measurements and field I/O condition.
These should approximate to the stated voltage (e.g. 24V or 8V) or show that currents are shared
evenly and not overloaded.
There are channels left spare for condensation monitors. These are not used. The main processor
definition (TTMRP) gives some digital system status information including the number of locked
variables in the application, a variety of digital system alarms including the System Healthy LED state,
and the health of the active and standby processors.
Each I/O module definition provides details of the state and condition of each channel, with
discrepancy alarms for where the triplicated slices disagree on the state of an I/O point.
All of the above data may be connected to in the application and used for diagnostic alarms and
actions. The data is described in the Product Descriptions for each module.