Allen-Bradley 1444-TSCX02-02RB User Manual page 265

Method
Summary status bits
Discrete status bits
Module Status is composed of a set of assemblies that communicate a
comprehensive hardware and functional status of a Dynamix monitor system.
While this communication allows tremendous capability and insight into the
module performance, it can be more than is necessary for some applications.
And if the intent is to present Status on an HMI, it can be difficult to
determine exactly what to present. The following table provides guidance on
three different solutions to how to "monitor status".
Values
Bits 27 and 28 of DSP Status (Table 54)
Processor Status (Table 55)
As listed in the individual status assemblies
The data type for each attribute is either a 'SINT' (8 bits), an 'INT' (16 bits),
or a 'DINT' (32 bit). In each case, the state of the individual bits as provided in
Table 51 defines status. It is possible for multiple bits to be set.
Summary Status Tags
The two summary tags are intended to provide a simple presentation solution
that gives meaningful indication of fault for any given module application.
The Summary Tags do not simply roll up the status of some subset of other
fault bits because many fault indicators (the other tags) are dependent on the
specific configuration applied (so can be set or unset normally). Consequently,
the logic that is used to drive the Summary Tags is determined at configuration.
Also, in many cases a physical hardware problem can cause an issue where it is
the symptom rather than the cause that is indicated. And in some cases there
can be multiple causes that can result in the same symptom. Consequently,
when fault indication is provided by a summary tag it can be necessary to
interrogate other status indicators to resolve a specific problem.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Operate the Module
Description
Module status includes two summary bits, one for the
Dynamic Measurement Module and one for any connected
expansion modules. See Summary Status Tags on
page 265.
In many cases, monitoring just these two bits is sufficient
to provide indication of the general status of the module
and any connected expansion modules.
In some applications, it is necessary or appropriate to
present one or more of the discrete status bits.
In most cases, the discrete bits needn't be monitored
except if there is a problem. When there is a problem, the
discrete bits aid in the investigation or the assessment of
the problem.
Chapter 10
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