Bently Nevada 3300/01 Series, Руководство по эксплуатации, Страница: 37 / 78

System Monitor
Command Name
Command Code Function Code
Diagnostic Counters Reset 6 7
Diagnostic Read
6 1
Diagnostic Status
6 3
Diagnostic Loop 6 0
Unprotected Read 1
16 I PROTOCOL SPECIFICATIONS
ALLEN BRADLEY PROTOCOL MESSAGE TYPES
80175-01
For a complete description of the Allen Bradley message formats refer to the Allen Bradley
protocol document listed in the forward.
The messages that may be transmitted and received by the Serial Interface will be selected from
the Allen Bradley basic command set. They are
DIAGNOSTIC COUNTERS RESET
This command resets to zero all diagnostic counters in the interface. (See diagnostic read below.)
DIAGNOSTIC READ
During operation of the interface, the firmware will keep track of several events. When a particular
event occurs, a counter associated with that event will be incremented. These counters can be
read
by issuing a diagnostic read command. The Allen Bradley interface module must be
configured t o pass o n all diagnostic messages o r the Serial Interface will not receive the
command. Counters are 16 bit counters and all will wrap around to zero when they overflow.
The counters that will be implemented by the Serial Interface are
1. 16-bit counter of the number of times a communications error occurred in a received
message.
2. 16-bit counter of the number o f times the backplane data was rejected because the
Communications Processor control signals were unstable.
3. 16-bit counter of the number of times a scan overflow occurs. This is detected when a
change in the backplane mux lines occur while the interface is waiting for the last mux
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