ProSoft Technology MVI46-DNP - Manual (Page 97)

Reference MVI46-DNP ♦ SLC Platform
Master/Slave Communication Module
ProSoft Technology, Inc. Page 97 of 143
August 23, 2007
Example Address Word Data Address Variable Name Description
N11:53 53 M1: .1589 DNP Master Length
Error Count (Physical
Layer Error) This value counts the number of times an
invalid length byte is received. If the length of
the message does not match the length value in
the message, this error occurs.
N11:54 54 M1: .1590 DNP Master Bad CRC
Error Count (Physical
Layer Error) This value counts the number of times a bad
CRC value is received in a message.
N11:55 N11:56 55 to 56 M1: .1591 M1:
.1592
Program Scan Counter This value is incremented each time a program
scan occurs in the module. The double-word
value can be used to determine if the module is
functioning and at what rate.
N11:57 N11:58 57 to 58 M1: .1593 M1:
.1594
Free Memory This value indicates the amount of memory
available in the unit. This memory is located in
the far heap of the module.
N11:59 59 M1: .1595 Reserved Future Use
N11:60 to N11:119 60 to 119 M1: .1596 to
M1: .1655
Error List Data Error List of log. The following topic contains a
complete list of error codes returned here.
N11:120 120 M1: .1656 Floating-point Input
Event Count
This value represents the number of event
messages generated from the Floating-point
input database.
N11:121 121 M1: .1657 Double Floating-point
Input Event Count This value represents the number of event
messages generated from the double input
database.
N11:122 122 M1: .1658 Number of Event
Messages to Send to
Processor from Master
Driver This value represents the number of event
messages waiting to be processed.
N11:123 123 M1: .1659 Event Message Buffer
Overflow This flag will be set to 1 if the event message
buffer overflows. If the value is set to 0, the
buffer is not overflowed.
N11:124 to
N11:159 124 to
159 M1: .1669 to M1:
.1695 Reserved Reserved for future use.
5.6.2 Module Error Codes – 60 Word Error List
If the module's program encounters an error during execution, it will log the error
to the error list. This list is transferred to the M1: file in elements 1596 to 1655.
The SLC ladder logic should be programmed to transfer this M1: file data to a
data table in the SLC. The tables below list the error codes generated by the
program with their associated description. Use the errors to help determine
where problems exist in the system.