ProSoft Technology MVI94-DNP - Manual (Page 57)

MVI94-DNP ♦ Flex I/O Diagnostics and Troubleshooting
DNP 3.0 Server over Ethernet Communication Module User Manual
ProSoft Technology, Inc. Page 57 of 131
December 17, 2010
4.6 Error Status Data
The module error/status data areas are discussed in this section. Three sets of
data are available with this type of data: Error/Status Data, Slave Status Data
and Command Error List Data. Each of these datasets are discussed in the
following topics:
4.6.1 Error Status Data
This data is provided to the processor using blocks 200 to 210 and is available
for viewing using the configuration/debug port option. The module transfers this
data to the processor at the end of each scan of normal data-block transfer. Each
block contains 6-words of data. Ladder logic should be written to place the data
received into a user data file. The following table describes the block numbers
and data received in each block:
Word Block
Number Block
Offset Variable Name Description
0 200 2 Current DNP Slave Port
status
This value represents the current value
of the error code for the port. This value
will only be valid if the port is
configured as a slave. The possible
values are described in the application
documentation.
1 200 3 DNP Slave Port last
transmitted error code
This value represents the last error
code transmitted to the master by this
slave port.
2 200 4 DNP Slave Port total
number of message
frames received by slave
This value represents the total number
of message frames that have matched
this slaves address on this port. This
count includes message frames which
the slave may or may not be able to
parse and respond.
3 200 5 DNP Slave Port total
number of response
message frames sent
from slave
This value represents the number of
good (non-error) responses that the
slave has sent to the master on this
port. The presumption is that if the
slave is responding, the message was
good. Note: This is a frame count.
4 200 6 DNP Slave Port total
number of message
frames seen by slave
This value represents the total number
of message frames received by the
slave, regardless of the slave address.
5 200 7 DNP Slave
synchronization error
count (Physical Layer
Error)
This value counts the number of times
a sync error occurs. The error occurs
when extra bytes are received before
the start bytes (0x05 and 0x64) are
received.
6 201 2 DNP Slave overrun error
count (Physical Layer
Error)
This value counts the number of times
the overrun error occurs. This error
occurs when the mainline Data Link
Layer routine cannot read the data
received on the communication port
before it is overwritten.