Eaton MTL83*C Modbus Software Manual page 32

28
DRAFT - 06 January 2019
There are some errors shown in the example above. This is because the MTL831C
#1 was disconnected from the Data Highway and then re-connected. It is typical
in this case to see a few errors. The Bad and Fragment packets received at the
MTL838C are due to Data Highway transitions due to unplugging and plugging
in the MTL831C #1. Similar things can occur if the MTL831C is reset via the PC
Software as described in the Devices section. Retransmits occur when an MTL831C
is disconnected from the Data Highway. A few of the Low msmt (measurement)
quaility occur on the MTL831C whenever it is powered up. The following table
provide details on the diagnostic items:
MTL838C Diagnostics
Total highway packets sent
Good packets received
Bad packets received
Fragmented packets received
MTL831C #1 Retransmits
MTL831C #2 Retransmits
MTL831C #x Diagnostics (x = 1 or 2)
Good packets received
Bad packets received
Fragmented packets received
High or low voltage events
PSoC3A:
Low/high voltage events
PSoC3A:
Low msmt quality events
PSoC3B:
Low/high voltage events
PSoC3B:
Low msmt quality events
A running total of the number of packets of data sent to
either MTL831C.
Number of good (no CRC error) packets received from the
MTL831Cs.
The number of packets that had a CRC error. Caused by
connecting or disconnecting MTL831Cs or by noise.
A count of the number of incomplete packets received.
This is usually noise or connect/disconnect of an
MTL831C.
Number of times the MTL831C did not respond to a
command (the MTL838C is the bus master) and the
command had to be retransmitted. After 3 consecutive
missed responses the MTL831C is 'dropped' and must go
through re-initialization if it starts communicating again.
Same as above but for the MTL831C with the Address
Jumper (#2).
Number of good (no CRC error) packets received from the
MTL838C or other MTL831C if connected..
The number of packets that had a CRC error. Caused by
connecting or disconnecting MTL831Cs or by noise.
A count of the number of incomplete packets received.
This is usually noise or connect/disconnect of an
MTL831C.
High or low voltage events detected by the main
microprocessor. Multiple events can be recorded for a
single voltage event.
High or low voltage events detected by the A
measurement microprocessor. Multiple events can be
recorded for a single voltage event.
The main microprocessor detected a low number of
measurements per second from the A microprocessor.
High or low voltage events detected by the B
measurement microprocessor. Multiple events can be
recorded for a single voltage event.
The main microprocessor detected a low number of
measurements per second from the B microprocessor.
INM MTL83xC PC Modbus Rev 1