ABB REM 610 Technical Reference Manual page 77

1MRS755537
Motor Protection Relay
Technical Reference Manual - ANSI Version
Table 5.1.14.1.-3 Diagnostic counters
Name
Bus message count
Bus communication error count
Bus exception error count
Slave message count
Slave no response count
Slave NACK response count
Bus character overrun count
The following exception codes may be generated by the Modbus protocol:
Table 5.1.14.1.-4 Possible exception codes
Code Name
01 Illegal function
02 Illegal data address
03 Illegal data value
04 Slave device failure
If an Illegal data value exception response is generated when
attempting to preset multiple registers, the contents of the register to
which an illegal value has been imposed and of the following registers
is not changed. Registers which have already been preset are not
restored.
Description
The number of messages in the communications
system detected by the slave since its last pickup,
clear counters operation or power up.
The number of CRC or LRC errors encountered by the
slave since its last restart, clear counters operation or
power up.
The number of Modbus exception responses sent by
the slave since its last restart, clear counters operation
or power up.
The number of messages addressed to the slave or
broadcast which the slave has processed since its last
restart, clear counters operation or power up.
The number of messages addressed to the slave for
which a response (neither a normal response nor an
exception response) has not been sent since its last
restart, clear counters operation or power up.
The number of messages addressed to the slave for
which a NACK response has been sent.
The number of messages addressed to the slave for
which it has not been able to send a response due to a
character overrun since its last restart, clear counters
operation or power up.
Description
The slave does not support the requested function.
The slave does not support the data address or the
number of items in the query is incorrect.
A value contained in the query data field is out of range.
An unrecoverable error has occurred while the slave
was attempting to perform the requested task.
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