ABB REM 610 Technical Reference Manual page 76

REM 610 REM 610
76
Motor Protection Relay
Technical Reference Manual - ANSI Version
Table 5.1.14.1.-2 Supported diagnostic subfunctions
Code Name
00 Return query data
01 Restart
communication
option
04 Force listen only
mode
10 Clear counters and
diagnostic register
11 Return bus
message count
12 Return bus
communication error
count
13 Return bus
exception error
count
14 Return slave
message count
15 Return slave no
response count
16 Return slave NACK
response count
18 Return bus
character overrun
count
Sending other subfunction codes than those listed above cause an
Illegal data value response.
The Modbus protocol provides the following diagnostic counters:
Description
The data in the query data field is returned (looped back)
in the response. The entire response is to be identical to
the query.
The slave's peripheral port is initialized and restarted
and the communication event counters are cleared.
Before this, a normal response will be sent provided that
the port is not in the listen only mode. However, if the
port is in the listen only mode, no response will be sent.
The slave is forced to enter the listen only mode for
Modbus communication.
All counters and the diagnostic register are cleared.
The number of messages in the communications system
detected by the slave since its last restart, clear counters
operation or power up is returned in the response.
The number of CRC errors encountered by the slave
since its last restart, clear counters operation or power
up is returned in the response.
The number of Modbus exception responses sent by the
slave since its last restart, clear counters operation or
power up is returned in the response.
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 is returned
in the response.
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 is returned
in the response.
The number of messages addressed to the slave for
which a NACK response has been sent is returned in the
response.
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 is returned in the response.
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