Exception Responses - Hitachi Abb Rvt Installation Und Betriebsanleitung

The response data field returns the quantity of Modbus exception responses returned by the slave since its last re-
start, clear counters operation, or power-up.
14 Return Slave Message Count
The response data field returns the quantity of messages addressed to the slave, or broadcast that the slave has pro-
cessed since its last restart, clear counters operation, or power-up.
15 Return Slave No Response Count
The response data field returns the quantity of messages addressed to the slave for which it sent no response (nei-
ther a normal response nor an exception response) since its last restart, clear counters operation, or power-up.
16 Return Slave NACK Response Count (Not supported)
17 Return Slave Busy Response Count (Not supported)
18 Return Bus Character Overrun Count
The response data field returns the quantity of messages addressed to the slave that it could not handle due to a
character overrun condition since its last restart, clear counters operation, or power-up
19 (Not supported)
20 (Not supported)
21 (Not supported)
Diagnostic counters
Bus Message Counter
Bus Communication Error Counter
Bus Exception Error Counter
Slave Message Counter
Slave No Response Counter
Bus Character Overrun Counter
3.8.

Exception responses

Exception responses are sent when the slave device cannot handle the query. The format of an exception response to
a master's query is as follows:
STATUS
Approved
The total number of messages that the slave device has de-
tected in the communications system since its last restart,
clear counters operation, or power-up.
The number of CRC or LRC errors encountered by the slave
device since its last restart, clear counters operation, or
power-up.
The number of Modbus exception responses sent by the
slave device since its last restart, clear counters operation,
or power-up.
The number of messages addressed to the slave device or broad-
cast that the slave device has processed since its last restart, clear
counters operation, or power-up.
The number of messages addressed to the slave device for which
it sent no response (neither a normal response nor an exception
response) since its last restart, clear counters operation, or power-
up.
The number of messages addressed to the slave device that it
could not handle due to a character overrun condition since its last
restart, clear counters operation, or power-up .
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DOCUMENT ID
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