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(Original Document)
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(Original Document)
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Modbus request
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Function code / sub-function code
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PLC object
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|---|---|---|
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Read n output bits
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16#01
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%M
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Read n input bits
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16#02
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%M
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Read n output words
|
16#03
|
%MW
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Read n input words
|
16#04
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%MW
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Write an output bit
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16#05
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%M
|
|
Write an output word
|
16#06
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%MW
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Write n output bits
|
16#0F
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%M
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Write n output words
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16#10
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%MW
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Designation
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Function code / sub-function code
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|---|---|
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Read exception status
|
16#07
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Echo
|
16#08 / 16#00
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Initialize module
|
16#08 / 16#01
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Read the diagnostic registers of the PLC
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16#08 / 16#02
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Change end of frame delimiter (ASCII mode)
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16#08 / 16#03
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Switch to listening mode
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16#08 / 16#04
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Reset counters
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16#08 / 16#0A
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Number of messages received without CRC error
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16#08 / 16#0B
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Number of frames received with CRC error
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16#08 / 16#0C
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Number of exceptional responses
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16#08 / 16#0D
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Number of messages addressed to the PLC
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16#08 / 16#0E
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Number of broadcast messages received
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16#08 / 16#0F
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Number of correct responses
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16#08 / 16#10
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Number of messages received in listening mode
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16#08 / 16#11
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Number of invalid characters received
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16#08 / 16#12
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Read event counter
|
16#0B
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Read connection event
|
16#0C
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Read identification
Note: The slave request response returns the same elements as the UNI-TE identification request (see the subchapter General Use Requests in the TSX DR NET manual).
|
16#11
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