LSIS 6731001500, User Manual

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370
RS-485 Communication Features
Total bytes=9
7.3.6.3 Monitor Registration Detailed Protocol
Monitor registration request is made to designate the type of data that requires continuous
monitoring and periodic updating.
Monitor Registration Request
: Registration requests for
n
addresses (where
n
refers to the
number of addresses. The addresses do not have to be contiguous.)
Total bytes= (8 + n x 4): a maximum of 40
Monitor Registration Normal Response
Total bytes=7
Monitor Registration Error Response
Total bytes=9
Monitor Registration Perform Request:
A data read request for a registered address, received
ENQ Station ID CMD Number of Addresses Address SUM EOT
05h ‘01’–‘FA’ ‘X’ ‘1’–‘8’=n ‘XXXX…’ ‘XX’ 04h
1 byte 2 bytes 1 byte 1 byte n x 4 bytes 2 bytes 1 byte
ACK Station ID CMD SUM EOT
06h ‘01’–‘FA’ ‘X’ ‘XX’ 04h
1 byte 2 bytes 1 byte 2 bytes 1 byte
NAK Station ID CMD Error Code SUM EOT
15h ‘01’–‘FA’ ‘X’ ‘**’ ‘XX’ 04h
1 byte 2 bytes 1 byte 2 bytes 2 bytes 1 byte
ENQ Station ID CMD SUM EOT
05h ‘01’–‘FA’ ‘Y’ ‘XX’ 04h
1 byte 2 bytes 1 byte 2 bytes 1 byte