Y
Dear Sir,
here i am sending response after min 15msec after receipt of valid query.
I would like to have your comment regarding my
following observation:
I have implemented MODBUS RTU protocol.
baud rate 9600
parity none
stop bit 1
word length 8 bits
CPU used in energy meters is 8051.
Data type is IEEE floating point format.
Suppose i send a request to slave for say
5 floating point parameters then the query sent by master should be as follows:
0x01 ,0x03,0x00,0x00,0x0A,XX,XX (XX = CRC)
stn No Func code Start Add Length of data CRC
The above query is as per Modicon Modbus
document.
My meter is responding well for above query.
But if i request same number of parameters
through RSVIEW then the query sent by Master
is different i.e only 5 registers.
data length (no of registers requested )
i would like to have your comment on length
of holding registers and size of holding reg
(i.e. whether the holding register will be 16
bit or 8 bit)
regards
yogesh
Reply
here i am sending response after min 15msec after receipt of valid query.
I would like to have your comment regarding my
following observation:
I have implemented MODBUS RTU protocol.
baud rate 9600
parity none
stop bit 1
word length 8 bits
CPU used in energy meters is 8051.
Data type is IEEE floating point format.
Suppose i send a request to slave for say
5 floating point parameters then the query sent by master should be as follows:
0x01 ,0x03,0x00,0x00,0x0A,XX,XX (XX = CRC)
stn No Func code Start Add Length of data CRC
The above query is as per Modicon Modbus
document.
My meter is responding well for above query.
But if i request same number of parameters
through RSVIEW then the query sent by Master
is different i.e only 5 registers.
data length (no of registers requested )
i would like to have your comment on length
of holding registers and size of holding reg
(i.e. whether the holding register will be 16
bit or 8 bit)
regards
yogesh
Reply