Rosemount 3095FB - Page 45

Model 3095FB Multivariable Transmitter with Modbus Protocol
Modbus Protocol Guide
Page 14 of 79
Table 2-4 Format of Modbus Functions
START ADDRESS FUNCTION DATA CRC CHECK END
3.5 char times 1 CHAR 1 CHAR n CHARs L CHAR, H CHAR 3.5 char times
query $01 start bit H start bit L bit cnt H bit cnt L
resp $01 byte cnt bit7...bit0 bit15...bit8 ...
resp $81 error code
query $02 start bit H start bit L bit cnt H bit cnt L
resp $02 byte cnt bit7...bit0 bit15...bit8 ...
resp $82 error code
query $03 start reg H start reg L reg cnt H reg cnt L
resp $03 byte cnt data H data L ...
resp $83 error code
query $04 start reg H start reg L reg cnt H reg cnt L
resp $04 byte cnt data H data L ...
resp $84 error code
query $05 bit addr H bit addr L FF/00 00
resp $05 bit addr H bit addr L FF/00 00
resp $85 error code
query $06 reg addr H reg addr L data H data L
resp $06 reg addr H reg addr L data H data L
resp $86 error code
query $08 00 00 data H data L
resp $08 00 00 data H data L
resp $88 error code
query $10 start reg H start reg L reg cnt H reg cnt L byte cnt data H data L ...
resp $10 start reg H start reg L reg cnt H reg cnt L
resp $90 error code