- 36 -
Number of registers L
h04
Number of registers L
h04
Byte Count
h08
CRC16 H
hC0
Datum 1 H
h00
CRC16 L
h0F
Datum 1 L
h00
Datum 2 H
h07
Datum 2 L
hD0
Datum 3 H
h00
Datum 3 L
h00
Datum 4 H
h0B
Datum 4 L
hB8
CRC16 H
hB0
CRC16 L
hA2
EXAMPLE 3
Multiple commands reading for registers (hexadecimal command 3, h03):
Assuming that we wish to read the two gross weight values (in the example 4000) and net weight values
(in the example 3000), reading from address 40008 to address 40011 must be performed by sending
the following string:
h01 h03 h00 h07 h00 h04 hF5 hC8
The instrument will respond with the string:
h01 h03 h08 h00 h00 hF hA0 h00 h00 h0B hB8 h12 h73
Query field name
hex
Response field name
hex
Instrument Address
h01
Instrument Address
h01
Function
h03
Function
h03
Address of the first register H
h00
Address of the first register H
h08
Address of the first register L
h07
Address of the first register L
h00
Number of registers H
h00
Datum 1 H
h00
Number of registers L
h04
Datum 1 L
h00
CRC16 H
hF5
Datum 2 H
h0F
CRC16 L
hC8
Datum 2 L
hA0
Datum 3 H
h00
Datum 3 L
h00
Datum 4 H
h0B
Datum 4 L
hB8
CRC16 H
h12
CRC16 L
h73
For additional examples regarding the generation of correct control characters (CRC16) refer to the
manual
Modicon PI-MBUS-300.
