82
Note:
Each transducer connected to the communication network must
have:
•
unique address, different from addresses of other devices connec
-
ted to the network,
•
identical baud rate and type of information unit.
5.9.3. Description of the implemented functions
The following MODBUS protocol functions have been implemented
in PCE-P30U transducers:
•
03 (03h) – Read Holding Registers
•
04 (04h) – Read Input Registers
•
06 (06h) – Write Single Register
•
16 (10h) – Write Multiple registers
•
17 (11h) – Report Slave ID
•
43 (2Bh) - Encapsulated Interface Transport
Read Holding Registers (code 03h)
Example 5.
Reading two float(32 bits) registers, first register address is
1DB0h (7600), register values (7600, 7601): 10.0, 100.0.
Request:
Device
address
Fun
-
ction
Register
address
Number
of registers
CRC
B1
B0
B1
B0
01h
03h
1Dh
B0h
00h
02h
C380h
Table 24
