Microsensor MPM Series - Communication Protocol

15
manifolds between controller and measuring point; pressure port G1/4
male’s length should be no more than 12mm, and sealed by seal
cushion.
Note：
(1) process operation pressure should be no more than 20MPa.
(2) the measured media differential pressure should not exceed upper limit
pressure.
(3) Open 3 valve manifold to prevent that one single pressure acts on transmitting
controller to protect product.
(4) Media should be compatible with construction material.
(5) Pressure port marked with “+” and ”-”. This will keep correct connection.
7.3 MPM460W
Standard MPM460W level transmitting controller is submersible type and
the installation direction is vertical down.
8. Communication protocol
The products uses standard Modbus RTU protocol (03: read register，
06: set single register).
Table 8.1 Data format
Start
Add.
Fun.
code
Date
CRC
check
End
T1–T2–T3–T4
8 BITS
8 BITS
n x 8 BITS
16 BITS
T1–T2–T3–T4
Table 8.2 Common register list