Communication Protocol - Microsensor MPM Series Operation Manual

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
Fun. CRC
Start Add. Date End
code check
T1–T2–T3–T4 8 BITS 8 BITS n x 8 BITS 16 BITS T1–T2–T3–T4
Table 8.2 Common register list
15