ABP MODBUS differential pressure transmitter

Description

The values measured via the integrated Honeywell sensor of the ABP series, then recalculated and averaged in the microcontroller, are available in its memory (in registers of the HOLDING REGISTERS type) according to the MODBUS standard. The registers are read out using MODBUS protocol functions transmitted via the serial RS-485 interface. The registers also contain information about the currently set (configurable) measuring range, the time constant (also configurable) and the percentage of pressure value related to the range. Signalling of missing sensor, overrange conditions, transmitter occupancy in the event of an offset calibration being performed is also provided via status registers.