Under/Overflow Monitoring for the TSX ASY 800 Module

Introduction

The TSX ASY 800 module allows an overflow of +/- 5% on voltage ranges and of 4 to 20 mA and + 5% on the current range.

Range under/overflow detection is optional.

Measurement Areas

The measurement range is divided in three areas:

Nominal Area

Measurement range matching the chosen range.

Overflow Area

Area located beyond the upper threshold.

Underflow Area

Area located below the lower threshold.

Overflow Flags

Overflow values for the various ranges are as follows:

You may also choose the flag for an overflow of the range upper value, for an underflow of the range lower value, or for both.

If under/overflow monitoring is required, indications are provided by the following bits:

Bit Name	Meaning (when = 1)
%Ir.m.c.ERR	Denotes an error on the channel
%MWr.m.c.2.1	Denotes a range overflow on the channel : %MWr.m.c.2.3 = 1 denotes an overflow of the range upper threshold, %MWr.m.c.2.3 = 0 denotes an underflow of the range lower threshold.