Instruction manual

Reading Registers

AiRanger IV Reading registers (read only) contain the measurement display value. Two registers are used for

the reading associated with each point.

Port 1 Reading registers range from 40121 to 40240, corresponding to the AiRanger IV points of measure.

Registers 40121 and 40122 apply to point 1, 40123 and 40124 to point 2, etc.

Check the first register for a value of 56,797 ($DDDD) (point out of service) or 61,166 ($EEEE) (display

overflow).

For any other value, convert the register values to a floating point decimal (FPD) value by:

FPD = Register 1 (decimal equivalent) value +

10,000

The range of FPD values possible is 0.0 to 9,999.9999

Confidence Registers

AiRanger IV Confidence registers (read only) contain the echo confidence value of the associated point of

measure. Port 1 Confidence registers range from 40241 to 40300. Register 40241 corresponds to point 1,

40242 to point 2, etc. The Confidence register value range is 00 ($00) to 99 ($63).

Analog Registers

AiRanger IV Analog registers (read only) contain a value representing the AiRanger IV mA output of the

associated point of measure. Port 1 Analog registers range from 40301 to 40360. Register 40301

corresponds to point 1, 40302 to point 2, etc. The Analog register value range is 000 ($000) to 4095 ($FFF).

Divide the decimal equivalent by 204.75 to calculate the mA value.

AIRANGER IV WRITE ONLY REGISTERS

When a Port Initialization configures a BIC-II product port to suit an AiRanger IV, several write only registers

are established. Write the point of measure (1 to 60) number to the appropriate register.

NAME NUMBER DESCRIPTION

MT10 40481 scan the Port 1 specified point next

MT11 40482 acknowledge the Port 1 specified point alarm

MT12 40483 assign the Port 1 specified point to the priority scan loop

MT13 40484 remove the Port 1 specified point from the priority scan loop.

PL-371 9 – 10