User's Manual

PL-611 IQ Radar 300 Page 81
Communications
Communications Communications
Communications
Communications: Modbus Register Map
The memory map of the IQ-300 occupies the Modbus holding registers (R40,001 and up).
A description of the types of data is on the following pages. The table legend is at the
bottom of the table. This map is used when protocol is Modbus RTU slave or Modbus
ASCII slave. The table legend is located at the end of the table.
Register Map for Most Common Data
Legend
Type The type of data held in the group of registers.
Start The first register to hold the referenced data.
Data Type
The possible values of the data in the register. See Data Types on page 85 for
more information.
Description The type of data held in the individual registers.
#R The number of registers used for the referenced data.
Read/Write Indicates whether the register is readable, writeable, or both.
Type Description Start #R
8
Data Type
Read/
Write
ID Milltronics Product Code 40,064 1 3 R
Single Parameter Access (SPA) R40,090 7 see appendix III
Reading (1) 41,010 1 -20,000 to 20,000 R
Point
Data
Volume (1) 41,020 1 -20,000 to 20,000 R
I/O
Data
mA Output 41,110 1 0000 to 20,000 R/W
Parameter Access 43,997 to 44,999 R/W
The IQ Radar 300 was designed to make it easy for master devices to get useful
information via Modbus. This chart gives an overview of the different sections. A more
detailed explanation of each section follows below.
Product ID (R40,064)
This value identifies the Milltronics device type. For the IQ Radar 300, the value is 3.
Point Data (R41,010 – R41,031)
Measurement point data contains the current reading on the instrument. This is the
same as shown on the device’s LCD for reading, and volume for the measurement point.
The reading is based on the unit’s operation, and could be level, distance, or volume.
See the IQ 300 Parameter Descriptions on page 55 for details.
8 Maximum registers shown, fewer may be used depending on options installed.