IntesisBox IBOX-BAC-MBTCP-100 User Manual page 20

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IntesisBox BACnet/IP Server - Modbus TCP Master
Consult documentation of Modbus device(s) to integrate for information about Modbus data
format of the points desired to integrate.
Description It's the Modbus TCP register address to use by IntesisBox to read/write the
point into the Modbus TCP device.
Edit mode Text edit or AutoEnumeration
Comments Consult documentation of Modbus device(s) to integrate for information about register
addresses of the points desired to integrate.
Description Bit used inside the Modbus TCP register to encode the digital value for the
point. IntesisBox allows bit decoding from generic 16 bits input/holding
Modbus TCP registers. Bit coding into 16 bit input/holding Modbus TCP
registers is used for some devices to encode digital values into this type of
registers.
Values 0 to 15
Restrictions Only used with Format=11 (16 bits digital) and Code= 3 or 4 (read
holding/input registers).
To decode more than one of the bits of the 16 bits register all the decoding
rows should be grouped together in the table
Edit mode Text edit
Description Fractional part to consider for the point's value when read/write. Some
devices encode for example temperature values (integer + fractional part) in
common 2-bytes Modbus TCP registers (using data format 16 bits signed
two's complement for example); the problem of using 2-bytes registers is
that no fractional part can be encoded.
To avoid this problem, the real value in the device is sent multiplied by 10 as
just integer part (a real value of 25.1 will be sent as 251). For this kind of
points for example you can specify a value of 1 in Frac column. Then the
value decoded by IntesisBox from the slave will be divided by 10, and the
value will be multiplied by 10 before writing to the slave, thus will be the
real value in the device (including integer and fractional part).
Edit mode Text edit or AutoEnumeration
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This information is subject to change without notice
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IntesisBox is a registered trademark of Intesis Software SL
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