IntesisBox IBOX-BAC-MBRTU-100, User Manual

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IntesisBox
®
BACnet/IP Server - Modbus RTU Master
User’s Manual r14 eng
© Intesis Software S.L. - All rights reserved
This information is subject to change without notice
IntesisBox
®
is a registered trademark of Intesis Software SL
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Comments Consult documentation of Modbus device(s) to integrate for information about register
addresses of the points desired to integrate.
Bit
Description Bit used inside the Modbus register to encode the digital value for the point.
IntesisBox allows bit decoding from generic 16 bits input/holding Modbus
registers. Bit coding into 16 bit input/holding Modbus 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
Frac
Description Fractional part to consider for the point's value when read/write. Some
devices encode for example temperature values (i fractional part) in
common 2-bytes Modbus 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
Bac.Name
Description BACnet object name for the signal. This name is included into the BACnet's
Object_name property for the point and it will be collected by any BACnet
explorer.
Restrictions Maximum 30 characters
Edit mode Text edit
Comments Recommended to give a descriptive name to each point with indication of
the Modbus slave/register associated
Bac.Type