Modbus Appendix; Modbus Switches; Data Types - ComAp InteliSys NTC Basebox Communications Manual

10 Modbus Appendix

10.1 Modbus Switches

10.2 Data types

10.3 Communication status
10.4 Error list
6 back to Table of contents
10.1 Modbus Switches
The "Modbus Switches" are two Modbus registers dedicated for continuous writing of binary information via
Modbus. Both registers are available on Modbus for simple writing (using command 6 or 16). The particular bits
of these registers are available as binary status for universal use in logical binary outputs of the controller as
"MODBUSSW1..MODBUSSW32". No password is required for writing of those registers (if there is no general
password for Modbus writing). There are two Values "ModbusSw1" and "ModbusSw2" in group "Log Bout"
available for back-reading.
Register for writing
ModbusSw1
ModbusSw2
Note: Modbus register number for back-reading may be different based on controller family. Check register
numbers in list of registers described in "How get numbers of ModBus communication objects". Register
number for writing is not mentioned in list of registers.
Note: The LSB of ModbusSw1 (46337) corresponds with LBO "ModbusSw1"
The LSB of ModbusSw2 (46338) corresponds with LBO "ModbusSw17"
Register for writing
ModbusSw1 (46337)
Register for writing
ModbusSw2 (46338)
10.2 Data types
The following table contains the communication objects data types and their representation in the data part of
the communication function.
IGS-NT Communication Guide
Modbus register number
46337
46338
Modbus register number
000F HEX
Modbus register number
F000 HEX
Value for back-reading
ModbusSw1
ModbusSw2
LBO ModbusSw16 ......................ModbusSw1
0000 0000 0000 1111
LBO ModbusSw32 ......................ModbusSw17
1111 0000 0000 0000
Modbus register number
40547
40548
146
146
148
150
146