Operating instructions

PTQ-MCM ♦ Quantum / Unity Platform Modifying the Configuration File
Modbus Communication Module
Page 66 of 139 ProSoft Technology, Inc.
April 29, 2008
Type
Type : 0 #Type of port (0=Master, 1=Slave,
#2=Block Pass-Thru, 3=Block PT w/ Byte Swap,
#4=Direct PT, 5=Direct PT w/ Byte Swap)
This parameter specifies which device type the port will emulate. For specific
information on types 2-5, refer to the Pass-Thru Functionality section of this
manual.
Pass Thru Address
Pass Thru Address : 1000 #Pass-Thru address to be used during Block
#Pass-Thru mode.
This parameter specifies the starting processor holding register address where
the pass-thru block will be copied to. This parameter is only used if the type
parameter is configured for Block-Pass-Thru operation (codes 2 and 3). The
module adds 400001 to the actual value configured by the module. For example,
a value of 200 would imply in a processor address of 400201
Float Flag
Float Flag : No #Float Flag (No=No Floating Point Data, Yes=Use
This flag specifies if the floating-point data access functionality is to be
implemented. If the float flag is set to 1, Modbus functions 3, 6, and 16 will
interpret floating-point values for registers as specified by the two following
parameters.
Float Start
Float Start : 7000 #The first register of floating-point data.
This parameter defines the first register of floating-point data. All requests with
register values greater than or equal to this value will be considered floating-point
data requests. This parameter is only used of the Float Flag is enabled.
Float Offset
Float Offset : 2000 #Internal DB offset to start of floating point
#data
This parameter defines the start register for floating-point data in the internal
database. This parameter is only used if the Float Flag is enabled.
Protocol
ASCII or RTU
This parameter specifies the Modbus protocol to be used on the port. Valid
protocols are: rtu = Modbus RTU and ascii = Modbus ASCII.