Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 100)

4-6
IM 04L31A01-17E
• Commu. Data (First, Last)
Specify which communication input data will be assigned the data that is read from
the slave device (C01 to C30).
Communication input
data of the CX
(Modbus master)
Device A register Device B register
Modbus slave device
C01
C02
C30
30001
30002 30001
30002 (When two registers
are used to express
the 32-bit data)
•
• Address
Specify the address of the slave device from the following:
1 to 247
• Registers
Specify the register number of the slave device. Since 32-bit data is assigned to
two registers, specify the smaller register number (see the “Type” item below).
Input registers: 30001 to 39999, 300001 to 365535
Hold registers: 40001 to 49999, 400001 to 465535
• Type
Specify the type of data that is assigned to the Modbus register of the slave device
(the CX reads all data as floating point data).
• INT16
Specify this type when a “16-bit signed integer” is assigned to the Modbus
register.
Communication input
data of the CX
Modbus register
Signed 16-bit integer Cxx
• UINT16
Specify this type when a “16-bit unsigned integer” is assigned to the Modbus
register.
• INT32_B
Specify this type when a “32-bit signed integer” is assigned to the Modbus
register in the order upper 16 bits followed by the lower 16 bits.
Specify the smaller register number (the higher register number in this case) in
[Registers].
Communication input
data of the CX
Modbus register
Cxx (High)
(Low)
Signed 32-bit integer
• INT32_L
Specify this type when a “32-bit signed integer” is assigned to the Modbus
register in the order lower 16 bits followed by the upper 16 bits.
Specify the smaller register number (the lower register number in this case) in
[Registers].
Communication input
data of the CX
Modbus register
Cxx (Low)
(High)
Signed 32-bit integer
4.3 Setting the Modbus Master Function