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TPU2000/2000R Modbus/Modbus Plus/ Modbus TCP/IP Automation Guide
SERIAL Modbus Protocol Selection and Configuration for Port 3 and AUX COM
Modbus requires parameterization above that of the unit number, baud rate, and frame selection. The philosophy
is that (if the hardware is provided on the card) one or both ports may be configured with Standard Ten Byte or
Modbus (ASCII or RTU). The parameterization requires entry of constants in the Parameter Section of the
Communication configuration menu tab (Via WinECP) or Configuration Menu (via the Front Panel Interface). If as
per the above tables, the Modbus card is to be configured via software (ECP or WinECP), the following must be
configured via the front panel interface or via WinECP.
The following table represents Option 2 Communications Settings:
Parameter 1
ModeParameter 1
0
Disabled
1
Disabled
1
Enabled
2
Disabled
2
Disabled
3
Disabled
3
Enabled
3
Disabled
3
Enabled
NOTE: STD is Standard Ten Byte Protocol Selected.
If a Modbus capable card is inserted into the unit, the configuration screen appears as shown in Figure 4-7. The
Baud and Frame Options allowable for RTU and ASCII communication are shown in Table 4-4.
Table 4-4. Valid Parameter Selections for Standard Ten Byte and Modbus Protocols
PROTOCOL
SELECTED
Modbus ASCII
Modbus RTU
Standard Ten Byte
Modbus TCP/IP
Mode Parameter 2
Disabled
Disabled
Disabled
Disabled
Enabled
Disabled
Disabled
Enabled
Enabled
BAUD RATE SELECTIONS
300,1200, 2400, 4800, 9600, 19200
300,1200, 2400, 4800, 9600, 19200
300,1200, 2400, 4800, 9600, 19200
NONE
(COM3)
STD
Modbus RTU
Modbus ASCII
STD
STD
Modbus RTU
Modbus ASCII
Modbus RTU
Modbus ASCII
FRAME SELECTIONS
•
Odd Parity, 7 Data Bits, One Stop Bit
•
Odd Parity , 7 Data Bits, Two Stop Bits
•
Even Parity, 7 Data Bits, One Stop Bit
•
Even Parity, 7 Data Bits, Two Stop Bits
•
Even Parity, 8 Data Bits, One Stop Bit
•
No Parity, 8 Data Bits, One Stop Bit
•
Odd Parity, 8 Data Bits, One Stop Bit
•
No Parity, 8 Data Bits, Two Stop Bits
•
Odd Parity, 7 Data Bits, One Stop Bit
•
Odd Parity , 7 Data Bits, Two Stop Bits
•
Even Parity, 7 Data Bits, One Stop Bit
•
Even Parity, 7 Data Bits, Two Stop Bits
•
Even Parity, 8 Data Bits, One Stop Bit
•
No Parity, 8 Data Bits, One Stop Bit
•
Odd Parity, 8 Data Bits, One Stop Bit
•
No Parity, 8 Data Bits, Two Stop Bits
•
NONE
RS485 (AUX)
STD
STD
STD
Modbus RTU
Modbus ASCII
Modbus RTU
Modbus RTU
Modbus ASCII
Modbus ASCII
26
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