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7ML19985CL02
SITRANS LR 300 – INSTRUCTION MANUAL
Page 73
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P771 Bus Address (for Modbus) (F = 1)
Allocates the unique identifier of the SITRANS LR 300 on the network for the RS-485 port.
For devices connected with a serial Modbus slave protocol, this parameter is a number
from 1-247. The network administrator must ensure that all devices on the network have
unique addresses. Do not use the value 0 (zero) for Modbus communications because
this is the broadcast address and is inappropriate for a slave device.
P772 Baud Rate (F = 9.6)
Sets the communication rate with the master device.
This specifies the rate of communication in Kbaud. Any value may be entered, but only
the values shown are supported. The baud rate should reflect the speed of the connected
hardware and protocol used. For updating software, you must use 9600 baud.
P773 Parity
(F = 0)
Sets the serial port parity for the RS-485 port.
P774 Data Bits and Stop Bits
There are eight data bits and one stop bit.
Values
Range:
0 to 99999
Pre-set: 1
Values
4.8
4800 baud
9.6
9600 baud
19.2
19,200 baud
38.4
38,400 baud
Values
0
No Parity (default)
1
Odd Parity
2
Even Parity
Notes:
• Ensure that the communications parameters are identical between the
SITRANS LR 300 and all connected devices.
• If 7 data bits are chosen for Modbus ASCII, then parity must be set to either 1 (odd)
or 2 (even), and not to 0 (no parity).
•
SITRANS LR 300.book Page 73 Monday, June 10, 2002 7:18 PM
Summary of Contents for SITRANS LR 300
Page 1: ...SITRANS LR 300 Instruction Manual ITRANS LR 30 July 2002 ...
Page 14: ...Page 12 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Specifications ...
Page 46: ...Page 44 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Start Up ...
Page 96: ...Page 94 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Troubleshooting ...
Page 136: ...Page 134 SITRANS LR 300 INSTRUCTION MANUAL 7ML19985CL02 mmmmm Appendix VIII ...
Page 139: ......