Siemens SITRANS LR 300, Инструкция по эксплуатации, Страница: 74 / 140

Page 72 SITRANS LR 300 – INSTRUCTION MANUAL 7ML19985CL02
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Communications Parameters (P750 and P752)
P750 Ident Number Section (F = 0)
Directs the device to use either the manufacturer-specific (Siemens Milltronics)
identification number, or the profile-specific ident number (Class 1 master using Profile
3.00 level gsd file).
P752 Profibus PA / HART address
Allocates the fieldbus ID or address for the device.
Serial Communication Parameters (P770 to P799)
These parameters control the RS-485 port. If you are using the Modbus protocol, use
P799 to set the SITRANS LR 300 to read-only or read-write. The Modbus Register Map is
on page 83.
P770 Serial Protocol (F = 1)
Sets the communications protocol used on the RS-485 port.
Values
0 Manufacturer Specific identification number
1 Profile Specific Ident Number
Values for Profibus PA
Range: 1 to 126
Default: 126
Values for HART
Range: 0 to 16
Default: 0
Values
0 Communications disabled
1 Dolphin Protocol
2 Modbus ASCII slave serial protocol
3 Modbus RTU slave serial protocol
SITRANS LR 300.book Page 72 Monday, June 10, 2002 7:18 PM