Siemens SITRANS LR 300, Instruction Manual, Page: 76 / 140

Page 74 SITRANS LR 300 – INSTRUCTION MANUAL 7ML19985CL02
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P799 Communications Control (F = 1)
This parameter determines the read/write access to parameters via remote
communication. Index 1 controls serial communications via the RS-485 port, (Modbus
only). Index 2 controls Profibus PA or HART.
To change an index value:
1. Press TOGGLE to open thesecondary index field: (you may need to press
TOGGLE twice, depending on your start point). The index fields are empty and
read – –.
2. Press the ARROW keys to scroll to the required index (or type in the
address).
3. Key in the index value required, and press ENTER to set the value.
Echo Processing Parameters (P800 to P807)
P800 Near Blanking (F = 0.4m)
Sets the amount of blanking as measured from the flange face and extending into the
measurement range. See Blanking on page 46.
Enter the value in units as set in P005.
Index Values Description
01
0 Read only
1 Read/write
2 Restricted access – read only except for P799 which is read/write
02
0 Read only
1 Read/write
2 Restricted access – read only except for P799 which is read/write
Notes:
• P799 is independent of P000. Even if P000 is locked, a communications master can
write to any parameter if P799=1, or can write to P799 if P799=2.
• P000 controls the lock access if you are using the Siemens Milltronics keypad hand
programmer and Dolphin, but it has no effect on Modbus.
• Press PROGRAM to toggle between RUN and PROGRAM mode.
• Press TOGGLE twice to open parameter fields.
Values
Range:
0 to 99999
Pre-set: 0.4m
Related parameter
P837 Auto False Echo Suppression
SITRANS LR 300.book Page 74 Monday, June 10, 2002 7:18 PM