Siemens sitrans LU01 - Manual (Page 71)

7ML19985BE02 SITRANS LU01 – INSTRUCTION MANUAL Page 65
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Peripheral Communication Support Parameters
(P740 to P749)
P740 Peripheral Communications
Use this feature to select the SITRANS LU01 to communication message format.
P748
RS-485 Termination
Single point termination may be required to minimize transmission reflections, on long
cable runs typical of 500 m or more.
P749 Serial Bus Type
Displays the type of communication bus the SITRANS LU01 is currently set for. If there is
no connection, the SITRANS LU01 defaults to RS-485. If a bus type other than RS-485 is
connected, the SITRANS LU01 displays the type of bus it is, or is attempting to,
communicate with.
SmartLinx Reserved (750 to 769)
These parameters are reserved for optional SmartLinx communications cards and vary by
card. Refer to the SmartLinx documentation to determine if any of them are used.
Values
0 Off
if comm port is not used, OFF increases LU01 pro-
cessing speed.
1 *
normal
messages
(preset)
messages transmitted as a continuous string of
characters
2
formatted
messages commas inserted between message fields for
easier message distinction
Note: Refer to Technical Reference / Communication Support on page 94 if
Peripheral Communication is required.
Values
0 * Off
1 on
Values (view only)
232 RS-232
485 * RS-485: default when nothing is connected
bPL bipolar current loop
rJ11 for Siemens Milltronics use