Process Unit 73 LF - Knick

Remote Interface Operation
You can only make use of the interface if your Process
Unit is equipped with option 351.
Without this option, the menu reads ”Interface
(Optional)”. This menu item cannot be selected.
When the RS 485 interface is used, terminal 15
(RS 485 shield) must be grounded to meet the radio
interference limits (according to German decree
243/91). Do not use the protective conductor
for grounding!
To operate the Process Unit 73 LF at a PC, a commercial
RS 232 C/RS 485 interface converter can
be used.
What you can do with the interface
The serial RS 485 interface allows you to:
read out all measured values
query instrument status including limit and
alarm messages, instrument diagnostics and
logbook
perform complete parameter setting
start a rinsing cycle via remote control
For description of the complete command set and
the transmission protocol, refer to chapter 12.
If the instrument is in remote status during interface
operation, the reading ”Remote” appears in
the upper right corner of the display in measuring
mode.
The keypad is locked for all entries!
When the instrument is in measuring mode, you
can press to return to ”local” status. (You
are prompted for confirmation.) The keypad will be
enabled.
The interface can be defined for:
point-to-point operation
(Process Unit 73 LF connected with a controller,
e.g. PC) or
bus operation with up to 31 instruments and a
controller (e.g. PC) at a bus.
Capabilities 9–49