7 Remote Operation
7.1 Access Rights
After switching on, the FH 55 is in LOCAL-Mode. In this mode it can be operated from the
keypad. When the serial interface starts to write to the instrument, the access from the keypad is
restricted (remote mode).
Important: to allow the access via the keypad again, the interface must receive the #LOCAL
command or you must execute the Local command in the Remote Access menu.
7.2 Command Format for the Serial Interface
Read parameters:
?COMMAND
C
R
COMMAND stands for one of the command texts listed below.
Set parameters:
#COMMAND VALUE
C
R
VALUE stands for the numerical value.
Each command must be terminated by a carriage return (chr$(13)).
The FH 55 answers with string, that is terminated by a carriage return followed by a line feed.
The following parameters can be read or changed.
COMMAND Description
MODE Write: #MODE 1 switches to AC mode
#MODE 0 switches to DC mode
Answer: MODE 0 or MODE 1
Read: ?MODE
Answer: MODE 0 or 1
RANGE Write: #RANGE n n = 1...7
Answer: RANGE 1...7
Read: ?RANGE
Answer: RANGE 1...7
1 = 30 µT, 2 = 300 µT, 3 = 3 mT, 4 = 30 mT, 5 = 300 mT, 6 = 3 T, 7 = 30 T
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