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7.- OPERATING DESCRIPTION
7.1.- POWER-UP
Having determined that the unit has been configured for the correct input signal, connect the mains plug to a
suitable AC power source and the signal input to the signal source.
Ensure that the source is an idle condition, i.e. not transmitting data, and switch on the mains power.
The unit will power-up displaying its recognition address, its baud rate, the condition at the signal input, its
operating mode, the parity and bits number.
The display will be as follows :
7
6
Polarity
indicator
Overload
indicator
Number of BITS
Character 1, Baud RATE displayed will be a number from 0 to 7. Factory default is 3 (1200 baud).
Character 2, Recognition ADDRESS : The ADDRESS displayed will be 0 by default (30h) or one of 31 other
numeric and alphanumeric characters from 1 through to letter O. See Table of Characters.
Character 3, Input Signal LEVEL, will show a symbol "L" for a correct idle condition or a symbol "H" for an
incorrect idle condition. For RS485 signals, ensures the transmitter is in active driving condition, since a 485
driver in a receive condition may give a correct idle indication even if the signal wires are transposed.
Character 4, Operating MODE displayed will be "F" for shift mode, or "r" for strobe mode, which is the
factory default.
Character 5, PARITY will show the symbol "I", by default, which means "Ignored" or one of the following
characters ; "n" for none, "o" for Odd and "E" for Even.
Character 6, Number of BITS displayed will be 7 for seven bits or 8 for eight bits.
Character 7, will show the Polarity indication.
After 3 seconds of power-up the display will shown "- - - - - - -", (all middle bar and polarity indicator is light-up)
it means that the instrument is ready to receive data, and all printable characters received (20, 2B, 2D, 2E
and 30 to 5F) will be displayed directly if the instrument is programmed in shift mode or after receiving the
code 0D in strobe mode.
It is convenient in this moment and before starting the addressing mode, to send a character XOFF or ETX to
clear the internal buffer from uindesirable data. (XOFF recommended).
7.2.- OPERATING MODES
The following serial ASCII protocols are DIP switch selectable :
Mode 0 : Each printable character as it is received is placed in the least significant position and all characters are
shifted left one position. Following a carriage return character, the next valid character received causes
the display to clear and that character is placed in the least significant position. (If it is a printable
character)
Mode 1 : Printable characters are placed in a buffer on reception. Receipt of the carriage return character causes
the buffer contents to be transferred to the display.
Page : 9
5
4
3
Input Signal LEVEL
Operating MODE
PARITY
2
1
NOTE : 4 digit version does
Baud RATE
Recognition ADDRESS
not have 2 left hand
characters.
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