Motorola LS6000B-U Betriebsanweisung Seite 143

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LS 6000 Scintillation System User’s Manual
PN 247971-F
c-1
RS232
Specifications
c
c
RS232
c.1 Specifications
Standard ASCII format, upper case only, is used throughout. The LS is configured at the
factory to transmit at a baud rate of 1200. The Word Format is defined as: 1 start bit; 8 data
bits (with no parity bit); 1 stop bit.
To match
the default settings of the instrument, any device connected to the RS232 port must
be configured as:
1200 Baud
1 Start Bit
7 Or 8 Data Bits
No Parity
1 Stop Bit, Minimum
Half Duplex
The instrument arrives configured as Data Communications Equipment (DCE) which means
it behaves like a modem. An external device connected to the LS should be configured as Data
Terminal Equipment (DTE). A standard RS232 cable is used.
(If the external device is
configured as DCE, then a “Modem Bypass” or “Null Modem Cable” must be used.)
The default parameters for
the RS232 port may be changed under System Setup. Refer to
Alarm Section 2.
c.2 Handshaking
XON-XOFF handshaking has been implemented. The LS will respond to the control
characters:
XON: Control-Q; Hex 11; Decimal 17, ASCII
XOFF: Control-S; Hex 13; Decimal 19, ASCII
Figure c.1 RS232 Pin Designation.
Pin Number Signal Name Direction
2 TXD Input (to LS 6000)
3 RXD Output (to external device)
4 RTS Input
5 CTS Output (Handshake)
6* DSR Output
7GNDOutput
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