Model 2200 Scaler Ratemeter
Ludlum Measurements, Inc. Page 16 March 2016
RS-232 Commands
The Model 2200 communicates by way of the RS-232 interface. The RS-232
port operates at 2400 baud, 8 data bits, 1 stop bit, no parity, and hardware
(RTS/CTS) flow control.
A standard RS-232 cable with straight-through connections is required.
Pin-outs of RS-232 Connector/Cable information:
Model 2200 PC (9-Pin)
2 TXD RXD 2
3 RXD TXD 3
5 GND GND 5
7 CTS RTS 7
8 RTS CTS 8
All RS-232 Commands must be in UPPERCASE and terminated with either a
carriage return (13) + linefeed (10) or just a linefeed (10) character. The
instrument uses the linefeed character to determine when a valid command has
been received.
SS: Start/Stop a scaler count.
SO: Start/Stop a scaler count. When the count completes, the scaler reading is
automatically sent to the computer.
RS: Read the scaler count.
RL: Read the count time left.
RM: Ready count time base; returns “0” for minutes and “1” for seconds.
SC: Set count time. Count time is adjustable from 1 to 65535. The count time
push-wheels must be set to 000 for this count time to be active.
RC: Read the current count time. If the count time push-wheels are set to 000,
the PC count time is returned.
To Next Page
Loading...
