ANALOG WAY
PAGE 20
SMS100 - ED 07/01
9) REMOTE CONTROL RS-232 (continued)
9-2) HOST / SMART SCALER™ COMMUNICATION
If you need to use your own Control Software program with a PC or WORKSTATION by a RS-232 port,
the SMART SCALER™ allows to communicate by simple transmit and receive ASCII codes.
The SMART SCALER™ treats any character that it receives on the RS-232 as a possible command but accepts only
legal commands.
There are no codes to say that a command is coming, or that a command has ended.
A command can be a single character typed on a keyboard and does not require any special character before or after
it. (it is not necessary to press "ENTER" on the keyboard).
Simple commands can be from a PC or any other controlling device.
When the SMART SCALER™ receives a valid command, it will execute the command and send a response back to
the host device.
If the command is invalid, an error response will be returned to the host.
All responses to the host end with a carriage return and a line feed (CR / LF) signaling the end of the response
character string.
•
PROTOCOL
: Simple character
•
CONTROLS STRUCTURE
Controls are usually composed of a numerical value followed by the letter of the command.
The letter used without a numerical value returns the current setting of the command.
Please see "COMMANDS AND RESPONSES TABLE".
- COMMANDS : Y, I, r, w, x, y, z, O, o, u, H, V, W, S, B, C, s, T, b, j, A, Q, N.
( PARAMETER )
< COMMAND >
a character (Usually a letter)
Without parameter :
Reads back the current value
ex : H
⇒
HPOS10
↵
With a numerical parameter :
Sets a new value
ex : 20H
⇒
HPOS20
↵
- COMMANDS (Read only : STATUS) : U, l, t, P, p, v, n, ?, K, L, R and X.
( PARAMETER )
< COMMAND >
a character (Usually a letter)
Without parameter :
Reads back the current value
ex : I
⇒
ICHAN1
↵
