Omega Model CYD211 User’s Manual
4-12 Remote
Operation
Program Operation (Continued)
The following are additional notes on using either Serial Interface program.
• If you enter a correctly spelled query without a “
?
,” nothing will be
returned. Incorrectly spelled commands and queries are ignored.
Commands and queries and should have a space separating the
command and associated parameters.
• Leading zeros and zeros following a decimal point are not needed in a
command string, but they will be sent in response to a query. A leading
“
+
” is not required but a leading “
–
”
is
required.
4.1.7 Trouble
Shooting
New Installation
1. Make sure transmit (TD) signal line from the instrument is routed to
receive (RD) on the computer and vice versa. (Use a null modem
adapter if not).
2. Always send terminators
3. Send entire message string at one time including terminators.
(Many terminal emulation programs do not.)
4. Send only one simple command at a time until communication is
established.
5. Be sure to spell commands correctly and use proper syntax.
Old Installation No Longer Working
1. Power instrument off then on again to see if it is a soft failure.
2. Power computer off then on again to see if communication port is
locked up.
3. Check all cable connections.
Intermittent Lockups
1. Check cable connections and length.
2. Increase delay between all commands to 100 ms to make sure
instrument is not being over loaded.
3. Do not use the front panel keys during serial communication.
4.2
SERIAL INTERFACE COMMAND SUMMARY
This paragraph provides a summary of the Serial Interface Commands. The
Interface Commands are detailed in Paragraph 4.2.1. A list of all commands
is provided in Table 4-5.