SRS Labs CTC100, Руководство пользователя

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Remote Programming 92
CTC100 Programmable Temperature Controller
*STB?
Returns the value of the Status Byte (STB) register. The 8 bits of the Status Byte are assigned as
follows:
B it V a lue Description
7 128 Unassigned. Always 0.
6 64 Requested Service: set when the CTC100 issues a GPIB service request.
5 32 Event Summary Bit: set when a bit is set in both the ESE and ESR registers.
4 16 Message Available: set when data is waiting to be read on the GPIB port.
3 8 Unassigned. Always 0.
2 4 Error Available: set when errors are waiting in the error queue. This bit will
never be set unless System.COM.Verbose is set to Low.
1 2 Unassigned. Always 0.
0 1
(see the
channel. alarm.mask
instruction) is also set in the ASE register.
*TRG
Trigger command. Identical to the Group Execute Trigger (GET) bus message. Causes all
channels to read their outputs. The amount of time that it takes to process this command is twice
After receiving a trigger command, the CTC100 stops automatically acquiring data. The inputs
are only read, and PID feedback loops only update their outputs, when a
*TRG
command or a
GET message is received. PID feedback outputs will not function properly unless the CTC
receives
*TRG
commands or GET bus messages at the rate specified with the
System.Other.A/D
rate instruction.
To resume automatic sampling, set the A/D rate using
System.other.A/D rate
. For
example,
"System.other.A/D rate" = 100
sets the CTC100 to automatically sample every 100 milliseconds.
*TST?
Self-test. Returns a numeric error code that indicates whether data has been dropped
and whether ADC conversions are occurring at the correct rate.
First two digits: number of times ADC data has been dropped because of timing issues, or
30, whichever is smaller.
Third digit: the lowest-numbered slot from which data was dropped; zero if no data has
been dropped.
Fourth and fifth digits: ADC conversion rate; 00 = 100% of the expected value (as set by
System.Other.A/D rate ); 01=101% of expected, 99=99%, etc. A value of 99 or
101% is usually not a problem and indicates that the line frequency is not exactly 50 or 60
Hz, or that the CTC100
slow or fast. A value significantly
different from 100% may indicate a problem with the circuit that synchronizes the ADC
conversions to the AC line frequency.
The first 3 digits are cleared each time
*TST?
is issued.
For example, 13400 would indicate 13 read misses on slot 4 since the last time
*TST?
was
issued, and that the system clock is operating normally.
*WAI
Wait to Continue. Pauses the parent macro until other macros received on the same port, all
PID tuning processes (regardless of how they were started), and all setpoint ramps have finished.