Cryo-con Model 24C
Remote Programming Guide
PIDTABLE commands
The PIDTABLE commands are used to transfer PID tables between the
Model 24C and the host controller. Use of the Cryo-con Utility software to transfer PID
tables is recommended since the process is relatively complex.
PID Tables are referenced by their index number, which is between 1 and 6. Table
data corresponding to a specific index may be identified using the PIDTABLE? query.
There is a maximum of 16 entries in each PID table. Each entry contains a setpoint,
P, I and D coefficients and a heater range.
The file format of a PID table is shown below:
<name>\n
<entry 0>\n
<entry 1>\n
*
*
*
<entry N>\n
;\n
Where:
<name> is the name of the table and is a maximum of 16 ASCII characters.
<entry> is a PID entry.
A line that contains only a single semicolon indicates the end of the table.
The format of an entry is:
<Setpt> <P> <I> <D> <range> <Source>\n
Fields are separated by a white space. The entry is terminated by a new line (\n)
character.
<Setpt> <P> <I> <D> are floating-point numbers that correspond to Setpoint,
Pgain, Igain and Dgain.
<range> is the heater range string.
<Input Channel> is the controlling source input channel and may be ChA, ChB,
ChC, ChD or Default. Note that default selects the input channel from the
loop's source setting.
Floating point numbers may be entered with many significant digits. They will be
converted to 32 bit floating point, which supports about six significant digits.
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