Tabor 8020 - Machine Status Register (STT); Front Panel Error Messages; ILI (Illegal Instruction) Error; ILP (Illegal Parameter) Error

is cleared by sending *ESE0. Summary of *ESE
messages is given in the following.
*ESE0 - No mask.
*ESE1 - ESB on Operation Complete.
*ESE2 - ESB on Request Control.
*ESE4 - ESB on Query Error.
*ESE6 - ESB on Device Dependent Error.
*ESE16 - ESB on Execution Error.
*ESE32 - ESB on Command Error.
*ESE64 - ESB on User Request.
*ESE128 - ESB Power on.
4-14-3. Machine Status Register (STT)
The Machine Status Register (STT) is a special
register which contain the present front panel setting.
The STT is non-destructively read with the STT?
query. The response to this query is a NR1 <Numeric
Response Data> with the length of 11 digits. These
digits are numeric representation of the various Ma-
chine Status options as illustrated in Figure 4-6.
4-15. FRONT PANEL ERROR MESSAGES
The process of programming the Model 8020 involves
the proper use of syntax. Syntax is defined as the
orderly or systematic arrangement of programming
commands or languages. The Model 8020 must
receive valid commands with proper syntax or it will:
1. Ignore the part of the <Program Message Unit>
in which the invalid command appears.
2. Set appropriate bits in the Standard Event Status
Register.
3. Generate an SRQ if programmed to do so.
4. Display an appropriate front panel message.
4-15-1. ILI (Illegal Instruction) Error
An ILI error results when the Model 8020 receives
an invalid <Program Header> such as AMPL1.00.
This command is invalid because the real command
should read AMP1.00. When such an illegal <Program
Header> is detected by the instrument, the following
message will be displayed on the Model 8020 for
about one second:
ILI
4-15-2. ILP (Illegal Parameter) Error
An ILP error occurs when the <Numeric Data>
parameter associated with a legal <Program Header>
command is not valid. For example, the command
AMP100E+0 is not a valid option because the required
amplitude is outside the legal limits of the model
8020. When such an illegal <Numeric Data> is
detected, the following message will be displayed
on the Model 8020 for about one second:
ILP
4-15-3. ILE (Device Dependent) Error
An ILE error occurs when two legal <Program Mes-
sage> elements and when both elements have legal
<Program data>cause unacceptable conditions for
the instrument. For example, AMP10E+0; OFS6E+0
<Program Message> will cause an ILE error although
each <Program Message Unit> by itself could work
perfactly well under different condition. When such
an error is detected, the following message will be
displayed on the Model 8020 for about one second:
ILE
<Program Header> D S O V G T P/A C B U X Z
<Progran Data> 0 0 0 0 0 0 0 0 0 0 0 0
* Status given after IEEE-488.1 DCL or SDC commands, or afetr IEEE-488.2 *RST common command.
Figure 4-6. Machine Status String (STT) Interpretation *
IEEE-488.2 Operation Model 8020
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