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4.1.3.2 Standard Event Status and Standard Event Status Enable Registers
The Standard Event Status Register supplies various conditions of the instrument.
7
128
PON
Bits 2 and 6 are not used. The reports of this register occur only if the bits are enabled in the Standard Event
Status Enable Register along with bit 5 of the Service Request Enable Register.
The Standard Event Status Enable Register enables any of the Standard Event Status Register reports. The
Standard Event Status Enable command (*ESE) sets the Standard Event Status Enable Register bits. Set a
bit to enable its function. To set a bit, send the *ESE command with the bit weighting for each bit to set added
together. See the *ESE command for further details.
The Standard Event Status Enable Query, *ESE?, reads the Standard Event Status Enable Register. *ESR?
reads the Standard Event Status Register. Once this register is read, all bits are reset to zero.
Power On (PON) Bit (7). This bit is set when the power cycles from OFF to ON.
Command Error (CME) Bit (5). Set upon detection of a command error since the last reading. This means
the instrument could not interpret the command due to a syntax error, unrecognized header, unrecognized
terminators, or unsupported command.
Execution Error (EXE) Bit (4). Set upon detection of an execution error. Occurs when the instrument is
instructed to do something outside its capabilities.
Device Dependent Error (DDE) Bit (3). Reserved for future use.
Query Error (QYE) Bit (2). Indicates a query error. Occurs rarely and involves loss of data due to a full
output queue.
Operation Complete (OPC) Bit (0). Generated in response to the *OPC (operation complete) common
command. It indicates MPS completion of all selected pending operations.
4.1.4
Example IEEE Setup and Program
Below is an example of how to setup and run a simple program using the built-in MPS IEEE-488 Interface. It
does not reflect every hardware/software configuration found in the field. This example uses the National
Instruments GPIB - PCII/IIA card and QuickBasic 4.0 or 4.5 on a PC compatible.
4.1.4.1 GPIB Board Installation
Use the following procedure to install the GPIB Board.
1. Install GPIB-PCII/IIA card using National Instruments instructions.
2. Install NI - 488.2 software (for DOS). Version 2.1.1 was used for the example.
3. Verify that config.sys contains the command: device = C:\GPIB.COM
4. Reboot the computer.
5. Run IBTEST to test software configuration. Do not install the instrument before running IBTEST.
6. Run IBCONF to configure the GPIB - PCII/IIA board and dev 12. Set the EOS byte to 0AH. See setup in
Fig 4-1. IBCONF modifies gpib.com.
7. Connect the instrument to the interface board and power up the instrument. Verify the address as 12 and
the terminators as CR LF.
4-4
Lake Shore Model 647 Magnet Power Supply User's Manual
STANDARD EVENT STATUS REGISTER FORMAT
6
5
4
64
32
16
not used
CME
EXE
3
2
1
8
4
2
not used
DDE
QYE
OPC
Bit
0
1
Weighting
Bit Name
Remote Operation
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