User manual

78 GMC-I Messtechnik GmbH
Overview – Significance of Register Contents
TCE Self-Test Error or Error During Calibration
 An error was recognized during the self-test.
 Device calibration error
 Calibration has not been completed successfully.
 At least one calibration value was not within the
allowable range.
CCR Constant Current Regulation
Output is/was in the current regulating mode.
CVR Constant Voltage Regulation
Output is/was in the voltage regulating mode.
CME Command Error
Faulty command
 Unknown command
 Syntax error
 Parameter value is not within the setting range.
DDTE Define Device Trigger Error
Error message for the device trigger setting
 *DDT command string > 80 characters
 *TRG command included in *DDT command string
EXE Execution Error
 Command-specific parameter value limits have been
exceeded.
 A command or a parameter is incompatible with the
present operating state.
LIME Limit Error
Limit value error after setting command USET, ISET, ULIM,
ILIM
 Voltage or current setpoint adjusted higher than the
selected limit value
 A limit value has been selected which is less than the
momentary voltage or current setpoint.
MAV Message Available
Ready message following a query command
 Requested data are in the output buffer.
 The MAV bit should only be queried by means of serial
polling during IEC bus mode operation.
OCPA Overcurrent Protection Active
Overcurrent protection is active.
 Output deactivated by OCP function
 Reactivate with OUTPUT ON
OL Overload
Overload message
 Power limiting has been triggered.
OPC Operation Complete
Ready message
 Commands preceding the *OPC command have been
executed (time synchronization).
OTPA Overtemperature Protection Active
Overcurrent protection is active.
 The device is overheated, e.g. due to obstructed vents.
 The OUTPUT ON setting command is ignored as long as
this condition persists, and causes repeated setting of
the OTPA bit in the event register.
OTPI Overtemperature Protection Inactive
Ready for operation message after OTPA overtemperature
message:
 The device has cooled back down.
 If the POWER-ON function is set to SBY or RST, the output
remains deactivated.
 If it has been set to RCL, automatic reactivation ensues.
OUTE Output Error
Error message after OUTPUT ON setting command:
Activation of the output is disabled by an OUTPUT OFF
signal at the trigger input of the analog interface.
 Display: “Err 25”
OVPA Overvoltage Protection Active
Overload protection has been triggered.
 The output has been deactivated.
 Reactivate with OUTPUT ON.
PON Power On
 The device was switched off for an interim period of
time.
QYE Output queue without message
Error message after addressing as talker:
 No message is (yet) available at the output buffer.
SEQB Sequence Busy
The SEQUENCE function is running.
SEQI Sequence Inactive
Ready message
 Sequence run ended or aborted
SEQE Sequence Error
Error message after SEQUENCE GO
 A voltage or current setpoint value which has been
recalled from sequence memory is higher than the
respective limit value (USET > ULIM or ISET > ILIM),
display “Err 21”.
 Memory range from the start address to the stop
address does not contain any executable values,
display: “Err 22”.
 The sequence run is aborted when this error message
appears.
S1A SIG1_OUT, Active Signal Occurred
S2A SIG2_OUT, Active Signal Occurred
S12A SIG1_OUT or SIG2_OUT active
TRGA Trigger at Analog Interface
Trigger signal detected at analog interface
Decimal Equivalent of Register Content
• Querying data registers always results in a decimal number.
• The decimal number designates the content of the register.
• For an 8-bit register, this number is within a range of 0 to 255.
• The number represents all set register bits.
• The number must be converted to a binary value to this end.
Example:
In response to the query CRA?, you receive the following
response: 52
Conversion: 52 : 2 = 26 rest 0 bit 0
26 : 2 = 13 rest 0 bit 1
13 : 2 = 6 rest 1 bit 2
6 : 2 = 3 rest 0 bit 3
3 : 2 = 1 rest 1 bit 4
1 : 2 = 0 rest 1 bit 5
0 : 2 = 0 rest 0 bit 6
0 : 2 = 0 rest 0 bit 7
The binary representation of 52
10
is thus: 0011 0100
2
• The binary representation indicates which bits are set in
condition register A (CRA).
3 (OL = overload)
5 (OVPA = overvoltage)
6 (OTPA = overtemperature)
• These bits may have triggered an SRQ (service request).