Hioki RM3542-50, Instruction Manual

Page: 129 / 234

9.5 Communication Methods
123
9
 Standard Event Status Register (SESR)
The Standard Event Status Register is an 8-bit register.
If any bit in the Standard Event Status Register is set to 1 (after masking by the Standard
Event Status Enable Register), bit 5 (ESB) of the Status Byte Register is set to 1.
See: "Standard Event Status Register (SESR) and Standard Event Status Enable Register (SESER)" (p. 124)
The Standard Event Status Register is cleared in the following situations:
• When a "
∗
CLS
" command is executed
• When an event register query ( ∗
ESR?
) is executed
• When the instrument is powered on
Event Registers
Bit 7 PON
Power-On Flag
Set to 1 when the power is turned on, or upon recovery from an outage.
Bit 6 URQ
User Request
unused
Bit 5 CME
Command error (The command to the message terminator is ignored.)
This bit is set to 1 when a received command contains a syntactic or semantic er-
ror:
•
Program header error
•
Incorrect number of data parameters
•
Invalid parameter format
•
Received a command not supported by the instrument
Bit 4 EXE
Execution Error
This bit is set to 1 when a received command cannot be executed for some rea-
son.
•
The specified data value is outside of the set range
•
The specified setting data cannot be set
•
Execution is prevented by some other operation being performed
Bit 3
(unused)
DDE
Not used by this instrument
Device-Dependent Error
This bit is set to 1 when a command cannot be executed due to some reason other
than a command error, a query error or an execution error.
Bit 2 QYE
Query Error (the output queue is cleared)
This bit is set to 1 when a query error is detected by the output queue control.
•
When an attempt has been made to read an empty output queue (GP-IB only)
•
When the data overflows the output queue
•
When data in the output queue has been lost
•
When the next command is received while there is data in the output queue
Bit 1
RQC
(unused)
Request Control
Bit 0 OPC
Operation Complete
This bit is set to "1" in response to an "
∗
OPC
" command.
•
It indicates the completion of the operations of all messages up to the
∗
OPC
command.