Status Registers; Status Subsystem Commands - Chroma 63800 Series Operation & Programming Manual

Programmable AC/DC Electronic Load 63800 Series Operation & Programming Manual
9.3

Status Registers

The Questionable Status registers inform you one or more questionable status
■
conditions, which indicate certain errors or faults have occurred. Table 9-1 lists the
questionable status conditions that are applied to the electronic load.
When the corresponding bit of Questionable Status Condition register is set, it indicates
■
the condition is true.
Reading of the Questionable Status Event register will reset it to zero.
■
The Questionable status Enable register can be programmed to specify the questionable
■
status event bit that is logically ORed to become Bit 3 (QUES bit) in the Status Byte
register.
Value Bit
Mnemonic Bit
FE 0
FREQ ERR 1
UV 2
OV 3
OC 5
OP 7
The Operation Status registers inform you one or more operation status conditions,
■
which indicate certain errors or faults have occurred. Table 9-2 lists the operation status
conditions that are applied to the electronic load.
When the corresponding bit of Operation Status Condition register is set, it indicates the
■
condition is true.
Reading of the Operation Status Event register will reset it to zero.
■
The Operation Status Enable register can be programmed to specify the operation status
■
event bit that is logically ORed to become Bit 7 (OPER bit) in the Status Byte register.
Value Bit
Mnemonic Bit
Weight
LF 0
OT 1
FF 2

9.3.1 Status Subsystem Commands

STATus:
QUEStionable:
EVENt
CONDition
ENABle
STATus:QUEStionable:EVENt?
Description
9-2
Table 9-1 Bit Description of Questionable Status
Weight
1 Under frequency range or over frequency range.
2 Frequency variation occurred condition while loading.
AC Mode voltage is lower than 45V, DC Mode voltage is
4
lower than 7.5V.
8 AC Mode voltage is higher than 350V.
32 AC/DC Mode current is higher than 18A or 45A.
64 AC/DC Mode power is higher than 1800W or 4500W.
Table 9-2 Bit Description of Operation Status
1 Load fail
2 Over temperature protection
4 FAN FAIL
Return the value of the event register
Return the value of the condition register
Enable specific bits in the Event register
: This query is the value of the Questionable Event register.
The Event register is a read-only register, which holds all
events. Reading the Questionable Event register clears it.
Meaning
Meaning