Programmable DC Electronic Load 63600 Series Operation & Programming Manual
6.2.2 Channel Summary
■ The Channel Summary registers summarize the channel status conditions up to 10
channels.
■ When an enabled bit in the Channel Status Event register is set, it causes the
corresponding channel bit in the Channel Summary Event register to be set.
■ Reading the Event register will reset it to zero.
■ The Channel Summary Enable register can be programmed to specify the channel
summary event bit from the existing channels that is logically ORed to become Bit 2
(CSUM bit) in the Status Byte register.
6.2.3 Questionable Status
■ The Questionable Status registers inform you one or more questionable status
conditions which indicate certain errors or faults have occurred to at least one channel.
Table 6-2 lists the questionable status conditions that are applied to the electronic load.
These conditions are same as the channel status conditions. Refer to Table 6-1 for a
complete description.
■ When a corresponding bit of Questionable Status Condition register is set, it indicates
the condition is true.
■ Program the PTR/NTR filter to select the way of condition transition in the Questionable
Status Condition register that will be set in the Event registers.
■ Reading 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.
Table 6-2 Bit Description of Questionable Status
Temperature Error (Over temperature).
Current Error (Over current).
Power Error (Over power).
Reverse voltage on input.
Maximum sine wave current limit
6.2.4 Output Queue
■ The Output Queue stores output messages until they are read from the electronic load.
■ The Output Queue stores messages sequentially on a FIFO (First-In, First-Out) basis.
■ It sets to 4 (MAV bit) in the Status Byte register when there are data in the queue.
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