Mitsubishi FR-A800

(A) Application parameters
PARAMETERS
549
5
GROUP
A
Selection of trace mode (Pr.1021)
• Select how to save the trace data which results from sampling the inverter status.
• There are two trace data save methods, memory mode and recorder mode.
NOTE
• When the trace function is used in the recorder mode, use a USB memory device having at least 1 GB of free space.
• Data transferred to USB is saved in the "TRC" folder under the "FR_INV" folder.
• Up to 99 sets of trace data can be saved in the USB memory device. When data transfer to USB memory device reaches 99
sets of trace data, data is successively overwritten starting with the older data.
Setting of sampling cycle (interval) and number of sampling channels
(Pr.1022, Pr.1023)
• Set the sampling cycle (interval).
The shortest cycle in the recorder mode is 1 ms. When the recorder mode is set, sampling is performed at a sampling cycle
of 1 ms even if "0, 1" is set to Pr.1022 Sampling cycle.
• When the memory mode is set, the number of analog channels to sample can be set in the Pr.1023 Number of analog
channels. Start setting from the smaller channel number. Up to eight channels can be set. The sampling time becomes
shorter the more channels are set.
The number of channels is always 8 when the recorder mode is used or when digital channels are used.
• The sampling time differs according to the sampling cycle and number of sampling channels.
Pr.1021
setting
Mode Description
0 Memory mode
In this mode, trace data is saved sequentially to internal RAM on the inverter.
If automatic transfer is set, the trace data in internal RAM is transferred to USB memory device when the
trigger is being generated.
Data can be transferred to a USB memory device as long as data is held in internal RAM.
Trace data in internal RAM is cleared when the power supply is turned OFF or when the inverter is reset.
1
Memory mode
(automatic
transfer)
2 Recorder mode
In this mode, trace data is saved directly to USB memory device.
Sampling data is fixed at eight analog channels and eight digital channels.
The sampling cycle in this mode is longer than in the memory mode. (1 ms or longer)
Number of
channels
Memory mode sampling time
Minimum (Pr.1022 = "0") Maximum (Pr.1022 = "9")
1 213 ms 1704 s
2 160 ms 1280 s
3 128 ms 1024 s
4 106.5 ms 852 s
5 91.8 ms 728 s
6 80.0 ms 640 s
7 71.8 ms 568 s
8 60 ms 512 s