Mitsubishi Electric 800 Series Instruction Manual page 541

(A) Application parameters
Monitoring the trace status
• The trace status can be monitored on the operation panel by setting "38" in Pr.52 Operation panel main monitor
selection, Pr.774 to Pr.776 (Operation panel monitor selection).
Monitor
value
1000s place
0 or no
No trace data in internal RAM
display

1 Trace data in internal RAM
2 —
3 —

The "0(s)" to the left of the leftmost non-zero digit is(are) not shown in the monitor display.
For example, if no trace data is in internal RAM, the USB memory is not accessed, no trigger is detected, and the trace operation is performed,
"1" appears (not "0001").
• When copying the traced data to a USB memory device, the operating status of the USB host can be checked with the
inverter LED. For the overview of the USB communication function, refer to
LED status
OFF No USB connection.
ON The communication is established between the inverter and the USB device.
Traced data is being transmitted. (In the memory mode, transmission command is being issued. In the recorder
Flickering rapidly
mode, sampling is being performed.)
Flickering slowly Error in the USB connection.
• During trace operation, the trace status signal (Y40) can be output.
To use the Y40 signal, set "40 (positive logic) or 140 (negative logic)" in any of Pr.190 to Pr.196 (Output terminal function
selection) to assign the function to the output terminal.
NOTE
• Changing the terminal assignment using Pr.190 to Pr.196 (Output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr.52 Operation panel main monitor selection
Pr.178 to Pr.189 (Input terminal function selection)
540
PARAMETERS
1000s place
Indicates internal RAM state.
100s place
Indicates USB memory access state.
100s place
USB memory not accessed
USB memory being accessed Trigger detected
USB memory transfer error
USB buffer overrun
page 347
page 415
1s place
Indicates trace operation.
10s place
Indicates trigger state.
Trace status
10s place
Trigger not detected
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page 58.
Operating status
1s place
Trace stopped
Trace operation
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