Mitsubishi Electric FR-A800, Instruction Manual

Page: 558 / 1042

(M) Monitor display and monitor output signal Parameters
5 - 378
●
Select whether the inverter output stops or the inverter operation continues when Y12 signal
turns ON, by setting Pr.167.
Zero current detection (Y13 signal, Pr. 152, Pr. 153)
●
If the output during inverter running remains lower than the Pr. 152 setting for the time set in
Pr. 153 or longer, the Zero current detection (Y13) signal is output from the inverter's open
collector or relay output terminal.
●
If the inverter output current drops to "0", because torque is not generated, slippage due to gravity
may occur, especially in a lift application.
To prevent this, the Y13 signal, which closes the mechanical brake at "0" output current, can be
output from the inverter.
●
For the Y13 signal, set "13 (positive logic) or 113 (negative logic)" in any of Pr. 190 to Pr. 196 (output
terminal function selection) to assign the function to the output terminal.
●
Select whether the inverter output stops or the inverter operation continues when Y13 signal
turns ON, by setting Pr.167.
Pr. 167 setting When Y12 signal turns ON When Y13 signal turns ON
0 (Initial value) Continuous operation Continuous operation
1 Inverter trip (E.CDO) Continuous operation
10 Continuous operation Inverter trip (E.CDO)
11 Inverter trip (E.CDO) Inverter trip (E.CDO)
Tab. 5-146: Selecting the behaviour of the inverter output at switching of Y12 and Y13
I001156E
Fig. 5-176: Zero current detection
NOTES The signals are enabled even when online or offline auto tuning is being executed.
The response time of the Y12 and Y13 signals is approximately 0.1 s. Note that the response time
varies with the load.
When Pr. 152 = "0", detection is disabled.
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.
Pr. 167 = "0"
Output current
Pr. 152
0 [A]
Zero current
detection signal
(Y13)
Pr. 152
Pr. 153
Detection time
Time
Start signal
0.1 s *
ON
Pr. 153
Detection time
OFF
ON OFF ON OFF
* When the output is restored to the Pr. 152 level, the Y13signal is turned OFF after 0.1 s.