SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
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SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.

SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd. SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.

hitachi.america.us
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29.01.2015 Views

Chapter 4 Explanation of Functions 4.2.72 Low-current indication (LOC) signal The inverter outputs the low-current indication (LOC) signal when the inverter output current falls to the low-current indication signal detection level (C039) or less. Related code C021 to C025: Terminal [11] to [15] functions C026: Alarm relay terminal function C038: Low-current indication signal output mode selection C039: Low-current indication signal detection level You can select one of the two signal output modes with the low-current indication signal output mode selection (C038). In one mode, the LOC signal output is always enabled during the inverter operation. In the other mode, the LOC signal output is enabled only while the inverter is driving the motor for constant-speed operation. Item Function code Data or range of data Description Terminal function C021 to C025 43 LOC: Low-current indication signal Alarm relay terminal function C026 Enabling the signal output during 00 Low-current indication signal operation C038 output mode selection Enabling the signal output only 01 during constant-speed operation (*1 Setting of the threshold current level Low-current indication signal 0.0 to "2.0 x rated C039 at which to output the low-current detection level current" (A) indication signal (*1) When 01 (control circuit terminal) is selected as frequency source setting (A001), there is a case that inverter does not recognize the speed as constant value due to sampling. In this case, adjusting is to be made by setting C038=00 (valid during operation) or increasing analogue input filter (A016). Output current (A) Low-current indication signal detection level (C039) Low-current indication signal ON ON 4.2.73 Inverter ready signal (IRDY) Related code The inverter outputs the inverter ready (IRDY) signal when it is ready C021 to C025: Terminal [11] to [15] functions for operation (i.e., when it can receive an operation command). C026: Alarm relay terminal function - The inverter can recognize only the operation command that is input while the IRDY signal is output. - If the IRDY signal is not output, check whether the input power supply voltage (connected to the R, S, and T terminals) is within the range of specification. - Signal is not output when the power is given only to control power supply. Item Function code Data or range of data Description Terminal function C021 to C025 50 IRDY: Inverter ready signal Alarm relay terminal function C026 4.2.74 Forward rotation signal (FWR) The inverter continues to output the forward rotation (FWR) signal while it is driving the motor for forward operation. The FWR signal is turned off while the inverter is driving the motor for reverse operation or stopping the motor. Item Function code Data or range of data Description Terminal function C021 to C025 51 FWR: Forward rotation signal Alarm relay terminal function C026 4 - 70 Related code C021 to C025: Terminal [11] to [15] functions C026: Alarm relay terminal function

Chapter 4 Explanation of Functions 4.2.75 Reverse rotation signal (RVR) The inverter continues to output the forward rotation (RVR) signal while it is driving the motor for reverse operation. Related code C021 to C025: Terminal [11] to [15] functions C026: Alarm relay terminal function The RVR signal is turned off while the inverter is driving the motor for forward operation or stopping the motor. Item Function code Data or range of data Description Terminal function C021 to C025 52 RVR: Reverse rotation signal Alarm relay terminal function C026 Output frequency (Hz) Forward rotation signal Reverse rotation signal 4.2.76 Major failure signal (MJA) Related code The inverter outputs the major failure (MJA) signal in addition to C021 to C025: Terminal [11] to [15] functions an alarm signal when it trips because of one of the errors listed C026: Alarm relay terminal function below. (This signal function applies to the tripping caused by hardware.) No. Error code Description 1 E10.* CT error 2 E11.* CPU error 3 E14.* Ground-fault protection 4 E20.* Temperature error due to cooling-fan fault 5 E23.* Gate array communication error 6 E25.* Main circuit error Item Function code Data or range of data Description Terminal function C021 to C025 53 MJA: Major failure signal Alarm relay terminal function C026 4 - 71

Chapter 4 Explanation of Functions<br />

4.2.75 Reverse rotation signal (RVR)<br />

The inverter continues to output the forward rotation (RVR)<br />

signal while it is driving the motor for reverse operation.<br />

Related code<br />

C021 to C025: Terminal [11] to [15] functions<br />

C026: Alarm relay terminal function<br />

The RVR signal is turned off while the inverter is driving the motor for forward operation or stopping the<br />

motor.<br />

Item Function code Data or range of data Description<br />

Terminal function<br />

C021 to C025<br />

52 RVR: Reverse rotation signal<br />

Alarm relay terminal function<br />

C026<br />

Output frequency (Hz)<br />

Forward rotation signal<br />

Reverse rotation signal<br />

4.2.76 Major failure signal (MJA)<br />

Related code<br />

The inverter outputs the major failure (MJA) signal in addition to C021 to C025: Terminal [11] to [15] functions<br />

an alarm signal when it trips because of one of the errors listed<br />

C026: Alarm relay terminal function<br />

below.<br />

(This signal function applies to the tripping caused by hardware.)<br />

No. Error code Description<br />

1 E10.* CT error<br />

2 E11.* CPU error<br />

3 E14.* Ground-fault protection<br />

4 E20.* Temperature error due to cooling-fan fault<br />

5 E23.* Gate array communication error<br />

6 E25.* Main circuit error<br />

Item Function code Data or range of data Description<br />

Terminal function<br />

C021 to C025<br />

53 MJA: Major failure signal<br />

Alarm relay terminal function<br />

C026<br />

4 - 71

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