5-115
H91 PID Feedback Wire Break Detection
Using the terminal [C1] (current input) for PID feedback signal enables wire break detection and alarm (
cof
) issuance.
H91 specifies whether the wire break detection is enabled, or the duration of detection. (The inverter judges an input
current to the terminal [C1] below 2 mA as a wire break.)
- Data setting range: 0.0 (Disable alarm detection)
0.1 to 60.0 s (Detect wire break and issue
cof
alarm within the time)
H92, H93 Continuity of Running (P and I) (Refer to F14.)
H94 Cumulative Motor Run Time 1 (Refer to H44.)
H95 DC Braking (Braking response mode) (Refer to F20 through F22.)
H96 STOP Key Priority/Start Check Function
H96 specifies a functional combination of "STOP key priority" and "Start check function" as listed below.
Data for H96 STOP key priority Start check function
0 Disable Disable
1 Enable Disable
2 Disable Enable
3 Enable Enable
STOP key priority
Even when run commands are entered from the digital input terminals or via the RS-485 communications link (link
operation), pressing the
key forces the inverter to decelerate and stop the motor. After that,
er6
appears on the
LED monitor.
Start check function
For safety, this function checks whether any run command has been turned ON or not in each of the following
situations. If one has been turned ON, the inverter does not start up but displays alarm code
er6
on the LED
monitor.
• When the power to the inverter is turned ON.
• When the
key is pressed to release an alarm status or when the digital input terminal command RST ("Reset
alarm") is turned ON.
• When the run command source is switched by a digital input terminal command such as
LE ("Enable
communications link via RS-485 or fieldbus") or
LOC ("Select local (keypad) operation").
H97 Clear Alarm Data H45 (Mock Alarm)
H97 clears alarm data (alarm history and relevant information) stored in the inverter.
To clear alarm data, simultaneous keying of "
key + key" is required.
Data for H97 Function
0 Disable
1 Enable (Setting "1" clears alarm data and then returns to "0.")
H98 Protection/Maintenance Function (Mode selection)
H98 specifies whether to enable or disable automatic lowering of carrier frequency, input phase loss protection, output
phase loss protection, judgment threshold on the life of DC link bus capacitor, judgment on the life of DC link bus
capacitor, DC fan lock detection, braking transistor error detection, and IP20/IP40 switching, in combination (Bit 0 to
Bit 7).
Automatic lowering of carrier frequency (Bit 0) (Under V/f control only)
This function should be used for important machinery that requires keeping the inverter running.
Even if a heat sink overheat or overload occurs due to excessive load, abnormal surrounding temperature, or cooling
system failure, enabling this function lowers the carrier frequency to avoid tripping (
0h1
,
0h3
or
0luv
). Note that
enabling this function results in increased motor noise.
Input phase loss protection (
lin
) (Bit 1)
Upon detection of an excessive stress inflicted on the apparatus connected to the main circuit due to phase loss or
line-to-line voltage unbalance in the three-phase power supplied to the inverter, this feature stops the inverter and
displays an alarm
lin
.
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