P050: Output Frequency On Analog Reference Signal Loss - Hitachi L300P Series Instruction Manual

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"P" Group: Expansion Card Functions
Miscellaneous
Functions
Func.
Name
Code
P050 Output frequency on
analog reference signal
loss
(–xFE2/–xFU2 models
only) *1
The following table contains miscellaneous function(s) not in other function groups. Note that
P050 is only available on –xFE2/–xFU2 models.
"P" Function
Description
Four option codes:
00 Output freq. forced to
0 Hz; 500ms wait to
recover
01 Output forced to 0 Hz;
no wait to recover
02 Output freq. forced to
max. freq. A004
03 Output freq. forced to
A020/A220
Note 1: To ensure safe inverter operation in networked applications, you cannot change
(write) the value of P050 via the network; reading P050 is also prohibited.
P050: Output Frequency on Analog Reference Signal Loss – This function allows you to
configure the inverter's frequency output level in the event the analog reference input it is using
is (apparently) disconnected during operation. When the Frequency Source Setting is set to
control terminal input (A001=01), the [O], [O2], and [OI] inputs are available frequency refer-
ence sources. If the active analog input signal value remains lower than the Start Frequency
Adjustment value (B082), the inverter presumes the analog input signal may be disconnected.
The inverter application will determine the best option to use in the event of an analog signal
disconnect. Be sure to consider personnel safety and equipment limitations such as range of
travel and maximum speed. The available output responses to analog reference signal loss are:
1. P050=00: The output frequency is forced to 0 Hz. It follows the analog input value immedi-
ately when it becomes greater than the Start Frequency value (without 500ms wait).
2. P050=01: The output frequency is forced to 0 Hz, recovering 500ms after the analog input
exceeds the Start Frequency value.
3. P050=02: The output frequency is forced to the Maximum Frequency value (A004), recov-
ering 500ms after the analog input exceeds the Start Frequency value.
4. P050=03: The output frequency is forced to the Multi-Speed 1 setting (A020/A220), recov-
ering 500ms after the analog input exceeds the Start Frequency value.
The timing diagram below illustrates the four available output frequency responses for a
disconnect event, using the different P050 settings. For the purpose of this example, the analog
input "disconnect" value is less than the start frequency but slightly greater than zero.
[FW, RV]
Output
frequency
0
Analog input
[O], [OI], [O2]
Start freq.
B082
0
Defaults
Run
Mode
Edit
–FE2 –FU2 –FR
Lo Hi
(EU) (US) (JP)
✘ ✔
00 00 —
P050=02
P050=03
P050=00
P050=01
500 ms
SRW Display
Units
— >P050 OPTION1
SELECT OFF
500 ms
t