YASKAWA CIMR-F7A User Manual

6-74
 Continuing Operation at Constant Speed When Frequency Reference Is
Lost
The frequency reference loss detection function continues operation using 80% speed of the frequency reference
before loss when the frequency reference using an master speed analog input* is reduced 90% or more in 400 ms.
When the error signal during frequency reference loss is output externally, set H2-01 to H2-03 (multi-function
contact output terminal M1-M2, P1-PC, and P2-PC function selection) to C (frequency reference lost).
* Frequency references using the following master speed analog inputs are used to detect a frequency loss.
• Analog input using terminal A1
• Analog input using terminal A2 when H3-09 (Multi-function analog input terminal A2 function selection) is set
to 0 (Add to terminal A1).
• Analog input using terminal A2 when H3-09 (Multi-function analog input terminal A2 function selection) is set
to 2 (Auxiliary frequency reference 1) and H3-13 (Terminal A1/A2 switching) is set to 1 (Use terminal A2 ana-
log input as the main speed frequency reference).
Related Constants
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
L4-05
Operation
when fre-
quency refer-
ence is
missing
0: Stop (Operation follows the
frequency reference.)
1: Operation at 80% speed
continues. (At 80% of speed
before the frequency
reference was lost)
Frequency reference is lost: Fre-
quency reference dropped over
90% in 400 ms.
0 or 1 0 No A A A A 49DH

YASKAWA CIMR-F7A Specifications

General

Brand	YASKAWA
Model	CIMR-F7A
Category	Inverter
Language	English