YASKAWA E7U Programming Manual page 61

Function: PI Disable
Setting: 19
When the PI Function has been enabled by b5-01 (PI Mode Selection), it can be indefinitely disabled by closing a digital input
configured as a PI Disable input (H1-0x= 19). When disabled, the Drive operates as a standard drive that does not have PI
enabled
Function: Program Lockout
Setting: 1B
A Program Lockout digital input will allow changing of parameter values when it is open but prevent changing of any Drive
parameter value except the Speed Command when it is closed. Parameter values can be viewed even when a Program
Lockout is active.
Function: TrimCtl Increase
Setting: 1C
Function: TrimCtl Decrease
Setting: 1D
The TrimCtl Increase and TrimCtl Decrease cannot be set independently. An OPE03 fault will occur if one is configured
without the other. Once both are configured they can be used to trim the Speed Command by adding or subtracting a set
frequency (d4-02) from the currently commanded speed. Once the input is cleared the Speed Command will return to the pre
TrimCtl level. Refer to Figure 28.
The TrimCtl Function is not effective when the Speed Command is coming from the digital operator.
Function: Ref Sample Hold
Setting: 1E
The Ref Sample Hold function will allow the user to sample an analog signal being input to either A1 or A2 and change the
Speed Command to the sampled level. Once the digital input that is configured for the Ref Sample Hold function (H1-0x= 1E)
is held for at least 100 ms, the Drive reads the analog input and changes the Speed Command to the newly sampled speed. If
the digital input is not held for at least 100 ms, the analog input will not be sampled.
Ref Sample
Hold Signal
Input
Fig. 38 Reference Sample Hold Time Chart
a
a
a =100 ms
Programming 55
Analog
Reference
Speed
Speed
Command
Command
t
ON (CLOSED)
OFF (OPEN)
t
TIME