Delta Electronics VFD-M Series, User Manual

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Chapter 4 Parameters
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Revision May 2008, ME14, SW V3.04 4-39
Settings Function Description
21 RESET Command (N.C)
22
Control source: External
Terminal
23 Control source: Keypad
24
Control source:
Communication
Enter values 22, 23, or 24 to set the control source to be the
external terminals, keypad or communication respectively.
This setting is used to create functions for manual/auto, and
remote/near-end control. When these three functions are
used at the same time, the priority is 22-I/O > 23-Keypad >
24-Communication.
25
Parameter Lock (Write
disable, Read is always
0)
This function will disable the write function and all the content
of read are 0. The application is for customer having a key to
control the operator to modify parameters or modify the
parameter by improper use.
26 PID Disable (N.O.)
27 PID Disable (N.C.)
This function pause the PID control. It is commonly used for
manual operation or function testing, and to recover the PID
function when the system is normal.
28 Second Source for
Frequency Command
This function is used with Pr. 142 to select a different
frequency source for control.
29 Forward (contact is
open) / Reverse (contact
is close)
This function has top priority to set the direction for running (If
“Pr. 24 inhibit REV function” is not set). No mater what the
present direction of run is, the contact N.O. is forward and the
contact N.C. is reverse, once this function is set.
The requirement for setting direction is Pr. 24 > setting 29 of
Pr. 39-Pr. 42 > Pr. 38.
30 One-Shot PLC Run
31 Index Input Signal
This function is used with parameters 149 to 151. The position
where AC drive stops will be regarded as the zero position
and it will move to the angle that Pr. 150 sets.
32 Virtual Timer Input
This function is for counting at the speed of the output
frequency.
Note: The settings 00~32 in Pr. 39 to Pr.42 can be used to set multi-function terminals (M2-M5) but
the settings cannot be used repeatedly at the same time (besides settings 20).