40
6.3.2 Virtual Keypad
A “virtual keypad” is displayed on the left-hand side of the dashboard tab, and acts as an interface for
several useful pieces of control and monitor information. For an overview of the virtual keypad interface,
refer to Figure 24. Note that it is recommended to suspend all external protocol-based communications
with PLC’s, etc. when using the virtual keypad, as other protocols may simultaneously be writing to the
inverter’s frequency command and operation command word, resulting in seemingly unpredictable
behavior.
Output frequency display:
Indicates the current output frequency of the inverter in large red numbers,
as reported by inverter function code M09. The image in Figure 24 indicates that the associated inverter
is currently running at 23.58Hz.
Frequency command entry box:
Allows the user to enter a new frequency command for the inverter,
which is subsequently scaled and written to inverter function code S05 when the “SET” button is clicked.
“SET” button:
Clicking this button will scale and write the value contained in the frequency command
entry box to inverter function code S05. Note that the inverter will use this frequency command as its
master frequency reference only when configured accordingly (refer to section 3.1).
General-purpose input terminal command buttons:
These buttons (labeled “X1” through “X9”) map
to the corresponding bits in the inverter’s operation command word (function code S06, bit #2 ... bit #10).
The usage of these bits varies depending on the configuration of inverter function codes E01 to E09.
When a given button is clicked and shown in its depressed state, the corresponding bit is set to a “1”.
When clicked again (and therefore shown in its non-depressed state), the corresponding bit is set to a
“0”. As an example, the image in Figure 24 shows X1...X7 as OFF (“0”), and X8 and X9 as ON (“1”).
Note that controlling these operation command word bits will only affect the inverter when it is configured
accordingly (refer to section 3.1).
Operating status display:
Indicates the current state of the inverter based on bits in the inverter
operation status register (function code M14). Possible displays include “STOP”, “FWD”, “REV” and
“FAULT”.
Operation command buttons:
Clicking on these buttons enables different control actions to be
imposed on the inverter, as follows:
•
FWD: sets bit #0 (“FWD”) and clears bit #1 (“REV”) in the operation command word (function code
S06).
Output frequency
display
Frequency
command entry box
“Write frequency
command to
inverter” button
General-purpose
input terminal
command buttons
Operation
command buttons
Operating status
display
Operation status
bits
Figure 24: Virtual Keypad Overview
