Using Intelligent Input Terminals
Oper
ations
a
nd Moni
tor
ing
4–24
Analog Input
Current/Voltage
Select
The [AT] terminal operates in conjunction with parameter setting A005 to determine the analog
input terminals that are enabled for current or voltage input. Setting A006 determines whether
the signal will be bipolar, allowing for a reverse direction range. Note that current input signal
cannot be bipolar and cannot reverse direction (must use [FW] and [RV] command with current
input operation). The basic operation of the [AT] intelligent input is as follows:
•
[AT] = ON and A005 = 00 –
[AT] will enable terminals [OI]–[L] for current input,
4 to 20mA
•
[AT] = ON and A005 = 01 –
[AT] will enable terminals [O2]–[L] for voltage input
•
[AT] = OFF –
Terminals [O]–[L] are enabled for voltage input (A005 may be equal to
00 or 01) in this case
Be sure to set the frequency source setting A001=01 to select the analog input terminals.
Please refer to
“Analog Input Operation” on page 4–63
for more information on bipolar input
configuration, and the operating characteristics of analog inputs.
Reset Inverter
The [RS] terminal causes the inverter to
turn OFF the motor output and execute a
powerup reset. If the inverter is in Trip
Mode, the reset cancels the Trip state.
When the signal [RS] is turned ON and
OFF, the inverter executes the reset opera-
tion. The minimum pulse width for [RS]
must be 12 ms or greater. The alarm output
will be cleared within 30 ms after the onset
of the Reset command. Note the following:
• When the control terminal [RS] input is already ON at powerup for more than 4 seconds, the
remote operator display is “R-ERROR COMM<2>” (the display of the digital operator is
– – – –). However, the inverter has no error. To clear the digital operator error, turn OFF the
terminal [RS] input and press one of the operator keys.
• The active edge (leading or trailing) of the [RS] signal is determined by the setting of C102.
• A terminal configured with the [RS] function can only be configured as a normally open
contact. The terminal cannot be used in the normally closed contact state.
• When input power is turned ON, the inverter performs the same reset operation as it does
when a pulse on the [RS] terminal occurs.
NOTE:
For inverter models –1850Hxx to –4000Hxx: After an external reset input [RS] occurs,
the internal cooling fan turn ON after stopping once.
WARNING:
After the Reset command is given and the alarm reset occurs, the motor will
restart suddenly if the Run command is already active. Be sure to set the alarm reset after
verifying that the Run command is OFF to prevent injury to personnel.
Opt. Code
16
Symbol
[AT]
Valid for
Inputs
[1] to [8]
Required
Settings
A001 = 01
A005 = 00 /
01
A006 = 00 /
01 / 02
Default
terminal
[2]
Opt. Code
18
Symbol
[RS]
Valid for
Inputs
[1] to [8]
Required
Settings
B003, B007,
C102, C103
Default
terminal
[1]
[RS]
Alarm output
t
12 ms
minimum
approx. 30 ms
