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Example 4: Remote Sequence (2-Wire) & Remote Reference
(4 – 20 mA)
(+)
External
4-20 mA
Source
(–)
This configuration is used when the start & stop signals and the frequency reference come from a remote
source, such as a PLC. It can also be used with a maintained switch when it is desirable to have the drive
restart on restoration of power. It should not be used where safety of attending personnel might be threatened
by a restart.
OPERATION:
•
Close (K1) to Run Forward.
•
Close (K2) to Run Reverse.
•
If both (K1) & (K2) are closed, the drive stops and displays the error message: "EF."
•
Frequency reference is proportional to the signal level at Terminal FI. 4mA = 0 Hz, 12mA = 30 Hz, &
20mA = 60 Hz.
•
If the drive is put in the "Local" mode using the LO/RE quick start LED, the drive will behave the same as
illustrated in Example 1.
Table 5: Programming Required For Remote 2-wire Sequence & Remote (4-20 mA) Reference
Parameter
Display
n001
n001
n004
n036
Set Motor FLA
Control Wiring Schematic
FS
FREF
FR
F/R
4-20 mA
FREQ. REF
DSPL
FC
DATA
ANALOG
ENTER
COMMON
Shield
(Drain Wire)
Description
The drive will perform a 2-wire reset.
10
Setting this value will reset all parameters to their original factory
settings (all previous adjustments will be lost). When the drive
completes the reset, this parameter returns to a value of 1.
4
After doing the reset above, the password parameter returned to a
1. Change it to a 4 to get access to all parameters in the drive.
This parameter sets terminal FR to be a 4-20mA input. NOTE:
Switch SW2 (2) must be closed ("on"). See page 2 for SW2(2)
3
location.
Enter the motor's full load amps as shown on the motor nameplate.
0.00
FOUT
IOUT
MNTR
LO/RE
PRGM
RUN
MIN
MAX
STOP
RESET
CAUTION
- x -
(K1)
Forward Run
S1
FWD
(K2)
Reverse Run
S2
REV
S3
S4
S5
S6
Shield (Drain Wire)
To Terminal
S7
SC
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