327 analog in 2 loss, 340 analog out config – Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty User Manual
Page 103
Parameter Descriptions
4-71
Selects drive action when an analog signal loss is detected. (1.6V = signal loss,
1.9 = end of signal loss; 3.2 mA = signal loss, 3.8 mA = end of signal loss.)
One of the selections (1=Fault) stops the drive on signal loss. All other choices make it
possible for the input signal to return to a usable level while the drive is still running.
Important: Note that there is no signal loss detection while the input is in bipolar
voltage mode.
Selects the mode for analog outputs.
327 Analog In 2 Loss
Range:
0 = Disabled
1 = Fault
2 = Hold Input (use last frequency command)
3 = Set Input Lo (use Minimum Speed as frequency command)
4 = Set Input Hi (use Maximum Speed as frequency command)
5 = Goto Preset1 (use Preset1 as frequency command)
6 = Hold OutFreq (maintain last output frequency)
Default:
0 = Disabled
Access:
1
Path: Inputs & Outputs>Analog Inputs
See also: 91, 92
!
ATTENTION: Setting parameter 327 to a value greater than 1 allows the
input signal to return to a usable level while the drive is running. If a lost
analog signal is restored while the drive is running, the drive will ramp to
the restored reference level at the rate specified in Accel Time 1 (140),
Accel Time 2 (141), Decel Time 1 (142), and Decel Time 2 (143). Be
aware that an abrupt speed change may occur depending upon the new
reference level and the rate specified in these parameters. Failure to
observe this precaution could result in bodily injury.
340
Analog Out Config
Range:
See figure 4.31
Default:
1
Access:
1
Path: Inputs & Outputs>Analog Outputs
See also:
Figure 4.31 – Analog Out Config
x
x
x
1
x
x
x
x
x
x
x
x
x
x
x
x
10
0
1
2
3
4
5
6
7
8
9
11
12
13
14
15
1 =Current
0 =Voltage
x =Reserved
Bit #
Factory Default Bit Values
Analog Out
Nibble 1
Nibble 2
Nibble 3
Nibble 4