[Am] And [Ami] Terminals - Hitachi L300P Series Instruction Manual

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Analog Output Operation
[AM] and [AMI]
Terminals
The [AM] and [AMI] terminals provide signals
to monitor various inverter parameters such as
output frequency, output current, and output
voltage. The terminals provide these analog
signal types:
• [AM] terminal: 0–10V analog output signal
• [AMI] terminal: 4–20mA analog output
signal
These signals both use the [L] terminal for signal
return. Six different inverter parameters may be
monitored independently at either the [AM] or
[AMI] terminal, as listed in the table below. Use
C028 to configure terminal [AM], and C029 to configure terminal [AMI].
Func. Terminal Code
00
01
04
C028 / [AM] /
C029 [AMI]
05
06
07
The analog signals may need some adjustment for gain or offset to compensate for variances in
the system. For example, the signals may drive a panel meter and require a full-scale gain
adjustment. The table below lists the function codes and their descriptions. The [AM] and
[AMI] terminals have separate gain and offset adjustments. Note the default values.
Func. Terminal
B080 [AM]
C086 [AM]
C087 [AMI]
C088 [AMI]
A GND
0–10V analog output
4–20mA analog output
Description
Output frequency
Output current
Output voltage
Input electric power
Thermal load ratio
LAD frequency
Description
Gain adjustment
Offset Adjustment
Gain adjustment
Offset Adjustment
FM
H O2 AM
AMI
L O OI
See I/O specs on page 4–8
Full Scale Value
0 – Max. frequency (Hz)
0 – 200%
0 – 100%
0 – 200%
0 – 100%
0 – Max. frequency (Hz)
Range Default
0 – 255 180
0.0 – 10.0V 0.0V
0 – 255 80
0.0 – 20.0mA 0.0mA