Mitsubishi Electric 800 Series Instruction Manual page 244

 Terminal AM calibration (C1) (AM type only)
• Terminal AM is initially set to provide a 10 VDC output in the full-scale state of the corresponding monitor item. The
calibration parameter C1 AM terminal calibration allows the output voltage ratio (gains) to be adjusted according to the
meter scale. Note that the maximum output voltage is 10 VDC.
Inverter
AM
5
• Calibrate the output via terminal AM in the following procedure.
1.
Connect a 0-10 VDC indicator (frequency meter) across terminal AM and terminal 5 on the inverter. (Note the
polarity. Terminal AM is positive.)
2.
Set a monitor item in Pr.158 AM terminal function selection. (Refer to
When the output frequency or inverter output current is selected on the monitor, set the output frequency or current
value at which the output signal is 10 V, using Pr.55 or Pr.56 beforehand.
3.
If the meter needle does not point to maximum even at maximum output, calibrate it with C1.
NOTE
• When outputting an item such as the output current, which cannot reach a 100% value easily by operation, set Pr.158 to "21"
(reference voltage output) and calibrate. A voltage of 10 VDC is output via terminal AM.
• When Pr.306 Analog output signal selection = "21", the output via terminal AM cannot be calibrated. For the details of
Pr.306, refer to the Instruction Manual of the FR-A8AY.
• Use Pr.290 Monitor negative output selection to enable negative signals output via terminal AM. The output voltage range
is -10 to +10 VDC. Calibrate the maximum positive value output via terminal AM.
 Calibration when 0 V is output via terminal AM (Pr.1200)
• When 0 is output via terminal AM, use Pr.1200 AM output offset calibration to calibrate the meter. If the meter needle
does not point to 0 while 0 is output via terminal AM, set a value in Pr.1200 so that the needle points to 0.
• Set a larger value in Pr.1200 when the needle points a minus output voltage while the 0 is output via terminal AM. Set a
smaller value in Pr.1200 when the needle points a plus output voltage while the 0 is output via terminal AM.
 Adjusting the response of terminal AM (Pr.867)
• Use Pr.867 to adjust the output voltage response of the terminal AM in the range of 0 to 5 seconds.
• Increasing the setting stabilizes the output via terminal AM more but reduces the response level. (Setting "0" sets the
response level to 6 ms.)
Parameters referred to
Pr.54 FM terminal function selectionpage 228
Pr.55 Frequency monitoring referencepage 228
Pr.56 Current monitoring referencepage 228
Pr.158 AM terminal function selectionpage 228
Pr.290 Monitor negative output selectionpage 228
10VDC
page 237.)
11. (M) Item and Output Signal for Monitoring
11.4 Adjustment of terminal FM and terminal AM
11
12
13
14
15
16
17
18
19
20
243