(M) Monitor display and monitor output signal
378
PARAMETERS
Calibration of terminal AM (C1 (Pr.901))
• Calibrate the AM terminal in the following procedure.
1) Connect a 0-10 VDC indicator (frequency meter) across terminals AM and 5 of the inverter.(Note the polarity. The
terminal AM is positive.)
2) Refer to the monitor description list (page 360) and set Pr.158 AM terminal function selection.
When the running frequency or inverter output current is selected on the monitor, set the running frequency or current
value at which the output signal will be 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 (Pr.901).
NOTE
• When outputting such an item as the output current, which cannot reach a 100% value easily by operation, set Pr.158 to "21"
(reference voltage output) and calibrate.10 VDC is output from the terminal AM.
• When Pr.306 Analog output signal selection = "21", the terminal AM calibration cannot be performed. For the details of
Pr.306, refer to the Instruction Manual of FR-A8AY.
•Use Pr.290 Monitor negative output selection to enable negative output from the terminal AM. When this is set, the output
voltage range will be -10 VDC to +10 VDC. Calibrate the terminal AM with the maximum positive output value.
Adjusting the response of terminal AM (Pr.867)
• Using Pr.867, the output voltage response of the terminal AM can be adjusted in the range of 0 to 5 s.
• Increasing the setting stabilizes the terminal AM output more but reduces the response level. (Setting "0" sets the response
level to 7 ms.)
Pr.54 FM/CA terminal function selection page 369
Pr.55 Frequency monitoring reference page 369
Pr.56 Current monitoring reference page 369
Pr.158 AM terminal function selection page 369
Pr.290 Monitor negative output selection page 369
Pr.291 Pulse train I/O selection page 324
• Terminal AM is initially set to provide a 10 VDC output in the full-scale state
of the corresponding monitor item. Calibration parameter C1 (Pr.901)
allows the output voltage ratio (gains) to be adjusted according to the
meter scale. Note that the maximum output voltage is 10 VDC.
AM
Inverter
10VDC
5
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