Adjusting the response of terminal CA (Pr. 869)
● Using Pr. 869, the output voltage response of the terminal CA can be adjusted in the range of 0
to 5 s.
● Increasing the setting stabilizes the terminal CA output more but reduces the response level.
(Setting "0" sets the response level to 7 ms.)
Calibration of terminal AM (C1 (Pr. 901))
● Terminal AM is initially set to provide a 10 V DC 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 V DC.
● Calibrate the AM terminal in the following procedure.
Connect a 0-10 V DC indicator (frequency meter) across terminals AM and 5 of the inverter.
(Note the polarity. The terminal AM is positive.)
Refer to the monitor description list (page 5-212) and set Pr. 158 "AM terminal function
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
If the meter needle does not point to maximum even at maximum output., calibrate it with C1
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 V DC is output from the
When Pr. 306 "Analog output signal selection" = "21", the terminal AM calibration cannot be per-
formed. 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 V DC to +10 V DC. Calibrate the terminal AM
with the maximum positive output value.
(M) Monitor display and monitor output signal
Connecting an analog meter to the AM output
10 V DC
5 - 223