MITSUBISHI ELECTRIC FR-S520 - Manual (Page 122)

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REMARKS
•
Depending on the set value, it may take some for the needle to move.
•
If "1" is set in Pr. 30 "extended function display selection", the calibration parameter
C1 "FM terminal calibration" can also be set in the external operation mode.
•
C1 is factory-set to 1mA full-scale or 1440 pulses/s FM output frequency at 60Hz.
The maximum pulse train output of terminal FM is 2400 pulses/s.
•
When a frequency meter is connected across terminals FM-SD to monitor the
running frequency, the FM terminal output is filled to capacity at the factory
setting if the maximum output frequency reaches or exceeds 100Hz. In this case,
the Pr. 55 setting must be changed to the maximum frequency.
•
When the FR-PU04 is used, make calibration with Pr. 900.
POINT
By setting the Pr. 54 "FM terminal function selection" value, preset Pr. 55 "frequency
monitoring reference" or Pr. 56 "current monitoring reference" to the running
frequency or current value at which the output signal is 1440 pulses/s.
At 1440 pulses/s, the meter generally deflects to full-scale.
2
.12.2 Meter (frequency meter) calibration
(NA and EC version)
The AM terminal is factory-set to provide 5VDC output in the full-scale status of
each monitor item. However, calibration parameter C1 can be used to adjust the
output voltage ratio (gain) according to the meter scale. Note that the maximum
output voltage is 5VDC.
Parameter Name Factory Setting Setting Range Remarks
C1 (901)
AM terminal
calibration
——— ———
Setting is enabled when
Pr. 30 = "1"
The parameter number within the parentheses applies to when the parameter unit (FR-
PU04) is used.