Terminal Am Calibration [Calibration Parameter Pr. 645, C1 (Pr. 901)] - Mitsubishi Electric FR-E700 Series Instruction Manual

Monitor display and monitor output signals
6.11.4

Terminal AM calibration [calibration parameter Pr. 645, C1 (Pr. 901)]

By using the operation panel or parameter unit, you can calibrate terminal AM to full scale deflection.
Pr. No. Name
645
AM 0V adjustment
C1
AM terminal calibration
(901)
The above parameters can be set when Pr. 160 "User group read selection" = 0.
The parameter number in parentheses is the one for use with the operation panel (FR-PA02) for the
FR-E500 series or parameter unit (FR-PU04/FR-PU07).
The above parameters allow their settings to be changed during operation in any operation mode
even if "0" (initial value) is set in Pr. 77 "Parameter write selection".
Terminal AM bias calibration
Use Pr. 645 AM "0V adjustment" to calibrate the bias side output signal from terminal AM. If the meter
needle does not point to 0 when the analog output from terminal AM is 0, add or decrease the Pr. 645
setting to adjust the meter needle points to 0. When changing ±1 in Pr. 645, the analog output chang-
es about ±5mV. (Analog output will not become lower than about −100mV even when setting the
Pr. 645 lower.)
NOTES
Calibration bias and gain changes when changing the control circuit terminal block. Use Pr. 645
and C1 (Pr. 901) to calibrate again in that case.
If bias calibration (Pr. 645) is performed, make sure to perform gain calibration (C1 (Pr. 901)) too.
6 - 148
Setting
Initial Value Description
Range
Calibrates the scale of the meter when analog output
1000 970–1200
is 0.
Calibrates the scale of the meter connected to termi-
— —
nal AM.
Terminal AM
output
Bias calibration of output
signal (Pr. 645)
Fig. 6-75:
Terminal AM bias calibration
Output
signal
Parameter
Refer to
Parameters referred to
Section
55 Frequency monitoring 6.11.3
reference
56 Current monitoring 6.11.3
reference
158 AM terminal function 6.11.3
selection
I001931E