Terminal Am Calibration - Mitsubishi Electric FR-E700 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 de-
flection.
Pr. No. Name
645
AM 0V adjustment
C1
AM terminal calibra-
(901)
tion
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 (PA02) for the
FR-E500 series or parameter unit (FR-PU04/FR-PU07).
The above parameters allow its setting 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 an-
alog output changes about ±5mV. (Analog output will not become lower than about −100mV
even when setting the Pr. 645 lower.)
Terminal AM
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
Initial Setting
Description
Value Range
Calibrates the scale of the meter when
1000 970–1200
analog output is 0.
Calibrates the scale of the meter con-
— —
nected to terminal AM.
output
Bias calibration of output
signal (Pr. 645)
Fig. 6-74:
Terminal AM bias calibration
Output
signal
Parameter
Refer to
Parameters referred to
Section
55 Frequency moni- 6.11.3
toring reference
56 Current monitor- 6.11.3
ing reference
158 AM terminal func- 6.11.3
tion selection
I001931E