Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Parameter Monitor display and monitor output signals
FR-A700 EC 6 - 333
6.15.4 Terminal CA, AM calibration [C0 (Pr. 900), C1 (Pr. 901), C8 (Pr. 930) to
C11 (Pr. 931)]
These parameters are used to calibrate the CA and AM analog outputs for the minimum and
maximum values, and you can also use them to compensate for the tolerances of your measu-
ring instruments. The same monitor signal can be output to the AM and the CA terminals. Howe-
ver, zero point calibration and the entry of a value to be associated with the zero point for the
monitor signal to be output are both only possible for the CA terminal.
The parameter number in parentheses is the one for use with the parameter unit (FR-PU04 or
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".
CA terminal calibration [C0 (Pr. 900), C8 (Pr. 930) to C11 (Pr. 931)]
Terminal CA is factory-set to provide a 20mA DC output in the full-scale status of the corre-
sponding monitor item. Calibration parameter C0 (Pr. 900) allows the output current ratios
(gains) to be adjusted according to the meter scale. Note that the maximum output current is
20mA DC.
Pr. No. Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
C0
(900)
CA terminal calibration — —
Calibrate the scale of the meter con-
nected to terminal CA.
54
55
56
158
CA terminal
function selection
Frequency moni-
toring reference
Current monitor-
ing reference
AM terminal func-
tion selection 6.15.3
6.15.3
6.15.3
6.15.3
C1
(901)
AM terminal
calibration
— —
Calibrate the scale of the analog meter
connected to terminal AM.
C8
(930)
Current output bias
signal
0% 0–100%
Output signal value for minimum analog
current output.
C9
(930)
Current output bias
current
0% 0–100%
Output current value for minimum analog
current output
(e.g. 0 or 4mA)
C10
(931)
Current output gain
signal
100% 0–100%
Output signal value for maximum analog
current output.
C11
(931)
Current output gain
current
100% 0–100%
Output current value for maximum ana-
log current outpu (e.g. 20mA)
Fig. 6-151:
Connecting an analog meter to the CA output
I001166E
Ammeter
0–20mA DC