Terminal Ca, Am Calibration [C0 (Pr. 900), C1 (Pr. 901), C8 (Pr. 930) To C11 (Pr. 931)] - Mitsubishi Electric FR-F740 EC Instruction Manual

Monitor display and monitor output signals
6.10.4 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 ma-
ximum values, and you can also use them to compensate for the tolerances of your measuring
instruments. The same monitor signal can be output to the AM and the CA terminals. However,
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.
Pr. No. Name
C0
CA terminal calibration
(900)
C1
AM terminal
(901)
calibration
C8
Current output bias
signal
(930)
C9
Current output bias
(930) current
C10
Current output gain
(931)
signal
C11
Current output gain
current
(931)
The above parameters can be set when Pr. 160 = 0.
The parameter number in parentheses is the one for use with the 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".
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.
6 - 148
Initial Setting
Description
Value Range
Calibrate the scale of the meter
— —
connected to terminal CA.
Calibrate the scale of the analog meter
— —
connected to terminal AM.
Output signal value for minimum analog
0% 0–100%
current output.
Output current value for minimum analog
0% 0–100% current output
(e.g. 0 or 4mA)
Output signal value for maximum analog
100% 0–100%
current output.
Output current value for maximum ana-
100% 0–100%
log current outpu (e.g. 20mA)
Ammeter
0–20mA DC
Parameters referred to
54 CA terminal
function selection
55 Frequency moni-
toring reference
56 Current monitor-
ing reference
158 AM terminal func-
tion selection
Fig. 6-83:
Connecting an analog meter to the CA output
Parameter
Refer to
Section
6.10.3
6.10.3
6.10.3
6.10.3
I001166E