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MA7200 PLUS Operating Manual
TECO – Westinghouse Motor Company App-2 Fan and Pump
Note 1 - The previous Table 1.1.1 shows the Engineering Units that can be selected by P1-01.
Note 2 - Parameter P1-02 may be assigned a value in the range shown (10 – 9999)
only
when an Engineering Unit
from 2 to 24 is selected by parameter P1-02.
P1-01Engineering Unit is used to setup engineering units for normal and PID operation. It also sets the
display format and maximum value of the following parameters.
1 - Set point frequency command (An).
2 - The parameters for the engineering units.
3 - PID feedback monitor point Un-34.
When
P1-01 is set to 00, parameter Cn-28 can be used to set the display format of the frequency commands
(See Section 9.0 for more details). When P1-01 is set to a value of 01 to 25, parameter Cn-28 is ineffective.
The following Table 1.1.2 shows the display format and maximum value according to the setting of P1-01.
Table 1.1.2
Setting
of P1-01
Display Format
Maximum Value
Set Point and
Freq. Command
PID Feedback
Monitor and
Engineering
parameters
Set Point and
Freq. Command
PID Feedback
Monitor and
Engineering
parameters
0
Follow the
Setting of Cn-28
XXX.XX %
Follow the
Setting of Cn-28
100.00%
1 XXX.XX
%
100.00%
2 - 25
XXXX
Parameter P1-02
P1-02 Feedback Maximum is used to set the maximum value of the Engineering Units selected by P1-01,
provided P1-01 is
not
set to 00 or 01 (%). This value then becomes the maximum that can be set by all other
Engineering Unit parameters.
Example: P1-01 = 2 (PSI), P1-02 = 300, then the PID Feedback Signal (0 – 10V / 4-20mA) = 0 - 300PSI.
P1-01 must be set first and P1-02 must be set second before any other Engineering Units related parameters
can be set.
Monitor point Un-34, PID Feedback Display, is used to monitor the PID feedback signal applied to terminal AIN
or VIN, as set by parameter Sn-24. The Engineering Units and maximum value are set by parameters P1-01
and P1-02. The monitor value is zero if PID function is disabled. (See Fig.1.1.1 below)
PID Feedback
Monitor (Un-34)
P1-01
P1-02
Set
Engineering
Units and Max.
value
PID Feedback
Signal
Gain and Bias
AIN
(4-20 mA)
Bn-07
Bn-08
VIN
(0-10V)
Bn-05
Bn-06
Sn-24
Gain and Bias
Fig. 1.1.1