Maximum Ratio - PowerTec Digimax Installation And Operation Instruction Manual

If this parameter is set to 1, the analog input becomes a trim input for speed or ratio.
Five volts input is no effect. Voltages greater than five volts add to the setpoint; less than five
volts subtracts from the setpoint.
If it is set to 2, zero input is zero effect. Increasing voltage adds to the SETPOINT.
If set to 3, zero input is zero effect. Increasing voltage subtracts from the SETPOINT.
Parameter #20 determines the amount (or gain) of the trim. The trimming is done at the
sample rate (parameter #25). See page 7.
#27 #27 COMMUNICATIONS PROTOCOL COMMUNICATIONS PROTOCOL
#27 COMMUNICATIONS PROTOCOL #27 #27 COMMUNICATIONS PROTOCOL COMMUNICATIONS PROTOCOL
There are communications protocols built into the DIGIMAX
one of them for use in communications over the RS-422 link:
0 -Binary protocol
2 -Allen Bradley BCC protocol
#28 #28 D TO A SOURCE D TO A SOURCE
#28 #28 D TO A SOURCE #28 D TO A SOURCE D TO A SOURCE
The analog output at TB1 terminals 13 (+) and 12 (-) may be derived from four different
sources. This parameter selects the source of the output. Valid values are:
0 -Commanded Speed
2 -RS-422 link
The analog output is a voltage which is proportional to the value of the source between
parameter #29 (0 VDC out) and parameter #30 (10 VDC out).
For commanded or actual speed, the analog output will remain at 0 until parameter #29
is reached and then increase proportionally to +10VDC until parameter #30 is reached, after
which it remains at +10VDC.
From the RS-422 link, or from the keyboard, if a number less than parameter #29 or
a number greater than parameter #30 is entered an error code is generated. Press PGM/
CLR to clear the error and try again.
#29 #29 D TO A LOW ENGINEERING UNITS #29 #29 #29 D TO A LOW ENGINEERING UNITS D TO A LOW ENGINEERING UNITS D TO A LOW ENGINEERING UNITS D TO A LOW ENGINEERING UNITS
Valid values are from 0 to 99999.
The value in this parameter is the value (in engineering units) at which the D to A analog
output at TB1 terminals 13 (+) and 12 (-) should put out 0 VDC. See parameter # 28.
#30 D TO A HIGH ENGINEERING UNITS #30 #30 #30 #30 D TO A HIGH ENGINEERING UNITS D TO A HIGH ENGINEERING UNITS D TO A HIGH ENGINEERING UNITS D TO A HIGH ENGINEERING UNITS
Valid values are from 0 to 99999.
The value in this parameter is the value (in engineering units) at which the D to A analog
output at TB1 terminals 13 (+) and 12 (-) should put out 10 VDC. See parameter # 28.

#31 MAXIMUM RATIO

#31 #31 #31 #31 MAXIMUM RATIO MAXIMUM RATIO MAXIMUM RATIO MAXIMUM RATIO
Valid values are from 0 to 7.9999.
This parameter is the maximum ratio allowed. This affects the ratio SETPOINT the
same way that parameter #1 affects the speed SETPOINT.
#32 #32 #32 PRESET INPUT MODE #32 #32 PRESET INPUT MODE PRESET INPUT MODE PRESET INPUT MODE PRESET INPUT MODE
The digital input at terminal 6 on TB2 is normally used to activate the preset speed
mode (parameter #9). When a "0" is entered in this parameter, that is the case.
When a "1" is entered, it becomes a general purpose input (subject to software).
When a "2" is entered, it puts the DIGIMAX
a "2" into this input, return to command mode (press [CMD/ACT]), and enter a SETPOINT,
then press [ENT]. Energize TB2 terminal 6 and enter another SETPOINT and press [ENT].
Now the DIGIMAX
DIGIMAX Manual
® ® ® ® ®
DIGIMAX DIGIMAX DIGIMAX DIGIMAX will toggle between these two setpoint by the PRESET input on TB2.
®
1 - No selection (error message)
3 - Allen Bradley CRC protocol
1 - Actual Speed
3 - Keypad
DIGIMAX DIGIMAX DIGIMAX into a dual setpoint mode. AFTER entering
DIGIMAX ®
. This parameter selects
®
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