Chapter 6 – Parameters
ACH 500 Programming Manual
6-7
9 EXT REF2 MAXIMUM
0 Hz – 500 Hz (ACH 501)
0 Hz – 120 Hz (ACH 502)
This parameter sets the frequency corresponding to the maximum reference.
When Parameter 20.1.2 (Maximum Frequency) is changed, this parameter is
automatically set to the same value.
10 EXT REF2 OFFSET
Same as parameter 10.2.5.
11 EXT REF2 GAIN
Same as parameter 10.2.6.
Group 10.3
Preset Speeds
These parameter values can be altered with the ACH 500 running, except
those marked with (O). The Range/Unit column in Table 6-3 shows parameter
values. The text following the table explains parameter values in detail.
Table 6-3
Group 10.3
This Group has seven programmable preset speeds, ranging from 0.0 Hz to
500 Hz (ACH 501) or 0.0 Hz to 120 Hz (ACH 502), with a 0.01 Hz step.
When in External Control mode, preset speeds override any other reference.
Preset speeds are activated with Digital Input(s) selected through Parameter
10.3.1 (Preset Speed Sel).
Note: Parameter 10.3.8 (Preset Speed 7) is a fault frequency, which may be
activated in case of a serial communication fault or a loss of analog
input fault. Refer to Parameter 30.1.1 (Serial Fault Func) and 30.1.2
(AI < Min Func) when in external mode.
Parameter
Range/Unit
Description
1 PRESET SPEED SEL
(O)
Digital Inputs
Preset speed selection.
2 PRESET SPEED 1
0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Override frequency 1.
3 PRESET SPEED 2
0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Override frequency 2.
4 PRESET SPEED 3
0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Override frequency 3.
5 PRESET SPEED 4
0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Override frequency 4.
6 PRESET SPEED 5
0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Override frequency 5.
7 PRESET SPEED 6
0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Override frequency 6.
8 PRESET SPEED 7
0 – 500 Hz (ACH 501)
0 – 120 Hz (ACH 502)
Override frequency 7/Fault
Frequency (Refer to Parameters
30.1.1 and 30.1.2).
