Chapter 4 – Control Operation
ACH 500 Programming Manual 4-5
14 EXTERNAL REF 2
This parameter is the external frequency reference from control location R2,
displayed in percent. The signal source selection is made with Parameter
10.2.5 (External Ref2 Sel). Press [Up Arrow] to move to the next parameter.
15 RUN TIME
This parameter is an elapsed-time indicator. It counts time that a drive has an
Enable signal and a Start command, and is not in a faulted state. Counted time
cannot be reset. Press [Up Arrow] to move to the next parameter.
16 KILOWATT HOURS
This parameter counts kilowatt hours of drive operation. Press [Up Arrow] to
move to the next parameter.
17 LAST-RECD FAULT
This parameter displays the name of the most recent fault/warning message.
Refer to Chapter 5 – Fault Tracing in the Installation & Start-up Manual for
information on resetting faults. Press [Up Arrow] to move to the next
parameter.
18 SECOND-RECD
FAULT
This parameter displays the name of the second most recent fault/warning
message. Refer to Chapter 5 – Fault Tracing in the Installation & Start-up
Manual for information on resetting faults. Press [Up Arrow] to move to the
next parameter.
19 FIRST-RECD FAULT
This parameter displays the name of the third most recent fault/warning
message. Refer to Chapter 5 – Fault Tracing in the Installation & Start-up
Manual for information on resetting faults. Press [Up Arrow] to move to the
next parameter.
20 PARAMETER LOCK
This parameter indicates if the parameters are locked or open. If LOCKED or
OPEN are followed by xxx, then the parameter lock is from the Keypad,
otherwise the parameter lock is from a digital input. The parameter lock
allows you to lock all the ACH 500 parameters, protecting the parameters
from unauthorized changes through parameter Setting mode. Parameter
10.4.3 (Param. Lock Sel) allows you to select the Parameter Lock control
location. You may view locked parameters at any time.
When Parameter Lock is from the Keypad:
To lock: Press [ * ] to enter Setting mode. Press [Up Arrow] or [Down Arrow]
to change from OPEN xxx to LOCKED xxx. Press [ * ] to save the setting.
Press [Up Arrow] to move to the next parameter. To unlock the parameters:
1. Return to Operating Data Parameter 20 (Parameter Lock). The LCD
Display shows LOCKED xxx.
2. Press [ * ] to enter Setting mode.
3. Press and hold [Up Arrow] to change LOCKED xxx to LOCKED 358.
4. Press [ * ] to open the Parameter Lock. The LCD Display shows OPEN
xxx.
21 APPL BLOCK
OUTPUT
This parameter is the PI-Controller output signal. Refer to Figure 4-3 in the
External Control section of this chapter. Press [Up Arrow] to move to the next
parameter.
22 ACTUAL VALUE 1
This parameter is a feedback signal to the PI-Controller, displayed in percent.
Press [Up Arrow] to move to the next parameter.
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