APS 3A Series, Operation Manual

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3A SERIES OPERATION MANUAL
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2014 by Adaptive Power Systems, Inc. (APS) • All Rights Reserved • No reproduction without written authorization from APS.
3A SERIES AC & DC LOAD OPERATION MANUAL Page 32 of 56
6.2 AC Load Parameter Settings
The following parameters are specific to using the 3A Series in AC load mode as opposed to DC
load mode and only apply to AC applications.
•
Frequency Setting
•
Waveform and Crest Factor Bank Selection
•
Synchronization Source Setting
6.2.1 Frequency Setting
The range for the frequency setting of the 3A Series load is either DC or from 0.1 to 400 Hz. If a
value below 40Hz is entered, the frequency setting will automatically be set to DC.
Setting the expected AC frequency of the AC input voltage allows the 3A Series load to
synchronize to it properly using its internal synchronization circuits.
Once set, the SYNC setting has to be set to OFF for the frequency setting to be valid.
Remote Control Mode
When using the remote control interface, it is possible to auto-detect the AC input voltage
frequency by sending the following command.
AFREQ
Purpose: To enable or disable the auto-frequency detection function.
Command syntax: AFREQ {SP} {0 | 1 | OFF | ON} {;|NL}
Description:
AFREQ ON Enables the auto frequency detect function. Load will sense input voltage
frequency and synchronized the load current to the input voltage. In this mode of operation, the
regular “FREQ” command is ineffective.
AFREQ OFF
Disables the auto frequency detect function. This requires the frequency to be
set using the “FREQ” command. When AFREQ mode is turned off, the set frequency will be fixed
to the last detected input frequency.
For Example
：
AFREQ ON
AFREQ OFF