Service Support
Service Support
QWhen using monitoring CAN to communicate with the module, why does the module's message reply sometimes become disordered?
A
Each message request needs to ensure a certain time interval beforehand; otherwise, it will cause bus channel congestion.
QIs the module communication ID configuration implemented through external DIP switches? How exactly does the correspondence work?
A
ID = external DIP switch binary value + 1. For example: if all 5 DIP switches are OFF, then ID = 1; if the lowest bit is switched ON and the other bits are OFF, then ID = 2.
QThe guardian power module's guardian status is "not guarding," but the module still discharges according to the system voltage setpoint. What is the reason?
A
Check whether communication disconnection is enabled. In this case, it is most likely that the communication disconnection has not recovered, and the module directly enters voltage
regulation mode to ensure bus stability.
QWhat parameters need to be set for module discharging?
A
(1) Set the working mode to discharge;
(2) Set the discharge voltage;
(3) Set the discharge current;
(4) Set the bus voltage;
(5) Issue the power-on command (system power on/off register).
QWhat parameters need to be set for module charging?
A
(1) Set the working mode to charging;
(2) Set the equalizing charge voltage;
(3) Float charge voltage (lead-acid batteries have float charging, lithium batteries do not);
(4) Set the charging current;
(5) Set the float charge voltage;
(6) Issue the power-on command (system power on/off register).
QDoes the module's charging power and discharging power refer to the battery side or the bus side?
A
Battery-side power.
QWhat is the difference between the discharge voltage setting and the DC bus voltage setting?
A
Discharge voltage setting: In discharge mode, the minimum allowable discharge voltage on the battery side when the module operates normally. As the battery voltage gradually approaches
this value, the discharge current gradually decreases until it reaches 0. DC bus voltage setting: In discharge mode, the no-load output voltage on the high-voltage side of the module.
QWhat is auto-restart enable used for?
A
After the module is powered on and started for the first time, if the module shuts down due to a fault, it will automatically start up again after the fault is cleared.
QWhat is the module's BAT auto-switching mode?
A
When the module is set to BAT auto-switching mode, if the external battery voltage is higher than the set value, the module works in discharge mode; if the external voltage is lower than the
set value, the module works in charge mode.
QWhat is the module's BUS auto-switching mode?
A
When the module is set to BUS auto-switching mode, if the external bus voltage is higher than the set value, the module works in charge mode; if the external voltage is lower than the set
value, the module works in discharge mode.
QDoes the module need external pre-charging of the input capacitor first?
A
No need. The module has an internal soft-start circuit. When the power-on command is issued, it will first soft-start to charge the capacitor, ensuring a small voltage difference between the
port voltage and the capacitor voltage.
QWhen the PCS is charging, can the DC bus voltage be controlled?
A
Yes. In practical applications, PV and energy storage DCDC modules will both affect the DC bus voltage. After they are connected together, the final bus voltage depends on their power.