Phoenix Contact SCK-M-U-1500V handleiding

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Additional functions

105608_en_02 PHOENIX CONTACT 65

8 Additional functions

8.1 Energy-saving mode

The monitoring system's energy requirements should be very low, so that it has as little

impact as possible on the energy balance of the overall photovoltaic system. This is why the

SOLARCHECK communication module has a switch-off function. This function is simply

activated by setting a time value (in seconds) in one of the registers for the communication

module. The module then remains in energy-saving mode for the specified time, meaning

that the connected measuring modules are switched off. Once this time has elapsed, the

communication module autonomously resumes communication with the connected mea-

suring units as well as their power supply. This reduces the energy consumption of the mon-

itoring equipment significantly.

Example: switching off nighttime monitoring

Because the photovoltaic system does not operate at night, for example, nighttime monitor-

ing with current and voltage measurements is not necessary either, as no values can be col-

lected during this time. For this reason, monitoring could be switched off for 10 hours (9 p.m.

to 7 a.m.), for example. Depending on the location of the system and the time of year, the

shutdown period can be further extended.

If, for example, status monitoring is nevertheless sporadically requested during the inactive

nighttime period, it is possible to program a cycle to wake up the system for a few minutes,

for example.

The individual operating time of the devices can be programmed completely via the higher-

level controller.

Shutdown programming:

A USIGN16 bit value is stored in register 04AEh for the required time.

Entering the value immediately sets the module to energy-saving mode. The mode is active

for at least 10 s (minimum value) and can be extended to 18.2 hours (65535 s, maximum

value). Writing the value to the register must therefore be supported on the controller side

with a corresponding timer. Energy-saving mode is either stopped automatically after the

set time has elapsed or by manually setting the time value in the register to “0” via the con-

troller.

The devices then start automatically and run as described for startup in Section “Startup” on

page 63.

Table 8-1 Assignment time – register value

Time Register value

10 s 10 (decimal)

60 s 60 (decimal)

5 min 300 (decimal)

1 h 3600 (decimal)

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