Siemens SENTRON PAC4220 - Page 21

Tari󹪜s
The PAC4220 supports 2tari󹪜s for the integrated energy counter (high and low tari󹪜).
• Control of tari󹪜 switching
Switching between o󹪜-peak and on-peak can be controlled via the digital input or the
communications interfaces.
Time-related switching is only possible using a higher-level system
1)
.
• Tari󹪜 switching after synchronization
When synchronizing the power demand values via the communications interfaces or the
digital input, the tari󹪜 change will only become e󹪜ective after expiry of the period. Without
synchronization, the tari󹪜 change takes e󹪜ect immediately.
The synchronization frame contains the length of the demand period in minutes. The
synchronization command is ignored if the period length sent to the device with the
synchronization frame is di󹪜erent to the length parameterized in the device.
1)
This function will be available at a later time via a FW update.
Security
• Protection against unauthorized operation through PIN entry
1)
• Hardware write protection
• Device access control (IP allowlist)
1)
• Modbus TCP port, con󹪝gurable
1)
Using "Protection against unauthorized operation" and "Hardware write protection", you can
protect against write access to the device settings of the PAC4220. The data can continue to
be read without any restrictions.
The protection takes e󹪜ect in case of the following actions:
• Modify parameters in device.
• Reset maximum.
• Reset minimum.
• Reset counter.
• Reset device.
• Reset device to factory defaults.
• Reset password.
• Update 󹪝rmware on the device.
Note
Activ
ating hardware write protection
Irrespective of whether the power monitoring device is connected to a network, we
recommend always activating hardware write protection.
Description
2.1Performance features
PAC4220
Equipment Manual, L1V30827278B-01 19