Appendix
A.2 Load profile
SENTRON PAC4200
System Manual, 09/2009, A5E02316180B-02
225
A.2
Load profile
Additional information about the load profile.
The following flags are part of the load profile. The flags are written per period.
Flag
Value Meaning
TRUE Exception
Load profile values are uncertain
UNCERTAIN
FALSE Normal case
Load profile values are certain
TRUE Exception
The demand period was ended prematurely owing to
the failure of the supply voltage
AUXILIARY_VOLTAGE_FAILED
FALSE Normal case
TRUE Exception
The demand period was ended prematurely owing to
a resynchronization
RESYNCHRONIZED
FALSE Normal case
A.3
MODBUS
You can access the following measured variables:
●
Via the Ethernet interface with the Modbus TCP protocol
●
Via the PAC RS485 expansion module with the Modbus RTU protocol
Further information
You can find further details about the PAC RS485 expansion module and Modus RTU in the
"PAC RS485 Expansion Module" manual.
A.3.1
Measured variables without a time stamp with the function codes 0x03 and 0x04
Addressing the measured variables without a time stamp
The SENTRON PAC Power Monitoring Device provides measured variables with or without
a time stamp.