Data Sheet for Product

20
Siemens
023_A6V11905989_en
2022-01-
07
Returned energy (tariff T6)
The energy is totaled in tariff register 1 as calculated from the temperature cold side, and the
reference temperature.
Heat/cooling energy meter (tariff T7)
In tariff register 1, the measured cooling energy is totaled; in tariff register 2, the measured
heat energy. In both cases, a threshold can be defined via the temperature heat side (cold
threshold, heat threshold).
● Temperature above heat threshold and temperature difference >+0.2 K → thermal
energy is acquired
● Temperature below threshold and temperature difference >-0.2 K → Cooling energy is
acquired
Surcharge quantity tariff by means of return temperature (tariff T8)
The energy is totaled based on the temperature cold side in tariff registers 1 or 2.
The totaled energy is calculated from the temperature difference cold side and a defined
return temperature threshold (and not from the temperature difference).
● Return threshold exceeded: T1 is totaled.
● Return threshold breached: T2 is totaled.
Volume-weighted temperature (Tariff T14)
The result from multiplying the volume with the temperature on the heating side, is totaled in
tariff register 1. The result from multiplying the volume with the temperature on the cooling
side, is totaled in tariff register 2.
Only 'UltraAssist' can perform the tariff configuration.
The total of energy and volume in the standard registers is performed independently of the
tariff situation.
Log functions
In the internal logbook, measurement relevant events (errors, states, actions) are stored in
chronological order with the time of occurrence. The acquired events are predefined.
Logbook data cannot be deleted.
Each event is stored in a separate 4-level shift register; the overflows are transferred to a 30-
level circulating buffer. So that at least the last 4 times can be traced for each event.
In a monthly register, the error states are stored for the current month and the past 18
months (without time stamp).
Read out is via M-bus or the optical interface per 'UltraAssist'
Description
F0 = Flow measurement not possible
F1 = Interruption hot side temperature sensor
F2 = Interruption cold side temperature sensor
F3 = Electronics for temperature evaluation defective
F4 = Battery status critical (battery must be replaced)
F5 = Short circuit hot side temperature sensor