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= Key 1
= Key 2
= Key 3
= Maximum or consumption = Minimum or supply
Internal auxiliary input (Option)
The functions
- Reset real power EMAX,
- Tariff change over and
- Synchronizing the internal clock
can be controlled by the internal auxiliary input (option)
and external digital inputs of the
WAGO I/O System
.
Changes of condition of each auxiliary input are saved in
the event memors with date and time. The storage of the
changes of condition cannot be given up!
The assignment of the functions to the inputs is laid out
by the ciphers 1 to 6. If the internal auxiliary input
(option) and the external digital inputs are not used,
"oFF" appears in the indication. The producer's presetting
is "oFF".
The following assignment is possible:
Reset of real power EMAX
If an external reset occurs within the 15 minutes period,
the EMAX real power is deleted and a new period is
started.
If no external reset occurs within the programmed measu-
ring period, the reset is done by the internal clock.
If there are less than 30 seconds between two resets, the
measurement period is reset and the EMAX real power is
deleted. The former measured value is not used for high-
est nor lowest value storage and not saved in the ring
buffer although programmed.
Tariff change over
The tariff change over can be carried out externally via
the auxiliary input or internally via programmed swit-
ching times. If the tariff change over is carried out via the
auxiliary input, the change over is carried out by the
tariff meters Tx1 and Tx2.
If there is no voltage at the auxiliary input, tariff meter
Tx1
is active. If there is voltage at the auxiliary input,
tariff meter
Tx2
is active.
Synchronization of the internal clock
Inaccuracies of the internal clock can be corrected via
the keys on UMG 503 or via the auxiliary input.
If a voltage is connected to the auxiliary input, the clock
within the UMG 503 will be set to the next full hour.
Example 1
If the UMG 503 shows a time of 15:05, and a synchroni-
zation is carried out, the time will be corrected to 15:00.
Example 2
If the UMG 503 shows a time of 15:35, and a synchroni-
zation is carried out, the time will be corrected to 16:00.
Attention!
The assignment 5 and 6 cannot be program-
med not before the assignment of a serial
interface of the UMG 503 to
protocol "06"
(Modbus RTU Master) .
-
= Locked
z
= Via internal time program
i
= Internal auxiliary input
e1
= external "digital input 1"
e2
= external "digital input 2"
e3
= external "digital input 3"
Table: Assignment of auxiliary inputs
Auxiliary inputs
internal extern.
Function
oFF 1 2 3 4 5 6
Reset real power EMAX - - - i i e1 e1
Tariff change over
z i z z z e2 e2
Synchron. of the int. clock - - i - i i e3