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Siemens Building Technologies
Commissioning instructions OZW775 V2.01
CE1C5663en
HVAC Products
Parameterize OZW775
22.06.2012
FB "Faults" is designed for 20 fault inputs. Inputs N.D1…N.D8 (digital) and N.X1…N.X8
(digital/analog) are connected to FB inputs "x". "Relay 1" and/or "Relay 2" is activated
depending on fault priority and source.
FB "Faults" handles faults and failures of the Synco devices ("System" faults) listed in
the device list as well as faults at the fault inputs and of the central communication unit
("Local" faults).
Connect one digital input to input "Ack" to acknowledge external faults. External fault
acknowledgement acts like pressing "Ack".
FB "Operating hours" can handle up to 5 runtime totalizers. The operational status
contacts of the aggregates are connected to FB inputs "d" via digital inputs N.D1...N.D8
or N.X1...N.X8 (configured as digital inputs)..
If a service interval is defined, the "Local" LED indicates when the number of operating
hours is reached and, if configured, a service alarm is issued.
FB "Meter" can handle up to 8 counting values. The universal inputs N.X1…N.X8
(configured as counting pulses) are connected to the FB inputs "i". The acquired
counting pulses from heat, water, gas, electricity meters are converted to consumption
values, e.g. energy in Wh, kWh or volume in m
3
. The 15 monthly values along with
readout dates are stored.
The 4 FBs "7-day time switch with control switch" allow for switching various consumers
in dependence of time via the relays N.Q_. Each 7-day time switch allows for program-
ming up to 6 switching points (3 "On", 3 "Off". Additionally, a configurable operation
selector with positions "Auto" / "Off" / "On" is integrated.
If you connect a time switch output "Q" to a relay input, position "Auto" ensures that the
relay is energized and deenergized as per the time program, or the relay is constantly
deenergized or energized.
In FB "System report", you can program the time a message is sent (hh:mm) as well as
the message cycle interval (1...255 days) for sending system reports. A system report
is sent to one or several message receivers depending on fault priority (urgent/not
urgent).
FB "Message receivers" is subdivided into 4 receivers. Message suppression via input
"d" acts on all receivers. You can set both receiver type and fault priority individually for
each receiver. Each receiver has a "Time switch with calendar" to program three
sending times per day and holidays/special days.
Example: All fault messages from Monday through Friday 08:00 - 18:00 are sent to
receiver "Service business receiver", e.g. to a fax machine. Outside these hours, the
fault status messages are sent to receiver "24-hour service", e.g. SMS to mobile phone.
The outputs "c" of FB "Message receivers" are connected to inputs "c" of the PC USB,
modem, or Ethernet interfaces. The PC USB interface is designed for local commis-
sioning, operation and monitoring (alarming).
Remote operation and monitoring are possible via modem (dial-up) and, at the same
time, via Ethernet (Internet/intranet) to one (or several) web browsers.
Function blocks
FB "Faults"
FB "Operating hours"
FB "Meter"
FB "7-day time switch
with operation selector"
FB "System report"
FB "Message receivers"
