2 Functions
194
7UM61 Manual
C53000-G1176-C127-3
Address 9012 RTD 1 LOCATION informs the device on the mounting location of RTD
1. You can choose between Oil, Ambient, Winding, Bearing and Other. This
setting is only possible via DIGSI
®
at "Additional Settings".
Furthermore, you can set an alarm temperature and a tripping temperature. Depend-
ing on the temperature unit selected in the Power System Data (Section 2.2.2 in
address 276 TEMP. UNIT), the alarm temperature can be expressed in Celsius (°C)
(address 9013 RTD 1 STAGE 1) or Fahrenheit (°F) (address 9014 RTD 1 STAGE
1). The tripping temperature is set at address 9015 RTD 1 STAGE 2 in degree
Celsius (°C) or degree Fahrenheit (°F) at address 9016 RTD 1 STAGE 2.
The settings for all temperature detectors connected are made accordingly:
RTD-box Settings If temperature detectors are used with two-wire connection, the line resistance (for
short-circuited temperature detector) must be measured and adjusted. For this pur-
pose, select mode 6 in the RTD-box and enter the resistance value for the correspond-
ing temperature detector (range 0 to 50.6 Ω). If a 3-wire connection is used, no further
settings are required to this end.
A baudrate of 9600 bits/s ensures communication. Parity is even. The factory setting
of the bus number 0. Modifications at the RTD-box can be made in mode 7. The fol-
lowing convention applies:
Table 2-11 Setting the bus address at the RTD-box
Further information is provided in the operating manual of the RTD-box.
Processing Mea-
sured Values and
Messages
The RTD box is visible in DIGSI as part of the 7UM61 protection devices, i.e. messag-
es and measured values appear in the configuration matrix just like those of internal
functions, and can be masked and processed in the same way. Messages and mea-
sured values can thus be forwarded to the integrated user-defined logic (CFC) and in-
terconnected as desired. Pickup signals “RTD x St. 1 p.up” and “RTD x St.
2 p.up”, however, are neither included in the group alarms 501 “Relay PICKUP”
and 511 “Relay TRIP” nor do they trigger a fault record.
If it is desired that a message should appear in the event buffer, a cross must be
entered in the intersecting box of column/row.
Mode Number of RTD-boxes Address
simplex 1 0
half duplex 1 1
half duplex 2 1. RTD-box: 1
2. RTD-box: 2
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