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2 Functions
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
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
Further information is provided in the operating manual of the RTD-box.
Processing Mea-
The RTD box is visible in DIGSI as part of the 7UM61 protection devices, i.e. messag-
sured Values and
es and measured values appear in the configuration matrix just like those of internal
Messages
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.
194
®
Setting the bus address at the RTD-box
Mode
Number of RTD-boxes
simplex
half duplex
half duplex
at "Additional Settings".
1
1
2
Address
0
1
1. RTD-box: 1
2. RTD-box: 2
7UM61 Manual
C53000-G1176-C127-3
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