Siemens siprotec SJ62 User Manual page 305

2 Functions
RTD-box Settings
Processing Mea-
sured Values and
Messages
303
1). The tripping temperature is set at address 9015 RTD 1 STAGE 2 in degrees
Celsius (°C) or Fahrenheit (°F) at address 9016 RTD 1 STAGE 2.
The settings for all temperature detectors connected are made accordingly.
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 2-24 Setting the bus address at the RTD-box
Mode
simplex
half duplex
half duplex
Further information is provided in the operating manual of the RTD-box.
The RTD-box is visible in DIGSI as part of the 7SJ62/63/64 protection devices, i.e.
messages 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
measured values can thus be forwarded to the integrated user-defined logic (CFC)
and interconnected 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 trip log.
If it is desired that a message should appear in the event log, a cross must be entered
in the intersecting box of column/row.
Number of RTD-boxes
1
1
2
C53000-G1140-C147-A, Edition 07.2015
Address
0
1
1. RTD-box: 1
2. RTD-box: 2
SIPROTEC 4, 7SJ62/63/64 Handbuch