
Manual 37139C
UMT 1 - Measuring Transducer
Page 52/62
© Woodward
Framework Data for Profibus DP
Receiving Range
Byte 0 and the following ..... Telegram according to description
Example: ............................. No. 1 - Byte 0/1 = telegram header "302"
No. 2 - Byte 2/3 = voltage L12
No. 3 - Byte 4/5 = voltage L23
No. 4 - Byte 6/7 = voltage L31
etc.
Byte 185 .............................. The bit 0 toggles every 2.5 seconds. This can be used for control if the interface still
functions flawlessly.
Transmitting Range (
Option SB
)
Byte 0 .................................. Block pre-selection (is not taken into account)
Byte 1 .................................. The bit 0 is used as a watchdog. If monitoring is enabled in the configuration screen,
this bit must be toggle every 4 seconds. The unit monitors this and possibly triggers a
fault and reinitializes the interface.
Byte 8/9 .............................. Control word 1
Byte 10/11 .......................... Control word 2
Byte 12/13 .......................... Control word 3
Connection Example
UMT
2005-08-31 | Data coupling 2005-08-31.skf
A
B
External unit
PLC
According to the specifications,
the PLC has to be possibly ter-
minated with a resistor too.
The Leon00d9.gsd has to
be used.
A-Line
B-Line
Screen
GND
RTS
+5 V
Pr
of
ibus
D
P
X3
X6
X4
X5
X2
X1
220 Ohm
390 Ohm
390 Ohm
Profibus DP
This resistor network
is only necessary for
a direct connection
without other bus
participants and
longer distances
Figure 7-9: Interface - Profibus DP slave