Manual 37143A
MFR 15 - Protection Relay & Control
© Woodward
Page 105/119
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 switched ON 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
2003-01-24 | Datenkopplung 2003-01-24.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
Stream
GND
RTS
+5 V
P
rof
ib
us
DP
X3/Y3
X6/Y6
X4/Y4
X5/Y5
X2/Y2
X1/Y1
220 Ohm
390 Ohm
390 Ohm
Woodward unit
e.g. MFR 1, MFR 2, TÜG 4, etc.
Figure 7-4: Interface, Profibus DP slave