Flowserve BUSwitch-Profibus-DP - Manual (Page 6)

LML0012-0 8/99 Page 6 of 6
©1999, Flowserve Corporation, Provo, Utah
Flowserve Corporation
Flow Control Division
Automax BUSwitch
TM
– Profibus-DP
765 South 100 East
Provo, Utah 84606
www.flowserve.com
Phone: 801 373 3028
Facsimile: 801 489 2228
Email: [email protected]
BUSwitch Output Data Packet
Word
↓
Bit → 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 VO VC EX LI TO
2 Odometer Counter (Most significant word)
3 Odometer Counter (Least significant word)
4 Reserved
5 Transition Timer ( 50 millisecond ‘ticks’ )
6 Firmware Version
Table 6 – Output Data Packet
VO (Valve is Open) This reflects the actual state of
the valve position by monitoring the state of the
OPEN proximity switch. A one in this bit position
indicates the OPEN proximity switch is closed.
VC (Valve is Closed) Reflects the actual state of the
valve by monitoring the CLOSED proximity switch.
A one in this position indicates the CLOSED
proximity switch is closed.
EX (EXternal Limit) This bit is set to one to indicate
an alarm condition depending on the state of the
external alarm input AND the value of the AL bit in
the input data packet. When AL is set to 0, if the
circuit connected to the external alarm input is
broken, the EX bit will be set to one. When AL is set
to 1, the circuit connected to the external alarm input
must be made for EX to be set.
LI (Odometer LImit) When the number of valve
transitions exceeds the odometer limit value, this bit
will be set to one.
TO (Valve TimeOut) This bit is set when the valve
has not reached its end of travel within the time
specified by either Valve Opening Response
Timeout or Valve Closing Response Timeout. This
bit is cleared upon reversal of motion. For example,
if the TO bit was set during a close operation, it will
only clear when the valve has been commanded to
open and the valve subsequently leaves the closed
position.
Transition Timer: This integer value indicates the
number of 50 millisecond periods that have elapsed
since the last request of valve motion and
completion of the valve movement. This value is
reset to zero upon change of direction.
Odometer Counter: This value is the cumulative
number of valve transitions since the counter was
reset. The value is incremented when the valve
completes a transition.
Firmware Version: Expresses the firmware version
of the BUSwitch in decimal form. The value should
be divided by 100 to obtain the correct form. For
example, a value of 113 in this word corresponds to
firmware version 1.13.
Reserved bits are reported back to the controller as
zero.
0518 II 2 G EEx d II T5