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The two machines continuously share I/O data
with the relative bus, and interact each other only
in following conditions:
•
ProfiBus Data Exchange is suspended (static
diagnosis activated) if the internal serial link in
not established
•
Internal serial link Data Exchange is sus-
pended (only for output data) if the ProfiBus
State machine is not in Data Exchange mode
As a general rule, unrecoverable communication
errors make each machine to jump to the state
immediately
following
(WAIT_PRM or SRC_ADDR)
Message mapping
The communication is based on the continuous
data exchange capability of the ProfiBus standard,
where the master sends continuously the entire
PARAMETER BUFFER (17 BYTES)
OFFSET
SIZE
UNIT
BYTE
BYTE
RES
0
1
1
1
2
1
3
1
4
1
Sccm
5
2
7
2
Hz/mA/s
9
2
11
2
0.2*s
13
2
0.2*s
the
power-on
state
PROFIBUS MESSAGE MAPPING
RANGE
°C
15-35
Water Cooling Max Temperature
Enter here the max temperature you foreseen for your cooling system, this
value will set the maximum power provided to the pump (see Input Buffer
byte-4)
°C
1-5
Water Cooling Hysteresis
Set here the hysteresys on water cooling measurement (default=1,
don't change if not necessary)
%
1-99
Setpoint Hysteresis
Set the hysteresis on set point output (see set point out paragraph)
°C
-
Heather Jacket Temperature Setting
Specific option, not available on standard models
-
Flowmeter Threshold
Specific option, not available on standard models
-
-
Reserved
-
Setpoint Value
Set the threshold for the set point out
s
0-99999
Setpoint Mask Time
Set the time during the controller does not drive the set point out
0-65535
Vent Valve Opening Delay
0 = inf.
Set the delay time between the stop command and vent opening.
Valid only in "purge/vent auto mode" (Parameter Buffer byte-15 B1=0);
default = 15; 0 = infinite (the valve will never open)
0-65535
Vent Valve Open Time
0 = inf.
Set how long the vent will remain open, then both purge and vent will be
closed.
Valid only in "purge/vent auto mode" (Parameter Buffer byte-15 B1=0);
0 = infinite (the valve remain open till a start command)
slave configuration and reads back the entire slave
status.
For this purpose one Input (from slave to master)
and one Output (from master to slave) buffers are
provided. All the needed parameters are mapped
inside each buffer.
The following tables summarise the ProfiBus pa-
rameter access, related to the corresponding win-
dows serial protocol (for this protocol please refers
to the serial interface paragraph).
The interface doesn't any scaling operation on the
read/written parameters. It acts only as a gateway
between the ProfiBus network and the pump's
controller serial interface. As a consequence of
this, the scale and the meaning of some parame-
ters depends directly to the specific model of
Turbo Pump controller connected to the interface.
DESCRIPTION
87
TECHNICAL INFORMATION
SERIAL
87-900-968-01(C)
WIN
158
159
105
113
115
-
102
103
126
147
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